tvtime crashed with SIGSEGV in videoinput_get_audio

I don't think it's wise to be showing a CoreDump.gz file in public view...

StacktraceTop:
 videoinput_get_audio (vidin=0x0) at videoinput.c:240
 tvtime_main (rtctimer=0x0, read_stdin=1, realtime=0,
 main (argc=1, argv=0xbfe1a534) at tvtime.c:2751

I'm able to reproduce this bug on a Natty i386 system with tvtime 1.0.2-6.1ubuntu2. It occurs immediately after launching tvtime, though the tvtime window is drawn first. My machine does not actually have a TV tuner--I was only installing and running tvtime in order to find this bug, while looking into some of the issues raised in https://answers.launchpad.net/ubuntu/+source/tvtime/+question/152673. So perhaps the absence of a TV tuner (or a TV tuner that is recognized by the system or by tvtime) is related. I ran tvtime from the Terminal and got this output:

Running tvtime 1.0.2.
Reading configuration from /etc/tvtime/tvtime.xml
I/O warning : failed to load external entity "/home/ek/.tvtime/tvtime.xml"
I/O error : Permission denied
I/O error : Permission denied
Cannot change owner of /home/ek/.tvtime/tvtime.xml: Permission denied.
videoinput: Cannot open capture device /dev/video0: No such file or directory
mixer: find error: Success
mixer: Can't open mixer default, mixer volume and mute unavailable.
mixer: Can't open device default/Line, mixer volume and mute unavailable.
I/O error : Permission denied
I/O error : Permission denied
Segmentation fault (core dumped)

Since duplicates include natty as well as amd64, I'm adding those tags.

By the way, does anybody know why this bug is rated High importance in Ubuntu? Other bugs that seem much more important to Ubuntu have been rated much lower. Does this bug render tvtime totally nonfunctional for all users all of the time, or something?

My impression has been that it would crash all of the time, for a lot of users (including me).
However, it is working for me currently (despite me not using it because of the signal being too weak/bad).

This bug occurs when tuner modules don't load right. For me it was solved when i rearranged tuner-card to second PCI slot

--- tvtime.c.old 2011-06-28 11:02:53.000000000 +0200
+++ tvtime.c 2011-06-28 11:01:31.000000000 +0200
@@ -2071,7 +2071,7 @@
             if( osd ) tvtime_osd_signal_present( osd, 1 );
         } else if( tuner_state == TUNER_STATE_NO_SIGNAL ) {
             if( osd ) tvtime_osd_signal_present( osd, 0 );
- if (videoinput_get_audio(vidin)) {
+ if (vidin && videoinput_get_audio(vidin)) {
                     alsa_join_threaded_loop(videoinput_get_audio(vidin));
                     alsa_close(videoinput_get_audio_p(vidin));
                     videoinput_set_audio(vidin, NULL);

please apply this bugfix asap.

This bug was fixed in the package tvtime - 1.0.2-6.1ubuntu3

---------------
tvtime (1.0.2-6.1ubuntu3) oneiric; urgency=low

  * debian/patches/tvtime-1.0.2-videoinput_get_audio-check-vidin.patch:
    Guard against vidin being NULL, which was causing a crash. Patch
    from Markus Rechberger, thanks! (LP: #509314, #630793)
 -- Daniel T Chen <email address hidden> Wed, 29 Jun 2011 02:03:59 -0600