python2.5 crashed with SIGSEGV in Blt_MakeTransparentWindowExist()

[LCID Fire]

Binary package hint: python2.5

Trying to analyse a chemical struct

ProblemType: Crash
Architecture: amd64
Dependencies:
 libgcc1 1:4.3.3-3ubuntu3
 zlib1g 1:1.2.3.3.dfsg-12ubuntu1
 gcc-4.3-base 4.3.3-3ubuntu3
 findutils 4.4.0-2ubuntu3
 libc6 2.9-0ubuntu9
Disassembly: 0x0:
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/python2.5
Package: python2.5-minimal 2.5.4-0ubuntu1
ProcCmdline: python -m bkchem/bkchem
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: python2.5
StacktraceTop:
 ?? ()
 Blt_MakeTransparentWindowExist ()
 ?? () from /usr/lib/libBLT.2.4.so.8.4
 TclInvokeStringCommand ()
 TclEvalObjvInternal () from /usr/lib/libtcl8.4.so.0
Title: python2.5 crashed with SIGSEGV in Blt_MakeTransparentWindowExist()
Uname: Linux 2.6.28-5-generic x86_64
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Matthias Klose (doko)]

please could you provide a testcase, or give a description how to reproduce this issue?

[Daniel Leidert (dleidert-deactivatedaccount)]

From the very short report I guess the user used: Chemistry > Check Chemistry.

However, the crash seems to happen when the window should appear. There are several reports about such an issue, but it is not reproducible for me and I think, the graphics driver could be involved. Based on the stacktrace it seems to be an issue in tcl or blt (trying to show a hidden? window?). Not sure. But it doesn't look like a bug in bkchem. But I can't say this for sure!

[Daniel Leidert (dleidert-deactivatedaccount)]

Duplicate of https://bugs.launchpad.net/ubuntu/+source/bkchem/+bug/380346. Having blt with tcl/tk 8.4 makes this segmentation fault reproducible.