[mythtv] mythfrontend segfault - press a number watching a recording

[Christian Hack]

Easy to reproduce for me:

Watch a recording from the watch recordings page. Press a number key 0 to 9.
Bang - segfault. Not sure what the numbers should do exactly while playing a
recording but they should crash it of course.

This is watching an original DVB recording which has been transcoded to
MPEG4. Running CVS from about March 28.

Backtrace follows:

[mythtv at mythtv mythtv]$ gdb mythfrontend
GNU gdb Red Hat Linux (5.2.1-4)
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This GDB was configured as "i386-redhat-linux"...
(gdb) run
Starting program: /usr/local/bin/mythfrontend
[New Thread 16384 (LWP 15963)]
2004-04-04 12:00:18 mythfrontend version: 0.15.20040206-1 www.mythtv.org
2004-04-04 12:00:18 Enabled verbose msgs : important general
2004-04-04 12:00:20 Registering Internal as a media playback plugin.
Unable to initialize plugin 'mythgame'.
2004-04-04 12:00:24 Registering MythMusic Media Handler as a media handler
2004-04-04 12:00:41 Connecting to backend server: 10.1.1.11:6543 (try 1 of
5)
2004-04-04 12:00:41 Using protocol version 3
2004-04-04 12:00:41 Using protocol version 3
[New Thread 32769 (LWP 15967)]
[New Thread 16386 (LWP 15968)]
[New Thread 32771 (LWP 15969)]
[New Thread 49156 (LWP 15970)]
[New Thread 65541 (LWP 15971)]
[New Thread 81926 (LWP 15972)]
[New Thread 98311 (LWP 15973)]
[New Thread 114696 (LWP 15974)]
2004-04-04 12:00:56 Opening OSS audio device '/dev/dsp'.
[New Thread 131081 (LWP 15975)]
2004-04-04 12:00:57 Using XV port 103
[New Thread 147466 (LWP 15976)]
2004-04-04 12:00:57 Changing from None to WatchingPreRecorded

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 81926 (LWP 15972)]
0x402271c6 in RemoteEncoder::CheckChannelPrefix(QString, bool&) (this=0x0,
channel=Cannot access memory at address 0x0
) at remoteencoder.cpp:380
380         QStringList strlist = QString("QUERY_RECORDER
%1").arg(recordernum);
(gdb) thread apply all bt full

Thread 11 (Thread 147466 (LWP 15976)):
#0  0x420db1a7 in poll () from /lib/i686/libc.so.6
No symbol table info available.
#1  0x40319a01 in vsync_wait_for_retrace () at vsync.c:223
        polldata = {fd = 21, events = 255, revents = 0}
#2  0x401b9cae in NuppelVideoPlayer::ExAVSync() (this=0x46902f88) at
NuppelVideoPlayer.cpp:1275
        buffer = (VideoFrame_ *) 0x828af58
#3  0x401bb09c in NuppelVideoPlayer::OutputVideoLoop() (this=0x46902f88) at
NuppelVideoPlayer.cpp:1595
        frame = (VideoFrame_ *) 0x828af58
#4  0x401bb1a0 in NuppelVideoPlayer::kickoffOutputVideoLoop(void*)
(player=0x46902f88) at NuppelVideoPlayer.cpp:1667
        nvp = (NuppelVideoPlayer *) 0x46902f88
#5  0x4100f881 in pthread_start_thread () from /lib/i686/libpthread.so.0
No symbol table info available.
#6  0x4100f985 in pthread_start_thread_event () from
/lib/i686/libpthread.so.0
No symbol table info available.

Thread 10 (Thread 131081 (LWP 15975)):
#0  0x420b0226 in nanosleep () from /lib/i686/libc.so.6
No symbol table info available.
#1  0x00000000 in ?? ()
No symbol table info available.

Thread 9 (Thread 114696 (LWP 15974)):
#0  0x420b0226 in nanosleep () from /lib/i686/libc.so.6
No symbol table info available.
#1  0x00000000 in ?? ()
No symbol table info available.

Thread 8 (Thread 98311 (LWP 15973)):
#0  0x41015156 in nanosleep () from /lib/i686/libpthread.so.0
No symbol table info available.
#1  0x00000001 in ?? ()
No symbol table info available.
#2  0x4100e0e9 in pthread_cond_timedwait_relative () from
/lib/i686/libpthread.so.0
No symbol table info available.
#3  0x40e7744b in QWaitCondition::wait(unsigned long) () from
/usr/lib/qt-3.1/lib/libqt-mt.so.3
No symbol table info available.
#4  0x401b7bb6 in NuppelVideoPlayer::GetFrame(int, bool) (this=0x46902f88,
onlyvideo=0, unsafe=false) at NuppelVideoPlayer.cpp:646
No locals.
#5  0x401bbd9b in NuppelVideoPlayer::StartPlaying() (this=0x46902f88) at
NuppelVideoPlayer.cpp:1901
        output_video = 147466
        pausecheck = 0
#6  0x4024d3e2 in SpawnDecode(void*) (param=0x46902f88) at tv_play.cpp:141
        nvp = (NuppelVideoPlayer *) 0x46902f88
#7  0x4100f881 in pthread_start_thread () from /lib/i686/libpthread.so.0
No symbol table info available.
#8  0x4100f985 in pthread_start_thread_event () from
/lib/i686/libpthread.so.0
No symbol table info available.

Thread 7 (Thread 81926 (LWP 15972)):
#0  0x402271c6 in RemoteEncoder::CheckChannelPrefix(QString, bool&)
(this=0x0, channel=Cannot access memory at address 0x0
) at remoteencoder.cpp:380
        strlist = {<QValueList<QString>> = {sh = 0x471ff7f4}, <No data
fields>}
        retval = 70
#1  0x40258964 in TV::ChannelKey(int) (this=0x46900af8, key=3) at
tv_play.cpp:2128
        chan = {static null = Cannot access memory at address 0x0