Bug 604190

Created attachment 424188 [details]
File: backtrace

Thanks for the bug report.

The only reference for 'pychess' was that the core was generated by pychess, but nothing else...

Can you tell, how this can be reproduced?

I'm *guessing* at a python bug, if this is indeed a pychess one, please reassign again :)

Dave, do you have any idea, what this could be?

(As a reference bug #605458 is as strange as this one.)

*** Bug 605458 has been marked as a duplicate of this bug. ***

What's the output of:
   rpm -q python python-debuginfo python-libs

Are you able to reproduce this problem?


Both this and bug 605458 show a backtrace in which a secondary thread fails with this assertion:
    if (s == NULL || !PyString_Check(s))
        Py_FatalError("PyString_InternInPlace: strings only please!");
within a call to 
PyDict_SetItemString(PyObject *v, const char *key, PyObject *item)
{
    PyObject *kv;
    int err;
    kv = PyString_FromString(key);
    if (kv == NULL)
        return -1;
    PyString_InternInPlace(&kv); /* XXX Should we really? */

called from 
  PySys_SetObject (name=0x60b450c "exc_type"
called from:
  set_exc_info

It looks like an exception has been raised by the secondary thread, which causes a Python frame in that thread to exit early, but setting up sys.exc_type for an "except" or "with" clause fails.  It attempts to intern the string "exc_type", but the resulting PyObject is apparently not a string.

Reading through the code, I can't see how this could happen; need a reproducer to figure this out further.

I'm wondering why the backtrace doesn't contain extra debugging information as described in:
  https://fedoraproject.org/wiki/Features/EasierPythonDebugging

Is there any C code in pychess?  I don't see anything specific to pychess in the list of shared libraries in the attached backtrace.

(In reply to comment #4)
> I'm wondering why the backtrace doesn't contain extra debugging information as
> described in:
>   https://fedoraproject.org/wiki/Features/EasierPythonDebugging
> 
> Is there any C code in pychess?  I don't see anything specific to pychess in
> the list of shared libraries in the attached backtrace.    

pychess is completely written in python only. The only C code, that could matter is imported, e.g. pygtk.

Hopefully, the submitter is able to reproduce this...

(Retitling to make it easier to deal with in bug lists)

Are you able to reproduce this problem?  Does it happen repeatably, or does it seem to be random?

I'm not sure what went wrong here; without further information I'm afraid I'm not going to be able to figure this out.

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