Fallback to default pattern when note does not belong to project

In commit 020295ff a regex was added to quickly determine if mentionables might be referenced. But this didn't take into account the note might not belong to a project. So when it doesn't belong to a project, assume the default issue tracker is used, and use DEFAULT_PATTERN to check if there are mentionables. Fixes gitlab-org/gitlab-ce#31993

Fallback to default pattern when note does not belong to project
69b10e16 · Toon Claes · 7ea12d80 · 69b10e16
Commit 69b10e16 authored May 09, 2017 by Toon Claes
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mentionable.rb app/models/concerns/mentionable.rb +1 -1

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--- a/app/models/concerns/mentionable.rb
+++ b/app/models/concerns/mentionable.rb
@@ -92,7 +92,7 @@ module Mentionable
  # Uses regex to quickly determine if mentionables might be referenced
  # Allows heavy processing to be skipped
  def matches_cross_reference_regex?
-    reference_pattern = if project.default_issues_tracker?
+    reference_pattern = if !project || project.default_issues_tracker?
                          ReferenceRegexes::DEFAULT_PATTERN
                        else
                          ReferenceRegexes::EXTERNAL_PATTERN