Reversed the order of tracebacks when concatenating

python-trio · Sep 18, 2022 · dc35213 · dc35213
1 parent 0f39b3f
commit dc35213
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/trio/_core/_run.py b/trio/_core/_run.py
@@ -135,7 +135,7 @@ def collapse_exception_group(excgroup):
 
     if len(exceptions) == 1:
         exceptions[0].__traceback__ = concat_tb(
-            exceptions[0].__traceback__, excgroup.__traceback__
+            excgroup.__traceback__, exceptions[0].__traceback__
         )
         return exceptions[0]
     elif modified: