Use format_exc instead of format_stack to report the right exception.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2454 71dcc9de-d417-0410-9af5-da40c76e7ee4

tools/matrix

@@ -89,7 +89,7 @@ class MatrixImportBenchmark(BenchmarkRunner):
                 traceback.print_exc()
                 self.error_log += "Import with m=%s, s=%s, r=%s, p=%s:" % (
                     masters, storages, replicas, partitions)
-                self.error_log += "\n%s\n" % ''.join(traceback.format_stack())
+                self.error_log += "\n%s\n" % ''.join(traceback.format_exc())
                 return None
         finally:
             neo.stop()