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-rw-r--r--lib/gitlab/gitaly_client/operation_service.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/gitlab/gitaly_client/operation_service.rb b/lib/gitlab/gitaly_client/operation_service.rb
index c7732764880..ae1753ff0ae 100644
--- a/lib/gitlab/gitaly_client/operation_service.rb
+++ b/lib/gitlab/gitaly_client/operation_service.rb
@@ -101,6 +101,7 @@ module Gitlab
request_enum.push(Gitaly::UserMergeBranchRequest.new(apply: true))
branch_update = response_enum.next.branch_update
+ return if branch_update.nil?
raise Gitlab::Git::CommitError.new('failed to apply merge to branch') unless branch_update.commit_id.present?
Gitlab::Git::OperationService::BranchUpdate.from_gitaly(branch_update)