Issue #8533: Write tracebacks and failed tests to sys.stderr instead of

sys.stdout to avoid UnicodeEncodeError (use backslashreplace error handler)

diff --git a/Lib/test/regrtest.py b/Lib/test/regrtest.py
index c432ca48e8bba060eec8ca82784639e1af4a1fad..ec49b9564c992c0f3e276e256ade3b83f0d8f39a 100755 (executable)
--- a/Lib/test/regrtest.py
+++ b/Lib/test/regrtest.py
@@ -939,8 +939,8 @@ def runtest_inner(test, verbose, quiet,
         print("test", test, "crashed --", str(type) + ":", value)
         sys.stdout.flush()
         if verbose or debug:
-            traceback.print_exc(file=sys.stdout)
-            sys.stdout.flush()
+            traceback.print_exc(file=sys.stderr)
+            sys.stderr.flush()
         return FAILED, test_time
     else:
         if refleak:

diff --git a/Lib/test/support.py b/Lib/test/support.py
index 4ea6c055a7fceb9401021120ce9e624da8baabf9..3c4d5d6bcf24eadda28000352cd5fd8df3831a2e 100644 (file)
--- a/Lib/test/support.py
+++ b/Lib/test/support.py
@@ -1020,7 +1020,7 @@ def check_impl_detail(**guards):
 def _run_suite(suite):
     """Run tests from a unittest.TestSuite-derived class."""
     if verbose:
-        runner = unittest.TextTestRunner(sys.stdout, verbosity=2)
+        runner = unittest.TextTestRunner(sys.stderr, verbosity=2)
     else:
         runner = BasicTestRunner()
 

diff --git a/Misc/NEWS b/Misc/NEWS
index 17702c7b5163f17d87114b69fceffee69a941fb6..f935480417e6da0b9360b162b17624f20f908e63 100644 (file)
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -1198,6 +1198,9 @@ Documentation
 Tests
 -----
 
+- Issue #8533: Write tracebacks and failed tests to sys.stderr instead of
+  sys.stdout to avoid UnicodeEncodeError (use backslashreplace error handler)
+
 - Issue #8576: Remove use of find_unused_port() in test_smtplib and
   test_multiprocessing.  Patch by Paul Moore.