# Fastlane trainer not executing for Xcode 15 **URL:** \ **Category:** Mobile\ **Tags:** ios, xcode\ **Created:** [August 23, 2023, 3:38pm UTC](https://discuss.circleci.com/t/fastlane-trainer-not-executing-for-xcode-15/49029 "2023-08-23T15:38:04Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![mapierce](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/mapierce/32/33640_2.png) [@mapierce](https://discuss.circleci.com/u/mapierce)\ **Post date:** [August 23, 2023, 3:38pm UTC](https://discuss.circleci.com/t/fastlane-trainer-not-executing-for-xcode-15/49029/1 "2023-08-23T15:38:04Z")
I created an issue on the Fastlane repo, but I’m not fully certain where the problem lies, so I’m cross posting it here. It appears that there’s an issue with Fastlane trainer where it specifically calls out to the `gsub` with the error: ```auto [!] undefined method gsub' for nil:NilClass (NoMethodError) ``` Here’s the lane I’m attempting to run with no modifications from running it with Xcode 14 ```auto desc "Upload test reports" lane :upload_test_reports do trainer end ``` I then simply run `fastlane upload_test_reports` from the command line and you can see the output I get below ```auto [✔] 🚀 +-------------------------------------------+---------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | Used plugins | +-------------------------------------------+---------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | Plugin | Version | Action | +-------------------------------------------+---------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | fastlane-plugin-firebase_app_distribution | 0.7.2 | firebase_app_distribution, firebase_app_distribution_add_testers, firebase_app_distribution_create_group, firebase_app_distribution_delete_group, firebase_app_distribution_get_latest_release, firebase_app_distribution_get_udids, firebase_app_distribution_remove_testers | +-------------------------------------------+---------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ [14:36:41]: ------------------------------ [14:36:41]: --- Step: default_platform --- [14:36:41]: ------------------------------ [14:36:41]: Driving the lane 'ios upload_test_reports' 🚀 [14:36:41]: --------------------- [14:36:41]: --- Step: trainer --- [14:36:41]: --------------------- +------------------------------+-------+ | Summary for trainer 2.214.0 | +------------------------------+-------+ | path | . | | extension | .xml | | fail_build | true | | xcpretty_naming | false | | silent | false | | output_remove_retry_attempts | false | +------------------------------+-------+ +------------------+-------------------------+ | Lane Context | +------------------+-------------------------+ | DEFAULT_PLATFORM | ios | | PLATFORM_NAME | ios | | LANE_NAME | ios upload_test_reports | +------------------+-------------------------+ +------+------------------+-------------+ | fastlane summary | +------+------------------+-------------+ | Step | Action | Time (in s) | +------+------------------+-------------+ | 1 | default_platform | 0 | | 💥 | trainer | 0 | +------+------------------+-------------+ [14:36:41]: fastlane finished with errors Looking for related GitHub issues on fastlane/fastlane... ➡️ sigh repair fails with "undefined method `id' for nil:NilClass (NoMethodError) certificates.map(&:id)" with Apple Distribution certificate type https://github.com/fastlane/fastlane/issues/21295 [open] 2 💬 24 May 2023 ➡️ [supply] added support for refresh tokens as an authentication method https://github.com/fastlane/fastlane/pull/16414 [open] 10 💬 23 May 2020 ➡️ Unable to upload to testflight using Xcode 14 beta https://github.com/fastlane/fastlane/issues/20371 [closed] 150 💬 17 May 2023 and 24 more at: https://github.com/fastlane/fastlane/search?q=undefined%20method%20%60gsub%27%20for%20nil&type=Issues&utf8=✓ 🔗 You can ⌘ + double-click on links to open them directly in your browser. bundler: failed to load command: fastlane (/Users/distiller/project/vendor/bundle/ruby/3.2.0/bin/fastlane) /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/xcresult.rb:395:in `failure_message': [!] undefined method `gsub' for nil:NilClass (NoMethodError) file_path = self.document_location_in_creating_workspace.url.gsub("file://", "") ^^^^^ from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:278:in `block (2 levels) in summaries_to_data' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:244:in `map' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:244:in `block in summaries_to_data' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:236:in `map' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:236:in `summaries_to_data' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:225:in `parse_xcresult' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:105:in `initialize' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:82:in `new' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:82:in `block in auto_convert' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:53:in `each' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:53:in `auto_convert' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/actions/trainer.rb:11:in `run' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/runner.rb:263:in `block (2 levels) in execute_action' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/actions/actions_helper.rb:69:in `execute_action' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/runner.rb:255:in `block in execute_action' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/runner.rb:229:in `chdir' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/runner.rb:229:in `execute_action' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/runner.rb:157:in `trigger_action_by_name' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/fast_file.rb:159:in `method_missing' from Fastfile:30:in `block (2 levels) in parsing_binding' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/lane.rb:33:in `call' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/runner.rb:49:in `block in execute' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/runner.rb:45:in `chdir' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/runner.rb:45:in `execute' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/lane_manager.rb:47:in `cruise_lane' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/command_line_handler.rb:36:in `handle' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/commands_generator.rb:110:in `block (2 levels) in run' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/commander-4.6.0/lib/commander/command.rb:187:in `call' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/commander-4.6.0/lib/commander/command.rb:157:in `run' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/commander-4.6.0/lib/commander/runner.rb:444:in `run_active_command' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane_core/lib/fastlane_core/ui/fastlane_runner.rb:124:in `run!' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/commander-4.6.0/lib/commander/delegates.rb:18:in `run!' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/commands_generator.rb:354:in `run' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/commands_generator.rb:43:in `start' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/cli_tools_distributor.rb:123:in `take_off' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/bin/fastlane:23:in `' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/bin/fastlane:25:in `load' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/bin/fastlane:25:in `' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/cli/exec.rb:58:in `load' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/cli/exec.rb:58:in `kernel_load' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/cli/exec.rb:23:in `run' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/cli.rb:491:in `exec' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/vendor/thor/lib/thor.rb:392:in `dispatch' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/cli.rb:34:in `dispatch' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/vendor/thor/lib/thor/base.rb:485:in `start' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/cli.rb:28:in `start' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/exe/bundle:45:in `block in ' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/friendly_errors.rb:117:in `with_friendly_errors' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/exe/bundle:33:in `' from /Users/distiller/.rbenv/versions/3.2.2/bin/bundle:25:in `load' from /Users/distiller/.rbenv/versions/3.2.2/bin/bundle:25:in `
' /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/xcresult.rb:395:in `failure_message': undefined method `gsub' for nil:NilClass (NoMethodError) file_path = self.document_location_in_creating_workspace.url.gsub("file://", "") ^^^^^ from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:278:in `block (2 levels) in summaries_to_data' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:244:in `map' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:244:in `block in summaries_to_data' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:236:in `map' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:236:in `summaries_to_data' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:225:in `parse_xcresult' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:105:in `initialize' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:82:in `new' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:82:in `block in auto_convert' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:53:in `each' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/trainer/lib/trainer/test_parser.rb:53:in `auto_convert' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/actions/trainer.rb:11:in `run' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/runner.rb:263:in `block (2 levels) in execute_action' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/actions/actions_helper.rb:69:in `execute_action' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/runner.rb:255:in `block in execute_action' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/runner.rb:229:in `chdir' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/runner.rb:229:in `execute_action' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/runner.rb:157:in `trigger_action_by_name' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/fast_file.rb:159:in `method_missing' from Fastfile:30:in `block (2 levels) in parsing_binding' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/lane.rb:33:in `call' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/runner.rb:49:in `block in execute' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/runner.rb:45:in `chdir' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/runner.rb:45:in `execute' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/lane_manager.rb:47:in `cruise_lane' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/command_line_handler.rb:36:in `handle' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/commands_generator.rb:110:in `block (2 levels) in run' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/commander-4.6.0/lib/commander/command.rb:187:in `call' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/commander-4.6.0/lib/commander/command.rb:157:in `run' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/commander-4.6.0/lib/commander/runner.rb:444:in `run_active_command' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane_core/lib/fastlane_core/ui/fastlane_runner.rb:124:in `run!' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/commander-4.6.0/lib/commander/delegates.rb:18:in `run!' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/commands_generator.rb:354:in `run' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/commands_generator.rb:43:in `start' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/fastlane/lib/fastlane/cli_tools_distributor.rb:123:in `take_off' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/gems/fastlane-2.214.0/bin/fastlane:23:in `' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/bin/fastlane:25:in `load' from /Users/distiller/project/vendor/bundle/ruby/3.2.0/bin/fastlane:25:in `' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/cli/exec.rb:58:in `load' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/cli/exec.rb:58:in `kernel_load' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/cli/exec.rb:23:in `run' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/cli.rb:491:in `exec' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/vendor/thor/lib/thor.rb:392:in `dispatch' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/cli.rb:34:in `dispatch' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/vendor/thor/lib/thor/base.rb:485:in `start' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/cli.rb:28:in `start' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/exe/bundle:45:in `block in ' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/lib/bundler/friendly_errors.rb:117:in `with_friendly_errors' from /Users/distiller/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/bundler-2.4.2/exe/bundle:33:in `' from /Users/distiller/.rbenv/versions/3.2.2/bin/bundle:25:in `load' from /Users/distiller/.rbenv/versions/3.2.2/bin/bundle:25:in `
' ``` Like I said, there were not modifications to running this on Xcode 14, so I’m assuming something else is at play here. Pretty lost on this, so any help would be appreciated