mythtranscode - segfault at end of run

[anonymous]

When running mythtranscode, either from within mytharchive or standalone, the application segfaults at the very end of the run.

Running strace, it appears that it might be due to a double-free (but I'm not sure):

open("/mnt/store/tmp/mytharchive/work/1/newfile.map", O_WRONLY|O_CREAT|O_TRUNC, 0666) = 9
fstat(9, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaab35dc000
write(9, "Type: 9\n0 14\n15 665614\n30 132916"..., 1116) = 1116
close(9)                                = 0
munmap(0x2aaab35dc000, 4096)            = 0
munmap(0x2aaab2fa6000, 1224704)         = 0
munmap(0x2aaab30d1000, 1224704)         = 0
brk(0xd90000)                           = 0xd90000
munmap(0x2aaab31fc000, 3383296)         = 0
munmap(0x2aaab3536000, 679936)          = 0
ioctl(4, FIONREAD, [1])                 = 0
poll([{fd=7, events=POLLIN|POLLPRI}], 1, 0) = 0
write(7, "\1\0\0\0\1", 5)               = 5
shutdown(7, 2 /* send and receive */)   = 0
close(7)                                = 0
poll([{fd=6, events=POLLIN|POLLPRI}], 1, 0) = 0
write(6, "\1\0\0\0\1", 5)               = 5
shutdown(6, 2 /* send and receive */)   = 0
close(6)                                = 0
munmap(0x2aaab22e4000, 2149664)         = 0
munmap(0x3c6d200000, 3607584)           = 0
munmap(0x2aaab2515000, 2306432)         = 0
munmap(0x2aaab2749000, 2194096)         = 0
munmap(0x3c6b400000, 2395424)           = 0
munmap(0x330a200000, 3434264)           = 0
munmap(0x3c6b000000, 2283888)           = 0
munmap(0x3c6a800000, 2694336)           = 0
munmap(0x3309e00000, 2103032)           = 0
munmap(0x2aaab2961000, 2247176)         = 0
munmap(0x3c6ac00000, 2127504)           = 0
munmap(0x330b600000, 2102672)           = 0
munmap(0x2aaab2b86000, 2181896)         = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++

Using svn version 13967, compiled x86_64 for AMD Athlon 64 x2 with --compile-type=debug (same results without the option)

I've attached the output of a gdb run per the "Debugging with gdb" section of the mythtv.org website. Please let me know if I can add anything else useful.

[anonymous]

gdb.txt from debug run

[sphery <mtdean@…>]

Looks like a broken QT (version 3.3.8): ​http://www.gossamer-threads.com/lists/mythtv/dev/257269#257269

[anonymous]

I (the initiator of this ticket) can confirm that this is indeed the problem, and that the patch mentioned in the above thread does in fact correct the issue for me (using Fedora 7). Thanks for the quick reply!

[stuartm]

The QT app destructor bug again. Fixed by Tolltech in QT 3.3.9