[New-bugs-announce] [issue3313] dlopen() error with no error message from dlerror()

[STINNER Victor]

New submission from STINNER Victor <haypo at users.sourceforge.net>:

Python dl_open() function (from dl module) calls dlopen() and check 
its result: if it's NULL, it's an error. This is correct if I read the 
man page. But with an invalid flag value (-1), dlopen() returns NULL 
but dlerror() also gives a NULL pointer. Example:

>>> import dl
>>> dl.open("/usr/lib/libm.so", -1)
Erreur de segmentation (core dumped)

Workaround: use a static error message if dlerror() returns NULL.

I wrote a patch for dl_open() but other functions (in ctypes module?) 
should also call dlerror().

----------
components: Library (Lib)
files: dl_open.patch
keywords: patch
messages: 69388
nosy: haypo
severity: normal
status: open
title: dlopen() error with no error message from dlerror()
type: crash
versions: Python 2.6
Added file: http://bugs.python.org/file10842/dl_open.patch

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<http://bugs.python.org/issue3313>
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