[Python-bugs-list] [ python-Bugs-472642 ] interpreter crash when import .so fails
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Thu, 18 Oct 2001 23:33:17 -0700
Bugs item #472642, was opened at 2001-10-18 20:42
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Category: Python Interpreter Core
Group: Python 2.2
Status: Open
Resolution: None
Priority: 5
Submitted By: Neal Norwitz (nnorwitz)
Assigned to: Nobody/Anonymous (nobody)
Summary: interpreter crash when import .so fails
Initial Comment:
The python interpreter crashes when import _socket
fails (.so).
This only happens when running purify (on solaris 2.8).
The problem is that dlerror() returns NULL, which is
then
passed to strlen().
Attached is a file with the stack trace which caused
the problem,
and a patch to fix the problem.
Neal
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>Comment By: Martin v. Löwis (loewis)
Date: 2001-10-18 23:33
Message:
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I find it surprising that dlerror returns NULL. According
to dlerror(3DL), it will only return NULL if there was no
error since the last call to dlerror. Since handle is
NULL, there certainly was an error very recently (in the
dlopen), and I cannot see any dlerror call in-between.
In any case, your patch seems to be wrong: the bug is that
dlerror returns NULL when it shouldn't. If we really need
to work around this bug (which I'm not convinced that we
should), then the work-around is to pass a non-null
constant string to PyErr_SetString if dlerror returned
null.
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