• Object#block in <main> (pry):2
    • StudentsController#view_context $GemPath0/gems/actionview-5.1.2/lib/action_view/rendering.rb:71
      • StudentsController#view_context_class $GemPath0/gems/actionview-5.1.2/lib/action_view/rendering.rb:58
        • Kernel#class $GemPath0/gems/actionview-5.1.2/lib/action_view/rendering.rb:59
        • StudentsController.view_context_class $GemPath0/gems/actionview-5.1.2/lib/action_view/rendering.rb:36
          • StudentsController.supports_path? $GemPath0/gems/actionpack-5.1.2/lib/abstract_controller/base.rb:162
          • Kernel#respond_to? $GemPath0/gems/actionview-5.1.2/lib/action_view/rendering.rb:39
          • StudentsController._routes -> block (3 levels) in url_helpers $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:552
            • StudentsController.block (3 levels) in url_helpers $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:552
          • Kernel#respond_to? $GemPath0/gems/actionview-5.1.2/lib/action_view/rendering.rb:40
          • StudentsController._helpers -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
            • StudentsController.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
          • Class#new $GemPath0/gems/actionview-5.1.2/lib/action_view/rendering.rb:42
            • Class#initialize $GemPath0/gems/actionview-5.1.2/lib/action_view/rendering.rb:42
              • Class#inherited $GemPath0/gems/actionview-5.1.2/lib/action_view/rendering.rb:42
              • #<Class:0x007f5bf94def48>.block in view_context_class $GemPath0/gems/actionview-5.1.2/lib/action_view/rendering.rb:42
                • ActionDispatch::Routing::RouteSet#url_helpers $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:476
                  • Class#new $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:479
                    • Module#initialize $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:479
                      • #<Module:0x007f5bf920dd50>.block in url_helpers $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:479
                        • Kernel#extend(ActiveSupport::Concern) $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:480
                          • Module#extend_object $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:480
                          • ActiveSupport::Concern.extended $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:107
                            • Kernel#instance_variable_set $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:108
                        • Module#include(#<Module:0x007f5bf920dd50>) $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:481
                          • ActionDispatch::Routing::UrlFor.append_features(#<Module:0x007f5bf920dd50>) $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:111
                            • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:112
                            • Kernel#instance_variable_get $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:113
                          • ActionDispatch::Routing::UrlFor.included $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:124
                            • Kernel#nil? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:125
                            • Module#included $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:130
                        • Class#new $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:485
                          • Class#initialize $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:485
                            • Class#inherited $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:485
                            • #<Class:0x007f5bfc3e6930>.block (2 levels) in url_helpers $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:485
                              • Module#include(#<Class:0x007f5bfc3e6930>) $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:486
                                • ActionDispatch::Routing::UrlFor.append_features(#<Class:0x007f5bfc3e6930>) $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:111
                                  • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:112
                                  • Module#< $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:116
                                  • Array#each $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:117
                                  • Module#append_features(ActionDispatch::Routing::UrlFor) $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:118
                                  • Module#const_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:119
                                  • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:120
                                  • Module#class_eval $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:120
                                    • #<Class:0x007f5bfc3e6930>.block in <module:UrlFor> $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/url_for.rb:89
                                      • Module#method_defined? $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/url_for.rb:90
                                      • Kernel#respond_to? $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/url_for.rb:92
                                      • #<Class:0x007f5bfc3e6930>.class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:71
                                        • Array#extract_options! $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/array/extract_options.rb:22
                                          • Array#last $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/array/extract_options.rb:23
                                          • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/array/extract_options.rb:23
                                        • Hash#fetch $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:73
                                        • Hash#fetch $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:73
                                        • Hash#fetch $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:74
                                        • Hash#fetch $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:74
                                        • Hash#fetch $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:75
                                        • Array#each $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:77
                                          • #<Class:0x007f5bfc3e6930>.block in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:77
                                            • #<Class:0x007f5bfc3e6930>.remove_possible_singleton_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:10
                                              • Kernel#singleton_class $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:11
                                              • BasicObject#instance_eval $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:11
                                                • #<Class:#<Class:0x007f5bfc3e6930>>.block in remove_possible_singleton_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:11
                                                  • #<Class:#<Class:0x007f5bfc3e6930>>.remove_possible_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:3
                                                    • Module#method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                                    • Module#private_method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                            • Kernel#define_singleton_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:79
                                              • BasicObject#singleton_method_added $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:79
                                            • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:81
                                            • #<Class:0x007f5bfc3e6930>.remove_possible_singleton_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:10
                                              • Kernel#singleton_class $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:11
                                              • BasicObject#instance_eval $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:11
                                                • #<Class:#<Class:0x007f5bfc3e6930>>.block in remove_possible_singleton_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:11
                                                  • #<Class:#<Class:0x007f5bfc3e6930>>.remove_possible_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:3
                                                    • Module#method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                                    • Module#private_method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                            • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:82
                                            • Kernel#define_singleton_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:82
                                              • BasicObject#singleton_method_added $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:82
                                            • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:84
                                            • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:86
                                            • #<Class:0x007f5bfc3e6930>.remove_possible_singleton_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:10
                                              • Kernel#singleton_class $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:11
                                              • BasicObject#instance_eval $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:11
                                                • #<Class:#<Class:0x007f5bfc3e6930>>.block in remove_possible_singleton_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:11
                                                  • #<Class:#<Class:0x007f5bfc3e6930>>.remove_possible_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:3
                                                    • Module#method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                                    • Module#private_method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                            • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:87
                                            • Kernel#define_singleton_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:87
                                              • BasicObject#singleton_method_added $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:87
                                            • #<Class:0x007f5bfc3e6930>.remove_possible_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:3
                                              • Module#method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                              • Module#private_method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                            • Module#define_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:110
                                              • Module#method_added $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:110
                                            • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:118
                                            • #<Class:0x007f5bfc3e6930>.remove_possible_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:3
                                              • Module#method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                              • Module#private_method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                            • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:119
                                            • Module#define_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:119
                                              • Module#method_added $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:119
                                            • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:123
                                            • #<Class:0x007f5bfc3e6930>.remove_possible_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:3
                                              • Module#method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                              • Module#private_method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                            • Module#attr_writer $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:124
                                              • Module#method_added $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:124
                                      • #<Class:0x007f5bfc3e6930>.default_url_options= -> block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:87
                                        • #<Class:0x007f5bfc3e6930>.block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:87
                                          • Kernel#singleton_class $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:88
                                          • Module#class_eval $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:88
                                            • #<Class:#<Class:0x007f5bfc3e6930>>.block (3 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:88
                                              • #<Class:#<Class:0x007f5bfc3e6930>>.remove_possible_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:3
                                                • Module#method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                                • Module#undef_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:5
                                                  • BasicObject#singleton_method_undefined $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:5
                                              • Module#define_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                                • BasicObject#singleton_method_added $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                          • Module#singleton_class? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:93
                                      • Kernel#respond_to? $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/url_for.rb:101
                                • ActionDispatch::Routing::UrlFor.included $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:124
                                  • Kernel#nil? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:125
                                  • Module#included $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:130
                              • Module#include(#<Module:0x007f5bfa009558>) $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:487
                                • Module#append_features(#<Module:0x007f5bfa009558>) $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:487
                                • Module#included $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:487
                              • Module#include(#<Module:0x007f5bfa009580>) $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:488
                                • Module#append_features(#<Module:0x007f5bfa009580>) $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:488
                                • Module#included $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:488
                              • Module#attr_reader $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:490
                                • Module#method_added $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:490
                              • Module#method_added $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:492
                              • Module#method_added $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:496
                        • Class#new $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:501
                          • #<Class:0x007f5bfc3e6930>#initialize $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:492
                        • #<Class:#<Module:0x007f5bf920dd50>>.singleton class $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:503
                          • BasicObject#singleton_method_added $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:504
                          • BasicObject#singleton_method_added $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:508
                          • BasicObject#singleton_method_added $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:512
                          • BasicObject#singleton_method_added $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:516
                          • BasicObject#singleton_method_added $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:520
                          • BasicObject#singleton_method_added $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:524
                          • BasicObject#singleton_method_added $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:528
                          • BasicObject#singleton_method_added $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:529
                        • Kernel#extend(#<Module:0x007f5bfa009580>) $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:537
                          • Module#extend_object $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:537
                          • Module#extended $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:537
                        • Module#include(#<Module:0x007f5bfa009580>) $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:541
                          • Module#append_features(#<Module:0x007f5bfa009580>) $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:541
                          • Module#included $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:541
                        • Module#include(#<Module:0x007f5bfa009558>) $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:546
                          • Module#append_features(#<Module:0x007f5bfa009558>) $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:546
                          • Module#included $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:546
                        • Kernel#extend(#<Module:0x007f5bfa009558>) $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:547
                          • Module#extend_object $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:547
                          • Module#extended $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:547
                        • #<Module:0x007f5bf920dd50>.included $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:124
                          • NilClass#nil? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:125
                          • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:126
                        • Module#define_method $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:558
                          • Module#method_added $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:558
                        • Module#define_method $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:560
                          • Module#method_added $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:560
                        • Module#private $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:564
                • Module#include(#<Class:0x007f5bf94def48>) $GemPath0/gems/actionview-5.1.2/lib/action_view/rendering.rb:44
                  • #<Module:0x007f5bf920dd50>.append_features(#<Class:0x007f5bf94def48>) $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:111
                    • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:112
                    • Module#< $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:116
                    • Array#each $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:117
                      • #<Module:0x007f5bf920dd50>.block in append_features $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:117
                        • Module#include(#<Class:0x007f5bf94def48>) $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:117
                          • ActionDispatch::Routing::UrlFor.append_features(#<Class:0x007f5bf94def48>) $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:111
                            • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:112
                            • Module#< $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:116
                            • Array#each $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:117
                            • Module#append_features(ActionDispatch::Routing::UrlFor) $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:118
                            • Module#const_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:119
                            • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:120
                            • Module#class_eval $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:120
                              • #<Class:0x007f5bf94def48>.block in <module:UrlFor> $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/url_for.rb:89
                                • Module#method_defined? $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/url_for.rb:90
                                • Kernel#respond_to? $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/url_for.rb:92
                                • #<Class:0x007f5bf94def48>.class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:71
                                  • Array#extract_options! $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/array/extract_options.rb:22
                                    • Array#last $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/array/extract_options.rb:23
                                    • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/array/extract_options.rb:23
                                  • Hash#fetch $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:73
                                  • Hash#fetch $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:73
                                  • Hash#fetch $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:74
                                  • Hash#fetch $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:74
                                  • Hash#fetch $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:75
                                  • Array#each $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:77
                                    • #<Class:0x007f5bf94def48>.block in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:77
                                      • #<Class:0x007f5bf94def48>.remove_possible_singleton_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:10
                                        • Kernel#singleton_class $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:11
                                        • BasicObject#instance_eval $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:11
                                          • #<Class:#<Class:0x007f5bf94def48>>.block in remove_possible_singleton_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:11
                                            • #<Class:#<Class:0x007f5bf94def48>>.remove_possible_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:3
                                              • Module#method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                              • Module#private_method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                      • Kernel#define_singleton_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:79
                                        • BasicObject#singleton_method_added $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:79
                                      • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:81
                                      • #<Class:0x007f5bf94def48>.remove_possible_singleton_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:10
                                        • Kernel#singleton_class $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:11
                                        • BasicObject#instance_eval $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:11
                                          • #<Class:#<Class:0x007f5bf94def48>>.block in remove_possible_singleton_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:11
                                            • #<Class:#<Class:0x007f5bf94def48>>.remove_possible_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:3
                                              • Module#method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                              • Module#private_method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                      • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:82
                                      • Kernel#define_singleton_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:82
                                        • BasicObject#singleton_method_added $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:82
                                      • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:84
                                      • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:86
                                      • #<Class:0x007f5bf94def48>.remove_possible_singleton_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:10
                                        • Kernel#singleton_class $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:11
                                        • BasicObject#instance_eval $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:11
                                          • #<Class:#<Class:0x007f5bf94def48>>.block in remove_possible_singleton_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:11
                                            • #<Class:#<Class:0x007f5bf94def48>>.remove_possible_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:3
                                              • Module#method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                              • Module#private_method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                      • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:87
                                      • Kernel#define_singleton_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:87
                                        • BasicObject#singleton_method_added $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:87
                                      • #<Class:0x007f5bf94def48>.remove_possible_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:3
                                        • Module#method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                        • Module#private_method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                      • Module#define_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:110
                                        • Module#method_added $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:110
                                      • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:118
                                      • #<Class:0x007f5bf94def48>.remove_possible_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:3
                                        • Module#method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                        • Module#private_method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                      • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:119
                                      • Module#define_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:119
                                        • Module#method_added $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:119
                                      • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:123
                                      • #<Class:0x007f5bf94def48>.remove_possible_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:3
                                        • Module#method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                        • Module#private_method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                      • Module#attr_writer $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:124
                                        • Module#method_added $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:124
                                • #<Class:0x007f5bf94def48>.default_url_options= -> block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:87
                                  • #<Class:0x007f5bf94def48>.block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:87
                                    • Kernel#singleton_class $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:88
                                    • Module#class_eval $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:88
                                      • #<Class:#<Class:0x007f5bf94def48>>.block (3 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:88
                                        • #<Class:#<Class:0x007f5bf94def48>>.remove_possible_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:3
                                          • Module#method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                                          • Module#undef_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:5
                                            • BasicObject#singleton_method_undefined $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:5
                                        • Module#define_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                          • BasicObject#singleton_method_added $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                    • Module#singleton_class? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:93
                                • Kernel#respond_to? $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/url_for.rb:101
                                • #<Class:0x007f5bf94def48>._url_for_modules $GemPath0/gems/actionview-5.1.2/lib/action_view/helpers/url_helper.rb:25
                                • Module#include(ActionView::RoutingUrlFor) $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/url_for.rb:101
                                  • Module#append_features(ActionView::RoutingUrlFor) $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/url_for.rb:101
                                  • Module#included $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/url_for.rb:101
                          • ActionDispatch::Routing::UrlFor.included $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:124
                            • Kernel#nil? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:125
                            • Module#included $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:130
                    • Module#append_features(#<Module:0x007f5bf920dd50>) $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:118
                    • Module#const_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:119
                    • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:120
                    • Module#class_eval $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:120
                      • #<Class:0x007f5bf94def48>.block (2 levels) in url_helpers $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:551
                        • Kernel#singleton_class $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:552
                        • #<Class:#<Class:0x007f5bf94def48>>.redefine_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:18
                          • #<Class:#<Class:0x007f5bf94def48>>.method_visibility $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:25
                            • Module#private_method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:27
                            • Module#protected_method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:29
                          • #<Class:#<Class:0x007f5bf94def48>>.remove_possible_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:3
                            • Module#method_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:4
                            • Module#undef_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:5
                              • BasicObject#singleton_method_undefined $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:5
                          • Module#define_method $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:21
                            • BasicObject#singleton_method_added $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:21
                          • Module#public $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/remove_method.rb:22
                  • #<Module:0x007f5bf920dd50>.included $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:124
                    • Kernel#nil? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:125
                    • Module#included $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:130
                • ActionDispatch::Routing::RouteSet#mounted_helpers $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/route_set.rb:453
                • Module#include(#<Class:0x007f5bf94def48>) $GemPath0/gems/actionview-5.1.2/lib/action_view/rendering.rb:45
                  • ActionDispatch::Routing::RouteSet::MountedHelpers.append_features(#<Class:0x007f5bf94def48>) $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:111
                    • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:112
                    • Module#< $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:116
                    • Array#each $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:117
                      • ActionDispatch::Routing::RouteSet::MountedHelpers.block in append_features $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:117
                        • Module#include(#<Class:0x007f5bf94def48>) $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:117
                          • ActionDispatch::Routing::UrlFor.append_features(#<Class:0x007f5bf94def48>) $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:111
                            • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:112
                            • Module#< $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:116
                          • ActionDispatch::Routing::UrlFor.included $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:124
                            • Kernel#nil? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:125
                            • Module#included $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:130
                    • Module#append_features(ActionDispatch::Routing::RouteSet::MountedHelpers) $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:118
                    • Module#const_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:119
                    • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:120
                  • ActionDispatch::Routing::RouteSet::MountedHelpers.included $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:124
                    • Kernel#nil? $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:125
                    • Module#included $GemPath0/gems/activesupport-5.1.2/lib/active_support/concern.rb:130
                • Module#include(#<Module:0x007f5bfa11a280>) $GemPath0/gems/actionview-5.1.2/lib/action_view/rendering.rb:49
                  • Module#append_features(#<Module:0x007f5bfa11a280>) $GemPath0/gems/actionview-5.1.2/lib/action_view/rendering.rb:49
                  • Module#included $GemPath0/gems/actionview-5.1.2/lib/action_view/rendering.rb:49
      • StudentsController#view_renderer $GemPath0/gems/actionview-5.1.2/lib/action_view/rendering.rb:77
        • Object#require $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:290
          • Object#load_dependency $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:254
            • ActiveSupport::Dependencies.load? $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:329
              • ActiveSupport::Dependencies.mechanism $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
            • ActiveSupport::Dependencies.constant_watch_stack $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
            • ActiveSupport::Dependencies::WatchStack#watching? $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:117
            • Object#block in require $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:292
              • Kernel#require $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:292
                • IO#set_encoding $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:292
                • IO#set_encoding $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:292
                • ActionView.<module:ActionView> $GemPath0/gems/actionview-5.1.2/lib/action_view/renderer/renderer.rb:1
                  • Class#inherited $GemPath0/gems/actionview-5.1.2/lib/action_view/renderer/renderer.rb:11
                  • ActionView::Renderer.<class:Renderer> $GemPath0/gems/actionview-5.1.2/lib/action_view/renderer/renderer.rb:11
                    • Module#attr_accessor $GemPath0/gems/actionview-5.1.2/lib/action_view/renderer/renderer.rb:12
                      • Module#method_added $GemPath0/gems/actionview-5.1.2/lib/action_view/renderer/renderer.rb:12
                      • Module#method_added $GemPath0/gems/actionview-5.1.2/lib/action_view/renderer/renderer.rb:12
                    • Module#method_added $GemPath0/gems/actionview-5.1.2/lib/action_view/renderer/renderer.rb:14
                    • Module#method_added $GemPath0/gems/actionview-5.1.2/lib/action_view/renderer/renderer.rb:19
                    • Module#method_added $GemPath0/gems/actionview-5.1.2/lib/action_view/renderer/renderer.rb:32
                    • Module#method_added $GemPath0/gems/actionview-5.1.2/lib/action_view/renderer/renderer.rb:41
                    • Module#method_added $GemPath0/gems/actionview-5.1.2/lib/action_view/renderer/renderer.rb:46
                    • Module#method_added $GemPath0/gems/actionview-5.1.2/lib/action_view/renderer/renderer.rb:50
        • StudentsController#lookup_context $GemPath0/gems/actionview-5.1.2/lib/action_view/view_paths.rb:40
          • Kernel#class $GemPath0/gems/actionview-5.1.2/lib/action_view/view_paths.rb:42
          • StudentsController._view_paths -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
            • StudentsController.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
          • StudentsController#details_for_lookup $GemPath0/gems/actionview-5.1.2/lib/action_view/view_paths.rb:45
          • StudentsController#_prefixes $GemPath0/gems/actionview-5.1.2/lib/action_view/view_paths.rb:33
            • Kernel#class $GemPath0/gems/actionview-5.1.2/lib/action_view/view_paths.rb:34
            • StudentsController._prefixes $GemPath0/gems/actionview-5.1.2/lib/action_view/view_paths.rb:15
              • Class#superclass $GemPath0/gems/actionview-5.1.2/lib/action_view/view_paths.rb:17
              • StudentsController.local_prefixes $GemPath0/gems/actionview-5.1.2/lib/action_view/view_paths.rb:27
                • StudentsController.controller_path $GemPath0/gems/actionpack-5.1.2/lib/abstract_controller/base.rb:94
                  • StudentsController.anonymous? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/anonymous.rb:25
                    • Module#name $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/anonymous.rb:26
                    • Kernel#nil? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/anonymous.rb:26
              • Class#superclass $GemPath0/gems/actionview-5.1.2/lib/action_view/view_paths.rb:19
              • ApplicationController._prefixes $GemPath0/gems/actionview-5.1.2/lib/action_view/view_paths.rb:15
                • Class#superclass $GemPath0/gems/actionview-5.1.2/lib/action_view/view_paths.rb:17
                • ApplicationController.local_prefixes $GemPath0/gems/actionview-5.1.2/lib/action_view/view_paths.rb:27
                  • ApplicationController.controller_path $GemPath0/gems/actionpack-5.1.2/lib/abstract_controller/base.rb:94
                    • ApplicationController.anonymous? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/anonymous.rb:25
                      • Module#name $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/anonymous.rb:26
                      • Kernel#nil? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/anonymous.rb:26
          • Class#new $GemPath0/gems/actionview-5.1.2/lib/action_view/view_paths.rb:42
            • ActionView::LookupContext#initialize $GemPath0/gems/actionview-5.1.2/lib/action_view/lookup_context.rb:222
              • ActionView::LookupContext#initialize_details $GemPath0/gems/actionview-5.1.2/lib/action_view/lookup_context.rb:236
                • ActionView::LookupContext#registered_details $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:69
                • Array#each $GemPath0/gems/actionview-5.1.2/lib/action_view/lookup_context.rb:237
                  • ActionView::LookupContext#block in initialize_details $GemPath0/gems/actionview-5.1.2/lib/action_view/lookup_context.rb:237
                    • ActionView::LookupContext.block in <class:LookupContext> $GemPath0/gems/actionview-5.1.2/lib/action_view/lookup_context.rb:45
                      • I18n.locale $GemPath0/gems/i18n-0.8.6/lib/i18n.rb:30
                        • I18n.config $GemPath0/gems/i18n-0.8.6/lib/i18n.rb:17
                          • #<Class:Thread>#current $GemPath0/gems/i18n-0.8.6/lib/i18n.rb:18
                          • Thread#[] $GemPath0/gems/i18n-0.8.6/lib/i18n.rb:18
                        • I18n::Config#locale $GemPath0/gems/i18n-0.8.6/lib/i18n/config.rb:7
                          • I18n::Config#default_locale $GemPath0/gems/i18n-0.8.6/lib/i18n/config.rb:28
                      • Kernel#respond_to? $GemPath0/gems/actionview-5.1.2/lib/action_view/lookup_context.rb:47
                      • I18n.default_locale $GemPath0/gems/i18n-0.8.6/lib/i18n.rb:30
                        • I18n.config $GemPath0/gems/i18n-0.8.6/lib/i18n.rb:17
                          • #<Class:Thread>#current $GemPath0/gems/i18n-0.8.6/lib/i18n.rb:18
                          • Thread#[] $GemPath0/gems/i18n-0.8.6/lib/i18n.rb:18
                        • I18n::Config#default_locale $GemPath0/gems/i18n-0.8.6/lib/i18n/config.rb:28
                      • Array#uniq! $GemPath0/gems/actionview-5.1.2/lib/action_view/lookup_context.rb:49
                  • ActionView::LookupContext#block in initialize_details $GemPath0/gems/actionview-5.1.2/lib/action_view/lookup_context.rb:237
                    • ActionView::LookupContext.block in <class:LookupContext> $GemPath0/gems/actionview-5.1.2/lib/action_view/lookup_context.rb:52
                      • ActionView::Base.default_formats $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                  • ActionView::LookupContext#block in initialize_details $GemPath0/gems/actionview-5.1.2/lib/action_view/lookup_context.rb:237
                    • ActionView::LookupContext.block in <class:LookupContext> $GemPath0/gems/actionview-5.1.2/lib/action_view/lookup_context.rb:53
                  • ActionView::LookupContext#block in initialize_details $GemPath0/gems/actionview-5.1.2/lib/action_view/lookup_context.rb:237
                    • ActionView::LookupContext.block in <class:LookupContext> $GemPath0/gems/actionview-5.1.2/lib/action_view/lookup_context.rb:54
                      • ActionView::Template::Handlers.extensions $GemPath0/gems/actionview-5.1.2/lib/action_view/template/handlers.rb:21
                        • Hash#keys $GemPath0/gems/actionview-5.1.2/lib/action_view/template/handlers.rb:22
              • ActionView::LookupContext#view_paths= $GemPath0/gems/actionview-5.1.2/lib/action_view/lookup_context.rb:111
                • Kernel#Array $GemPath0/gems/actionview-5.1.2/lib/action_view/lookup_context.rb:112
                  • ActionView::PathSet#to_ary $GemPath0/gems/actionview-5.1.2/lib/action_view/path_set.rb:25
                    • Kernel#dup $GemPath0/gems/actionview-5.1.2/lib/action_view/path_set.rb:26
                      • Kernel#initialize_dup $GemPath0/gems/actionview-5.1.2/lib/action_view/path_set.rb:26
                        • Array#initialize_copy $GemPath0/gems/actionview-5.1.2/lib/action_view/path_set.rb:26
                • Class#new $GemPath0/gems/actionview-5.1.2/lib/action_view/lookup_context.rb:112
                  • ActionView::PathSet#initialize $GemPath0/gems/actionview-5.1.2/lib/action_view/path_set.rb:16
                    • ActionView::PathSet#typecast $GemPath0/gems/actionview-5.1.2/lib/action_view/path_set.rb:87
                      • Array#map $GemPath0/gems/actionview-5.1.2/lib/action_view/path_set.rb:88
                        • ActionView::PathSet#block in typecast $GemPath0/gems/actionview-5.1.2/lib/action_view/path_set.rb:88
                          • Module#=== $GemPath0/gems/actionview-5.1.2/lib/action_view/path_set.rb:90
                          • Module#=== $GemPath0/gems/actionview-5.1.2/lib/action_view/path_set.rb:90
        • Class#new $GemPath0/gems/actionview-5.1.2/lib/action_view/rendering.rb:78
          • ActionView::Renderer#initialize $GemPath0/gems/actionview-5.1.2/lib/action_view/renderer/renderer.rb:14
      • StudentsController#view_assigns $GemPath0/gems/actionpack-5.1.2/lib/abstract_controller/rendering.rb:67
        • StudentsController#_protected_ivars $GemPath0/gems/actionpack-5.1.2/lib/action_controller/base.rb:260
        • Kernel#instance_variables $GemPath0/gems/actionpack-5.1.2/lib/abstract_controller/rendering.rb:69
        • Array#reject! $GemPath0/gems/actionpack-5.1.2/lib/abstract_controller/rendering.rb:71
          • StudentsController#block in view_assigns $GemPath0/gems/actionpack-5.1.2/lib/abstract_controller/rendering.rb:71
            • Set#include? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:232
          • StudentsController#block in view_assigns $GemPath0/gems/actionpack-5.1.2/lib/abstract_controller/rendering.rb:71
            • Set#include? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:232
          • StudentsController#block in view_assigns $GemPath0/gems/actionpack-5.1.2/lib/abstract_controller/rendering.rb:71
            • Set#include? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:232
          • StudentsController#block in view_assigns $GemPath0/gems/actionpack-5.1.2/lib/abstract_controller/rendering.rb:71
            • Set#include? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:232
          • StudentsController#block in view_assigns $GemPath0/gems/actionpack-5.1.2/lib/abstract_controller/rendering.rb:71
            • Set#include? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:232
          • StudentsController#block in view_assigns $GemPath0/gems/actionpack-5.1.2/lib/abstract_controller/rendering.rb:71
            • Set#include? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:232
          • StudentsController#block in view_assigns $GemPath0/gems/actionpack-5.1.2/lib/abstract_controller/rendering.rb:71
            • Set#include? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:232
        • Enumerable#each_with_object $GemPath0/gems/actionpack-5.1.2/lib/abstract_controller/rendering.rb:72
          • Array#each $GemPath0/gems/actionpack-5.1.2/lib/abstract_controller/rendering.rb:72
      • Class#new $GemPath0/gems/actionview-5.1.2/lib/action_view/rendering.rb:72
        • #<Class:0x007f5bf94def48>#initialize $GemPath0/gems/actionpack-5.1.2/lib/action_dispatch/routing/url_for.rb:104
          • #<Class:0x007f5bf94def48>#initialize $GemPath0/gems/actionview-5.1.2/lib/action_view/base.rb:197
            • Class#new $GemPath0/gems/actionview-5.1.2/lib/action_view/base.rb:198
              • ActiveSupport::InheritableOptions#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:68
                • Kernel#kind_of? $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:69
                • Hash#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:75
            • Kernel#is_a? $GemPath0/gems/actionview-5.1.2/lib/action_view/base.rb:200
            • #<Class:0x007f5bf94def48>#assign $GemPath0/gems/actionview-5.1.2/lib/action_view/base.rb:193
              • Hash#each $GemPath0/gems/actionview-5.1.2/lib/action_view/base.rb:194
            • #<Class:0x007f5bf94def48>#assign_controller $GemPath0/gems/actionview-5.1.2/lib/action_view/helpers/controller_helper.rb:13
              • Kernel#respond_to? $GemPath0/gems/actionview-5.1.2/lib/action_view/helpers/controller_helper.rb:15
              • Kernel#respond_to? $GemPath0/gems/actionview-5.1.2/lib/action_view/helpers/controller_helper.rb:16
              • StudentsController#config $GemPath0/gems/activesupport-5.1.2/lib/active_support/configurable.rb:144
                • Kernel#class $GemPath0/gems/activesupport-5.1.2/lib/active_support/configurable.rb:145
                • StudentsController.config $GemPath0/gems/activesupport-5.1.2/lib/active_support/configurable.rb:28
                  • Kernel#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/configurable.rb:29
                  • Class#superclass $GemPath0/gems/activesupport-5.1.2/lib/active_support/configurable.rb:29
                  • Kernel#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/configurable.rb:29
                  • Class#superclass $GemPath0/gems/activesupport-5.1.2/lib/active_support/configurable.rb:30
                  • ApplicationController.config $GemPath0/gems/activesupport-5.1.2/lib/active_support/configurable.rb:28
                  • #<Class:0x007f5bfb20de48>#inheritable_copy $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:79
                    • Kernel#class $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:80
                    • Class#new $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:80
                      • #<Class:0x007f5bfb20de48>#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:68
                        • Kernel#kind_of? $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:69
                        • Hash#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:71
                • #<Class:0x007f5bfb20de48>#inheritable_copy $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:79
                  • Kernel#class $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:80
                  • Class#new $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:80
                    • #<Class:0x007f5bfb20de48>#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:68
                      • Kernel#kind_of? $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:69
                      • Hash#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:71
              • #<Class:0x007f5bfb20de48>#inheritable_copy $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:79
                • Kernel#class $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:80
                • Class#new $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:80
                  • #<Class:0x007f5bfb20de48>#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:68
                    • Kernel#kind_of? $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:69
                    • Hash#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/ordered_options.rb:71
              • Kernel#respond_to? $GemPath0/gems/actionview-5.1.2/lib/action_view/helpers/controller_helper.rb:17
              • StudentsController#default_form_builder $GemPath0/gems/actionpack-5.1.2/lib/action_controller/form_builder.rb:44
                • Kernel#class $GemPath0/gems/actionpack-5.1.2/lib/action_controller/form_builder.rb:45
                • StudentsController._default_form_builder -> block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:79
                  • StudentsController.block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:79
            • #<Class:0x007f5bf94def48>#_prepare_context $GemPath0/gems/actionview-5.1.2/lib/action_view/context.rb:21
              • Object#require $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:290
                • Object#load_dependency $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:254
                  • ActiveSupport::Dependencies.load? $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:329
                    • ActiveSupport::Dependencies.mechanism $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                  • ActiveSupport::Dependencies.constant_watch_stack $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                  • ActiveSupport::Dependencies::WatchStack#watching? $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:117
                  • Object#block in require $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:292
                    • Kernel#require $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:292
                      • IO#set_encoding $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:292
                      • IO#set_encoding $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:292
                      • Object#require $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:290
                        • Object#load_dependency $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:254
                          • ActiveSupport::Dependencies.load? $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:329
                            • ActiveSupport::Dependencies.mechanism $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                          • ActiveSupport::Dependencies.constant_watch_stack $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                          • ActiveSupport::Dependencies::WatchStack#watching? $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:117
                          • Object#block in require $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:292
                            • Kernel#require $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies.rb:292
                      • ActionView.<module:ActionView> $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:3
                        • Class#inherited $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:4
                        • ActionView::OutputFlow.<class:OutputFlow> $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:4
                          • Module#attr_reader $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:5
                            • Module#method_added $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:5
                          • Module#method_added $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:7
                          • Module#method_added $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:12
                          • Module#method_added $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:17
                          • Module#method_added $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:22
                          • Module#alias_method $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:25
                            • Module#method_added $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:25
                        • Class#inherited $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:28
                        • ActionView::StreamingFlow.<class:StreamingFlow> $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:28
                          • Module#method_added $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:29
                          • Module#method_added $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:41
                          • Module#method_added $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:63
                          • Module#private $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:68
                          • Module#method_added $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:70
              • Class#new $GemPath0/gems/actionview-5.1.2/lib/action_view/context.rb:22
                • ActionView::OutputFlow#initialize $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:7
                  • Class#new $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:8
                    • Hash#initialize $GemPath0/gems/actionview-5.1.2/lib/action_view/flows.rb:8