Issue #10762: Guard against invalid/non-supported format string '%f' on Windows. Patch Santoso Wijaya.

1 files changed, 8 insertions, 0 deletions

diff --git a/Lib/test/test_time.py b/Lib/test/test_time.py
index b4d12b4aaf..0f00b1af52 100644
--- a/Lib/test/test_time.py
+++ b/Lib/test/test_time.py
@@ -1,6 +1,7 @@
 from test import test_support
 import time
 import unittest
+import sys
 
 
 class TimeTestCase(unittest.TestCase):
@@ -37,6 +38,13 @@ class TimeTestCase(unittest.TestCase):
             except ValueError:
                 self.fail('conversion specifier: %r failed.' % format)
 
+        # Issue #10762: Guard against invalid/non-supported format string
+        # so that Python don't crash (Windows crashes when the format string
+        # input to [w]strftime is not kosher.
+        if sys.platform.startswith('win'):
+            with self.assertRaises(ValueError):
+                time.strftime('%f')
+
     def test_strftime_bounds_checking(self):
         # Make sure that strftime() checks the bounds of the various parts
         #of the time tuple (0 is valid for *all* values).