test fixing when timestamps enabled

Author: gpshead

Lib/test/test_pdb.py

@@ -9,7 +9,6 @@
 import unittest
 import subprocess
 import textwrap
-import traceback
 import linecache
 import zipapp
 import zipfile
@@ -4102,8 +4101,11 @@ def test_errors_in_command(self):
             'debug doesnotexist',
             'c',
         ])
-        stdout, _ = self.run_pdb_script('pass', commands + '\n')
-        stdout = traceback.strip_exc_timestamps(stdout)
+        stdout, _ = self.run_pdb_script(
+            'pass',
+            commands + '\n',
+            extra_env={'PYTHON_TRACEBACK_TIMESTAMPS':'0'},
+        )
 
         self.assertEqual(stdout.splitlines()[1:], [
             '-> pass',

Lib/traceback.py

@@ -218,7 +218,7 @@ def strip_exc_timestamps(output):
        else:
            pattern = TIMESTAMP_AFTER_EXC_MSG_RE_GROUP.encode()
            empty = b""
-       return re.sub(pattern, empty, output)
+       return re.sub(pattern, empty, output, flags=re.MULTILINE)
    return output