# Lib/topic\_creator schlägt fehl, wenn das Wort "math" im Thema oder Text vorkommt **URL:** \ **Category:** Bug\ **Created:** [24. Juni 2022 um 14:37 UTC](https://meta.discourse.org/t/lib-topic-creator-fails-when-the-word-math-appears-in-the-topic-title-or-text/231018 "2022-06-24T14:37:40Z")\ **Posts on this page:** 1\ **Showing post:** 1
**Author:** ![PapaBear](https://avatars.discourse-cdn.com/v4/letter/p/ee59a6/32.png) [@PapaBear](https://meta.discourse.org/u/PapaBear)\ **Post date:** [24. Juni 2022 um 14:37 UTC](https://meta.discourse.org/t/lib-topic-creator-fails-when-the-word-math-appears-in-the-topic-title-or-text/231018/1 "2022-06-24T14:37:40Z")
Wenn ich versuche, ein neues Thema mit der Textzeichenfolge „math“ im Titel oder im Thema zu erstellen, erhalte ich ein „500-Fehler“-Pop-up. Es scheint keine Rolle zu spielen, in welcher Kategorie. Wir haben ein Tag „math“, aber der Beispielbeitrag, der den Fehler auslöst, ist nicht getaggt. Wenn jemand einen Beitrag mit einer alternativen Schreibweise wie „m ath“ erstellt, kann der Benutzer zurückgehen und „m ath“ erfolgreich in „math“ ändern. Die Erstellung des Themas scheint der Fehlerpunkt zu sein. Jede Hilfe wäre sehr willkommen. ![Screen Shot 2022-06-24 at 10.24.54 AM](https://global.discourse-cdn.com/meta/original/4X/9/8/8/988536e106e46caac9e532c50417784385f76e8c.png) . Das Fehlerprotokoll meldet: `NoMethodError (undefined method `split’ for nil:NilClass) lib/topic\_creator.rb:184:in `block in setup_tags' lib/topic_creator.rb:183:in `each’ lib/topic\_creator.rb:183:in `setup_tags' lib/topic_creato` Mit einem Backtrace von: ```plaintext lib/topic_creator.rb:184:in `block in setup_tags' lib/topic_creator.rb:183:in `each' lib/topic_creator.rb:183:in `setup_tags' lib/topic_creator.rb:49:in `create' lib/post_creator.rb:506:in `create_topic' lib/post_creator.rb:207:in `block in create' lib/post_creator.rb:402:in `block in transaction' activerecord (7.0.3) lib/active_record/connection_adapters/abstract/transaction.rb:319:in `block in within_new_transaction' activesupport (7.0.3) lib/active_support/concurrency/load_interlock_aware_monitor.rb:25:in `handle_interrupt' activesupport (7.0.3) lib/active_support/concurrency/load_interlock_aware_monitor.rb:25:in `block in synchronize' activesupport (7.0.3) lib/active_support/concurrency/load_interlock_aware_monitor.rb:21:in `handle_interrupt' activesupport (7.0.3) lib/active_support/concurrency/load_interlock_aware_monitor.rb:21:in `synchronize' activerecord (7.0.3) lib/active_record/connection_adapters/abstract/transaction.rb:317:in `within_new_transaction' activerecord (7.0.3) lib/active_record/connection_adapters/abstract/database_statements.rb:316:in `transaction' activerecord (7.0.3) lib/active_record/transactions.rb:209:in `transaction' lib/post_creator.rb:401:in `transaction' lib/post_creator.rb:205:in `create' lib/new_post_manager.rb:285:in `perform_create_post' lib/new_post_manager.rb:223:in `perform' app/controllers/posts_controller.rb:196:in `create' actionpack (7.0.3) lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action' actionpack (7.0.3) lib/abstract_controller/base.rb:215:in `process_action' actionpack (7.0.3) lib/action_controller/metal/rendering.rb:53:in `process_action' actionpack (7.0.3) lib/abstract_controller/callbacks.rb:234:in `block in process_action' activesupport (7.0.3) lib/active_support/callbacks.rb:118:in `block in run_callbacks' app/controllers/application_controller.rb:415:in `block in with_resolved_locale' i18n (1.10.0) lib/i18n.rb:328:in `with_locale' app/controllers/application_controller.rb:415:in `with_resolved_locale' activesupport (7.0.3) lib/active_support/callbacks.rb:127:in `block in run_callbacks' activesupport (7.0.3) lib/active_support/callbacks.rb:138:in `run_callbacks' actionpack (7.0.3) lib/abstract_controller/callbacks.rb:233:in `process_action' actionpack (7.0.3) lib/action_controller/metal/rescue.rb:22:in `process_action' actionpack (7.0.3) lib/action_controller/metal/instrumentation.rb:67:in `block in process_action' activesupport (7.0.3) lib/active_support/notifications.rb:206:in `block in instrument' activesupport (7.0.3) lib/active_support/notifications/instrumenter.rb:24:in `instrument' activesupport (7.0.3) lib/active_support/notifications.rb:206:in `instrument' actionpack (7.0.3) lib/action_controller/metal/instrumentation.rb:66:in `process_action' actionpack (7.0.3) lib/action_controller/metal/params_wrapper.rb:259:in `process_action' activerecord (7.0.3) lib/active_record/railties/controller_runtime.rb:27:in `process_action' actionpack (7.0.3) lib/abstract_controller/base.rb:151:in `process' actionview (7.0.3) lib/action_view/rendering.rb:39:in `process' rack-mini-profiler (3.0.0) lib/mini_profiler/profiling_methods.rb:85:in `block in profile_method' actionpack (7.0.3) lib/action_controller/metal.rb:188:in `dispatch' actionpack (7.0.3) lib/action_controller/metal.rb:251:in `dispatch' actionpack (7.0.3) lib/action_dispatch/routing/route_set.rb:49:in `dispatch' actionpack (7.0.3) lib/action_dispatch/routing/route_set.rb:32:in `serve' actionpack (7.0.3) lib/action_dispatch/journey/router.rb:50:in `block in serve' actionpack (7.0.3) lib/action_dispatch/journey/router.rb:32:in `each' actionpack (7.0.3) lib/action_dispatch/journey/router.rb:32:in `serve' actionpack (7.0.3) lib/action_dispatch/routing/route_set.rb:852:in `call' lib/middleware/omniauth_bypass_middleware.rb:71:in `call' rack (2.2.3.1) lib/rack/tempfile_reaper.rb:15:in `call' rack (2.2.3.1) lib/rack/conditional_get.rb:40:in `call' rack (2.2.3.1) lib/rack/head.rb:12:in `call' actionpack (7.0.3) lib/action_dispatch/http/permissions_policy.rb:38:in `call' lib/content_security_policy/middleware.rb:12:in `call' lib/middleware/anonymous_cache.rb:368:in `call' rack (2.2.3.1) lib/rack/session/abstract/id.rb:266:in `context' rack (2.2.3.1) lib/rack/session/abstract/id.rb:260:in `call' actionpack (7.0.3) lib/action_dispatch/middleware/cookies.rb:697:in `call' actionpack (7.0.3) lib/action_dispatch/middleware/callbacks.rb:27:in `block in call' activesupport (7.0.3) lib/active_support/callbacks.rb:99:in `run_callbacks' actionpack (7.0.3) lib/action_dispatch/middleware/callbacks.rb:26:in `call' actionpack (7.0.3) lib/action_dispatch/middleware/debug_exceptions.rb:28:in `call' actionpack (7.0.3) lib/action_dispatch/middleware/show_exceptions.rb:26:in `call' logster (2.11.2) lib/logster/middleware/reporter.rb:43:in `call' railties (7.0.3) lib/rails/rack/logger.rb:40:in `call_app' railties (7.0.3) lib/rails/rack/logger.rb:27:in `call' config/initializers/100-quiet_logger.rb:23:in `call' config/initializers/100-silence_logger.rb:31:in `call' actionpack (7.0.3) lib/action_dispatch/middleware/remote_ip.rb:93:in `call' actionpack (7.0.3) lib/action_dispatch/middleware/request_id.rb:26:in `call' lib/middleware/enforce_hostname.rb:23:in `call' rack (2.2.3.1) lib/rack/method_override.rb:24:in `call' actionpack (7.0.3) lib/action_dispatch/middleware/executor.rb:14:in `call' rack (2.2.3.1) lib/rack/sendfile.rb:110:in `call' actionpack (7.0.3) lib/action_dispatch/middleware/host_authorization.rb:131:in `call' rack-mini-profiler (3.0.0) lib/mini_profiler/profiler.rb:249:in `call' message_bus (4.2.0) lib/message_bus/rack/middleware.rb:60:in `call' lib/middleware/request_tracker.rb:202:in `call' railties (7.0.3) lib/rails/engine.rb:530:in `call' railties (7.0.3) lib/rails/railtie.rb:226:in `public_send' railties (7.0.3) lib/rails/railtie.rb:226:in `method_missing' rack (2.2.3.1) lib/rack/urlmap.rb:74:in `block in call' rack (2.2.3.1) lib/rack/urlmap.rb:58:in `each' rack (2.2.3.1) lib/rack/urlmap.rb:58:in `call' unicorn (6.1.0) lib/unicorn/http_server.rb:634:in `process_client' unicorn (6.1.0) lib/unicorn/http_server.rb:739:in `worker_loop' unicorn (6.1.0) lib/unicorn/http_server.rb:547:in `spawn_missing_workers' unicorn (6.1.0) lib/unicorn/http_server.rb:143:in `start' unicorn (6.1.0) bin/unicorn:128:in `' vendor/bundle/ruby/2.7.0/bin/unicorn:25:in `load' vendor/bundle/ruby/2.7.0/bin/unicorn:25:in `
' ``` --- _[View the full topic](https://meta.discourse.org/t/lib-topic-creator-fails-when-the-word-math-appears-in-the-topic-title-or-text/231018)._