Bugs item #1167262, was opened at 2005-03-21 04:25
Message generated for change (Comment added) made by loewis
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Category: Python Library
Group: Python 2.5
Status: Open
Resolution: None
Priority: 5
Submitted By: Timothy Fitz (timothyfitz)
Assigned to: Nobody/Anonymous (nobody)
Summary: Fails assertion in winsig.c under VC 8.0

Initial Comment:
In 2.4 and current cvs initsignal in signalmodule.c calls 
PyOS_getsig which calls signal with an invalid signal 
number. Under VC 7.1 (and 7.0, and probably before) 
this would return SIG_ERR however under VC 8.0 (beta) 
this causes an assertion failure. 


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>Comment By: Martin v. Löwis (loewis)
Date: 2005-04-02 00:02

Message:
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C99 7.14.1.1/p8 specifies

# If the request can  be  honored,  the  signal  function
# returns  the  value  of  func for the most recent successful
# call to signal for the specified signal sig.   Otherwise,  a
# value  of SIG_ERR is returned and a positive value is stored
# in errno.

So it seems to me that VC8 is in error: the request cannot
be "honored", so it should return SIG_ERR. Until/if VC8 is
released with that bug, I would like to take no action here.
When it is released, we still might consider to ignore it until
say, 8.1 comes along and fixes the bug.

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Comment By: Michael Hudson (mwh)
Date: 2005-03-27 22:59

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Ew.  My first thought is, is that allowed by ANSI C?  I'd guess it's 
undefined behaviour.  It still seems excessively unfriendly -- have you 
reported this to MS?

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