bpo-30125: Fix faulthandler.disable() on Windows (#1240)

* bpo-30125: Cleanup faulthandler.c

* Use size_t type for iterators
* Add { ... }

* bpo-30125: Fix faulthandler.disable() on Windows

On Windows, faulthandler.disable() now removes the exception handler
installed by faulthandler.enable().

1 files changed, 12 insertions, 0 deletions

diff --git a/Lib/test/test_faulthandler.py b/Lib/test/test_faulthandler.py
index 28dd5f4..626e245 100644
--- a/Lib/test/test_faulthandler.py
+++ b/Lib/test/test_faulthandler.py
@@ -754,6 +754,18 @@ class FaultHandlerTests(unittest.TestCase):
                 3,
                 name)
 
+    @unittest.skipUnless(MS_WINDOWS, 'specific to Windows')
+    def test_disable_windows_exc_handler(self):
+        code = dedent("""
+            import faulthandler
+            faulthandler.enable()
+            faulthandler.disable()
+            code = faulthandler._EXCEPTION_ACCESS_VIOLATION
+            faulthandler._raise_exception(code)
+        """)
+        output, exitcode = self.get_output(code)
+        self.assertEqual(output, [])
+        self.assertEqual(exitcode, 0xC0000005)
 
 
 if __name__ == "__main__":