Mythtv frequently crashes with strange library errors....

[drvik]

Hoping someone can point me in the right direction...

I run a mythtv setup that I compile from the subversion repository... I get occasional errors like below...

[Hu]

I do not see anything in the pasted content that actually tells what happened, beyond that "it crashed." Try to get a core file, or attach gdb (from sys-devel/gdb) to a running instance before you crash it. You will probably want to rebuild at least some of the libraries with debugging symbols (if you haven't already). Do so before you try to catch the core file.

I have had good results using -ggdb -g2 for debugging symbols, but YMMV. Once you have a core file, you can begin to chase why it is crashing. I would start with getting a backtrace at the time of the crash.

In my experience, core files are often of little use without the libraries used by the faulting program. This means that (a) you should try to avoid rebuilding libraries used by Myth between the time that Myth crashes and the time that you analyze the core file and (b) there is not much point posting the core file for someone else to look at, unless someone specifically asks for it.

[drvik]

Thanks Hu,

Interestingly, the problem seems to have fixed itself for the time being... I unmerged all mythtv packages and deleted the svn download directory and rebuilt just the main mythtv without any additional modules.... frustrating since I rebuilt from scratch multiple times prior to posting... maybe cleaning mythvideo/music/dvd etc etc helped??

If you know of a guide for using gdb or generally debugging/fault finding I would love it for future breakdowns....

drvik

[Hu]

For a quick introduction to analysis, see How to get meaningful backtraces in Gentoo. The gdb info pages go into great detail on how to use the debugger itself. Use info gdb to view them.

[drvik]

Great link

Thanks Hu