[3.14] gh-133711: Fix test_regrtest for PYTHONUTF8=1 (GH-134839) (#134842)

miss-islington · vstinner · web-flow · commit afb5221b3d4d · 2025-05-28T15:48:03.000Z
gh-133711: Fix test_regrtest for PYTHONUTF8=1 (GH-134839) Use "backslashreplace" error handler to decode stdout and stderr. Example: vstinner@WIN C:\victor\python\main\build\test_python_worker_8360\x91> "C:\victor\python\main\PCbuild\amd64\python_d.exe" -m test --fast-ci --slow-ci --testdir C:\Users\vstinner\AppData\Local\Temp\tmp0t59e8da test_regrtest_noop1 test_regrtest_noop2 test_regrtest_noop3 test_regrtest_noop4 Notice the "\x91" byte at the end of the first line: it's the non-ASCII U+00E6 character encoded to the OEM cp437 code page. (cherry picked from commit 9161827) Co-authored-by: Victor Stinner <vstinner@python.org>
diff --git a/Lib/test/test_regrtest.py b/Lib/test/test_regrtest.py
@@ -874,7 +874,10 @@ def test_script_autotest(self):
         self.run_tests(args)
 
     def run_batch(self, *args):
-        proc = self.run_command(args)
+        proc = self.run_command(args,
+                                # gh-133711: cmd.exe uses the OEM code page
+                                # to display the non-ASCII current directory
+                                errors="backslashreplace")
         self.check_output(proc.stdout)
 
     @unittest.skipUnless(sysconfig.is_python_build(),
