NoMethodError: undefined method 'map' for nil (NoMethodError)

[ops-handler]

Error

undefined method 'map' for nil (NoMethodError)

    http_files.map do |file|
              ^^^^

Stack trace

app/commands/submission/prepare_http_files.rb:7 in call
mandate/call_injector.rb:10 in Submission::PrepareHttpFiles.call
app/controllers/api/v1/solutions_controller.rb:62 in update
action_controller/metal/basic_implicit_render.rb:6 in send_action
abstract_controller/base.rb:224 in process_action
action_controller/metal/rendering.rb:165 in process_action
abstract_controller/callbacks.rb:259 in block in AbstractController::Callbacks#process_action
active_support/callbacks.rb:121 in block in ActiveSupport::Callbacks#run_callbacks
i18n.rb:353 in with_locale
app/controllers/application_controller.rb:57 in switch_locale!

Tracking Details

• Project: exercism-rails
• Sentry: NoMethodError: undefined method 'map' for nil (NoMethodError)
• Culprit: API::V1::SolutionsController#update
• First seen: May 24, 2026