Assert failure in signal handling

[doomtr666]

BPO	1424017

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2006-02-05.06:31:02.000>
created_at = <Date 2006-02-04.12:50:26.000>
labels = ['OS-windows']
title = 'Assert failure in signal handling'
updated_at = <Date 2006-02-05.06:31:02.000>
user = 'https://bugs.python.org/doomtr666'

bugs.python.org fields:

activity = <Date 2006-02-05.06:31:02.000>
actor = 'nnorwitz'
assignee = 'none'
closed = True
closed_date = None
closer = None
components = ['Windows']
creation = <Date 2006-02-04.12:50:26.000>
creator = 'doomtr666'
dependencies = []
files = []
hgrepos = []
issue_num = 1424017
keywords = []
message_count = 2.0
messages = ['27420', '27421']
nosy_count = 2.0
nosy_names = ['nnorwitz', 'doomtr666']
pr_nums = []
priority = 'normal'
resolution = 'out of date'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue1424017'
versions = ['Python 2.4']

[doomtr666]

With Visual Studio 2005 while compiling in debug mode.
Assert faillure occurs line 1657 in pythonrun.c.

New 2005 debug runtime raise an assert while using
unsupported signals.

Proposed patch :

#else
PyOS_sighandler_t handler;

// handler = signal(sig, SIG_IGN);
handler = SIG_ERR;

if (handler != SIG_ERR)
	signal(sig, handler);
return handler;

#endif

if under visual studio 2005 debug runtime

[nnorwitz]

Logged In: YES
user_id=33168

Python 2.5 fixes this problem, however, the fix was not
backported to 2.4.

See patch 1350409 also bpo-1167262 and bpo-1311784.