Anselm Kruis added the comment:
Hi,
I was faced with a very similar problem also caused by an invalid file
descriptor.
My solution is to set an invalid parameter handler, that does nothing. This
effectively disables Dr. Watson. Perhaps this is a suitable solution for other
users too. And it does not require a patch.
def set_invalid_parameter_handler(flag):
"""
Set the MSVCRT invalid parameter handler.
If flag is True, this function sets an invalid parameter handler,
that does nothing. This effectively disables Dr. Watson.
If flag is an integer number, it must be the address of an
invalid parameter handler function.
If flag is None, this function removes the invalid parameter
handler. This effectively enables Dr. Watson.
The return value is the address of the current handler or None,
if no handler is installed.
Example::
old = set_invalid_parameter_handler(True)
try:
do_something_nasty
finally:
set_invalid_parameter_handler(old)
"""
try:
# get the msvcrt library
import ctypes.util
libc = ctypes.util.find_msvcrt()
if not libc:
# probably not windows
return None
libc = getattr(ctypes.cdll, libc)
siph = libc._set_invalid_parameter_handler
siph.restype = ctypes.c_void_p
siph.argtypes = [ ctypes.c_void_p ]
# now we need a suitable handler.
# The handler must simply return without performing any actions.
# Of course there is none.
# But if we look at the calling convention (cdecl), and
# at the fact, that we don't need the argument values
# we find, that we can call any function, as long as the function
# does not harm. A suitable function is "int abs(abs)".
null_handler = libc.abs
except Exception:
# probably not the correct windows version
return None
if flag is True:
flag = null_handler
return siph(flag)
----------
nosy: +anselm.kruis
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<http://bugs.python.org/issue5773>
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