[mythtv-users] backend segfault when re-entering livetv - fixes/0.28 with IPTV tuners

[Mike Bibbings]

On 29/11/16 14:04, Mark Perkins wrote:
> Hi all.
>
> I am building a new fixes/0.28 backend. I am testing using IPTV tuners.
> However I am getting a backend segfault if I exit and then re-enter livetv.
> It doesn't seem to happen while channel surfing. It also doesn't seem to
> happen when I exit livetv (or enter the first time), but occurs as soon as I
> try to return to livetv.
>
> I even tried starting, going to livetv, exiting livetv, watching a
> recording, exiting recording, going back into livetv and still pulled a
> segfault as soon as I tried to get into livetv the second time.
>
> I have run a gdb dump and have attached it here
> https://www.dropbox.com/s/ynmtlwpven2lkfs/gdb.txt?dl=0
>
> If anyone has any suggestions please let me know.
>
> Mythbackend version as follows:
> Please attach all output as a file in bug reports.
> MythTV Version : v0.28-97-ge9d0543
> MythTV Branch : fixes/0.28
> Network Protocol : 88
> Library API : 0.28.20161120-1
> QT Version : 5.6.1
> Options compiled in:
>   linux profile use_hidesyms using_alsa using_oss using_pulse
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> using_bindings_php using_dvb using_frontend using_hdhomerun using_vbox
> using_ceton using_hdpvr using_ivtv using_joystick_menu using_libcrypto
> using_libdns_sd using_libfftw3 using_libxml2 using_lirc using_mheg
> using_opengl using_opengl_video using_opengl_themepainter using_qtwebkit
> using_qtscript using_qtdbus using_sdl using_taglib using_v4l2 using_x11
> using_xrandr using_xv using_profiletype using_systemd_notify
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> using_libass using_libxml2
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Which IPTV tuner(s) are you using ?

I know of two mythtv trac tickets #12856 and #12773 (comment 10) - both 
cause mythbackend seg faults in recorders/httptsstreamhandler.cpp:217 in 
the circumstances you describe when using VBOX IPTV tuners. At present 
you will need to patch the source, see the trac tickets for details. If 
you are using HLS Playlists that is going to be a problem as one of the 
patches #12856 breaks those (temporary fix awaiting proper resolution).

Mike