# HG changeset patch
# User Steve Dower <steve.dower@microsoft.com>
# Date 1424542003 28800
#      Sat Feb 21 10:06:43 2015 -0800
# Node ID 717b0d189b4e3347cc72bb4b89b69919e9e20f9f
# Parent  307713759a622eeb1a96276a7e968a28318cbc8c
Suppress assert dialog in tf_inherit_check

diff --git a/Lib/test/tf_inherit_check.py b/Lib/test/tf_inherit_check.py
--- a/Lib/test/tf_inherit_check.py
+++ b/Lib/test/tf_inherit_check.py
@@ -5,6 +5,26 @@
 import sys
 import os
 
+# Suppress assert dialogs or the failed write may block the test run.
+try:
+    import msvcrt
+except ImportError:
+    pass
+else:
+    msvcrt.SetErrorMode(msvcrt.SEM_FAILCRITICALERRORS|
+                        msvcrt.SEM_NOALIGNMENTFAULTEXCEPT|
+                        msvcrt.SEM_NOGPFAULTERRORBOX|
+                        msvcrt.SEM_NOOPENFILEERRORBOX)
+    try:
+        msvcrt.CrtSetReportMode
+    except AttributeError:
+        # release build
+        pass
+    else:
+        for m in [msvcrt.CRT_WARN, msvcrt.CRT_ERROR, msvcrt.CRT_ASSERT]:
+            msvcrt.CrtSetReportMode(m, msvcrt.CRTDBG_MODE_FILE)
+            msvcrt.CrtSetReportFile(m, msvcrt.CRTDBG_FILE_STDERR)
+
 verbose = (sys.argv[1] == 'v')
 try:
     fd = int(sys.argv[2])