Bug 642324 – pycam (media-gfx/pycam-0.6.2)get's SIGSEGV from libglut.so.3 (media-libs/freeglut-3.0.0)

• Product: Gentoo Linux
• Status: RESOLVED NEEDINFO

[Description alex Mezey 2017-12-26 15:33:16 UTC]

pycam crashes at startup:
denkmatte.~: pycam
Enabled 12 parallel local processes
Font directory: /usr/share/pycam/fonts
Segmentation fault

in gdb:
denkmatte.~: gdb /usr/bin/python-exec2c
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Reading symbols from /usr/bin/python-exec2c...(no debugging symbols found)...done.
(gdb) run /usr/bin/pycam
Starting program: /usr/bin/python-exec2c /usr/bin/pycam
process 812 is executing new program: /usr/bin/python2.7
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Enabled 12 parallel local processes
[New Thread 0x7fffe4ae3700 (LWP 820)]
[New Thread 0x7fffdffff700 (LWP 821)]
[New Thread 0x7fffdf7fe700 (LWP 822)]
[New Thread 0x7fffdeffd700 (LWP 823)]
[Thread 0x7fffdf7fe700 (LWP 822) exited]
Font directory: /usr/share/pycam/fonts

Thread 1 "pycam" received signal SIGSEGV, Segmentation fault.
0x00007fffed6fbad0 in fghDrawGeometryWire () from /usr/lib64/libglut.so.3
(gdb) quit
A debugging session is active.

	Inferior 1 [process 812] will be killed.

Quit anyway? (y or n) y


Reproducible: Always

Steps to Reproduce:
1.start pycam
2.
3.
Actual Results:  
crash about a second after startup, window is shortly visible

Expected Results:  
usable program

[Comment 1 Jonas Stein 2018-01-03 21:30:25 UTC]

Thank you for the report. Please *attach* the logfiles,
https://wiki.gentoo.org/wiki/Attach_the_logs_to_the_bug_ticket
and reopen this ticket (Status:unconfirmed).

[Comment 2 alex Mezey 2018-01-04 03:30:27 UTC]

Pycam does not make any logs at startup. It's a runtime Error, not during build. Thats why I posted gdb output. I don't know much about gdb. So I don't even know wether this is a bug in pycam, freeglut or in python 2.7.14-r1
If the bug is in pycam, which is entirely written in python, I should get an error message by the python interpreter instead of a segfault, I guess.
The packages dev-python/pyopengl-3.1.0 and dev-python/pyopengl-accelerate-3.1.0 can contain the bug as they are involved, compiled code and link to the actual opengl libraries.

[Comment 3 Jonas Stein 2018-01-06 18:44:45 UTC]

To me it sounds like a bug in the software provided upstream or a misconfiguration in your system [3].
Does the same source work for you on another distribution?
If it works on other distributions, but not on Gentoo Linux, I suggest to discuss this problem 
on a related mailing list, forum or IRC channel. I have had very good experience on the 
Gentoo IRC [1], of course there are also forums and mailing lists. [2]

I will close this bug here, because I do not see a relation to the gentoo ebuild or the way 
Gentoo handles this special software package. Please provide more information, if I am wrong.

[1] https://www.gentoo.org/get-involved/irc-channels/
[2] https://www.gentoo.org/support/
[3] look up the upstream forums; search in their bug tracker