Handle all YAML parser exceptions in .gitlab-ci.yml (fixes #41209)

- Move the exception handling as close to the source as possible to
avoid leaking Psych ahstraction
- Also remove unnecessary rescue all statement from LintsController.
This should not be necessary anymore since any YAML errors should all be
caught by the #validation_message method.

1 files changed, 1 insertions, 4 deletions

diff --git a/app/controllers/ci/lints_controller.rb b/app/controllers/ci/lints_controller.rb
index be667687c18..e9bd1689a1e 100644
--- a/app/controllers/ci/lints_controller.rb
+++ b/app/controllers/ci/lints_controller.rb
@@ -16,10 +16,7 @@ module Ci
         @builds = @config_processor.builds
         @jobs = @config_processor.jobs
       end
-    rescue
-      @error = 'Undefined error'
-      @status = false
-    ensure
+
       render :show
     end
   end