[Regression Script] Fix printing of error diff (#7451)

diff --git a/test/regress/run_regression.py b/test/regress/run_regression.py
index 7b1c5a43f2daaa7605edf076fa5cf98f4de0fd78..edb45e4bd185f1373703faaf45f8c15b7a6b5f89 100755 (executable)
--- a/test/regress/run_regression.py
+++ b/test/regress/run_regression.py
@@ -74,7 +74,7 @@ class Tester:
             print()
             print("Error output difference")
             print("=" * 80)
-            print_diff(error, expected_error)
+            print_diff(error, benchmark_info.expected_error)
             print("=" * 80)
             print()
         elif exit_status != benchmark_info.expected_exit_status: