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-rw-r--r--lib/gitlab/diff/position_tracer.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/gitlab/diff/position_tracer.rb b/lib/gitlab/diff/position_tracer.rb
index c7542a8fabc..e89ff238ec7 100644
--- a/lib/gitlab/diff/position_tracer.rb
+++ b/lib/gitlab/diff/position_tracer.rb
@@ -16,7 +16,7 @@ module Gitlab
end
def trace(old_position)
- return unless old_diff_refs.complete? && new_diff_refs.complete?
+ return unless old_diff_refs&.complete? && new_diff_refs&.complete?
return unless old_position.diff_refs == old_diff_refs
# Suppose we have an MR with source branch `feature` and target branch `master`.