[mythtv] free(): invalid pointer: in mythfrontend

[Isaac Richards]

On Saturday 16 September 2006 1:45 pm, Martin Long wrote:
> Hi,
>
> Getting some problems with mythfrontend - this is the latest from the
> .20 branch. Frontend log as below:
>
> Fontconfig warning: line 151: invalid edit binding "same"
> Fontconfig warning: line 157: invalid edit binding "same"
> Fontconfig warning: line 163: invalid edit binding "same"
> Fontconfig error: "conf.d", line 1: no element found
> 2006-09-16 17:55:11.867 Using runtime prefix = /usr
> 2006-09-16 17:55:11.879 DPMS is disabled.
> 2006-09-16 17:55:11.907 New DB connection, total: 1
> 2006-09-16 17:55:11.912 Connected to database 'mythconverg' at host:
> localhost
> 2006-09-16 17:55:11.915 Total desktop dim: 640x480, with 1 screen[s].
> 2006-09-16 17:55:11.920 Using screen 0, 640x480 at 0,0
> 2006-09-16 17:55:12.147 Current Schema Version: 1160
> 2006-09-16 17:55:12.148 mythfrontend version: 0.20.20060828-3
> www.mythtv.org
> 2006-09-16 17:55:12.149 Enabled verbose msgs:  important general
> 2006-09-16 17:55:12.902 Total desktop dim: 640x480, with 1 screen[s].
> 2006-09-16 17:55:12.905 Using screen 0, 640x480 at 0,0
> 2006-09-16 17:55:12.906 Switching to square mode (Iulius)
> *** glibc detected *** free(): invalid pointer: 0xbff2a664 ***
> Aborted
>
>
> I've done some debugging and narrowed it down to the MythMainWindow
> constructor. I'm getting debug output before calling this, but nothing
> inside it, so I'm guessing it's during the initialisation of QWidget,
> here:
>
>
> MythMainWindow::MythMainWindow()
>
>               : QWidget(NULL, "mainWindow")
>
> Anyone have any ideas. This just started happening. I'd been playing
> about with the RT thread priority, then reverted the source back to SVN,
> then this happened.
>
> Obviously I don't have the QWidget source to debug this, but I guess
> that should be my next step.
>
> The only changes I've made are to apply the
> ringBufferSwitchRaceConditionFix.diff patch, and also my own patch to
> increase the font sizes (my TV has VGA). However, I've just confimed,
> I've undone these patches, and compared with SVN, and it still behaves
> the same.
>
> Anyone have any ideas?

gdb?

Isaac