Red Hat Bugzilla – Bug 404911
'gimmie' crashes caused by python?
Last modified: 2009-07-14 11:07:26 EDT
Description of problem: The latest version of gimmie (an app developed with
python) is very unstable on Fedora, it crashes in a way that's reported (for
gimmie) elsewhere. When I launch the app (run gimmie) from the terminal and try
to reproduce the crash, it dies with the following output;
python: Modules/gcmodule.c:276: visit_decref: Assertion `gc->gc.gc_refs != 0'
I google around for this error message, and it seems to be only reported for
OLPC software run on Fedora, where it was explained to be caused by a problem in
Python's garbage collector (http://dev.laptop.org/ticket/4686).
I've observed the same crash message on both Fedora 8 and rawhide.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
gimmie is OS specific (contains .so as well as python code).
Unless you can reproduce with plain python, I'm unlikely to believe the python
GC is this broken.
valgrind shows a huge number of memory problems.
n/m the valgrind comment, valgrind looks like it's unhappy with the pool
allocator in python ... but I can't see the problem.
*** Bug 408341 has been marked as a duplicate of this bug. ***
See also bug 384221, which looks like a dup of this, but I don't have perms to
mark it as such.
By the way, James, just as a data point- this didn't happen in F7 with the same
version of gimmie, which suggests to me that the problem is probably something
outside of gimmie. No idea if it is python, or pygtk, or what, but it probably
isn't gimmie itself.
*** Bug 384221 has been marked as a duplicate of this bug. ***
From my point of view, if this was a bug in python then the probability of
_just_ gimmie hitting it are very small ... so unless significant evidence is
given my assumption would be that it's gimmie at fault.
As another point of reference I just checked out the latest from CVS
gimmie-0.2.8 and it seems to work fine (the 0.2.7 version wouldn't even display
anything before it crashed).
Did you check out the 0.2.8 tag, or head? I have not tried head.
(Both 0.2.7 and 0.2.8, from tarballs/rpms, crashed like crazy here on f8; 0.2.7
was fine on F7, 0.2.8 was released after I upgraded to F8.)
I basically did: cvs co gimmie; cd gimmie/F-8; make x86_64; sudo rpm -Uvh ...
Then ran the new version, I've just got it to crash by pressing the "library"
button ... but it actually shows something on screen, and I can bring windows to
the fore using the buttons on the left etc.
I suppose this is the dup. of bug 171809.
Created attachment 302391 [details]
debugging output of the core dumped
maybe the dbg output helps to determine whether it's a gimmie or a python
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