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-rw-r--r--app/models/merge_request.rb5
1 files changed, 3 insertions, 2 deletions
diff --git a/app/models/merge_request.rb b/app/models/merge_request.rb
index 4624e9d36e9..ed99142902e 100644
--- a/app/models/merge_request.rb
+++ b/app/models/merge_request.rb
@@ -186,8 +186,9 @@ class MergeRequest < ActiveRecord::Base
# This will not be the actual base commit if the target branch was merged into
# the source branch after the merge request was created, but it is good enough
# for the specific purpose of linking to a commit.
- # It is not good enough for use in Gitlab::Git::DiffRefs, which need the
- # true base commit.
+ # It is not good enough for use in `Gitlab::Git::DiffRefs`, which needs the
+ # true base commit, so we can't simply have `#diff_base_commit` fall back on
+ # this method.
def likely_diff_base_commit
first_commit.parent || first_commit
end