Debug and Release builds of py3k both throw up a Visual Studio debugger prompt when running this test on Windows. I don't have much time at the moment to investigate, but I find it odd that this isn't occurring on the two Windows py3k buildbots.



Output of the release build after selecting not to debug:

C:\python-dev\py3k>PCbuild\amd64\python.exe -m test.regrtest test_capi
test_capi
test test_capi failed -- Traceback (most recent call last):
  File "C:\python-dev\py3k\lib\test\test_capi.py", line 50, in test_no_FatalError_infinite_loop
    b'Fatal Python error:'
AssertionError: b"Fatal Python error: PyThreadState_Get: no current thread\r\n\r
\nThis application has requested the Runtime to terminate it in an unusual way.\
nPlease contact the application's support team for more information." != b'Fatal
 Python error: PyThreadState_Get: no current thread'

1 test failed:
    test_capi