python dbus Introspect() causes server to core

Simon McVittie simon.mcvittie at
Wed Jan 10 05:48:51 PST 2007

On Tue, 09 Jan 2007 at 13:26:48 -0600, tsuraan wrote:
> I'm running with python 2.4.3, dbus-1.0.1, and dbus-python-0.71 from the
> Gentoo repositories.

Any special/experimental CFLAGS? (Sorry, I have to ask, it's Gentoo :-)

> (gdb) bt
> #0  0xb7ceda93 in strlen () from /lib/
> #1  0xb7e32365 in PyString_FromString () from /usr/lib/
> #2  0xb7b90b3e in ?? ()
>   from /usr/lib/python2.4/site-packages/dbus/
> #3  0x00000000 in ?? ()
> I'll be digging into this for a bit, but just in case, is Introspection on
> python-based dbus servers known to fail?

No, it's meant to work, and 0.71 seems OK on Python 2.4 (doesn't compile
on 2.5, though). Can you get a backtrace with debug symbols, at least
for dbus_bindings (which is part of dbus-python) and preferably for Python
too? "bt full" with debug symbols available would be ideal. You seem to
have some stack smashing there that wiped out frame 3, though, so the
backtrace might not be entirely trustworthy...

I'm hoping to release a new version of dbus-python soon, in which the C
part (dbus_bindings) has been rewritten, so you're unlikely to encounter
the same bug in the new version (although *other* bugs remain possible).
If you're happy with running pre-release code, there are some
release candidate versions available (see list archives) if you want to
try it out.


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