ports/188133: www/firefox coredumps when rewinding HTML5 video content provided by multimedia/gstreamer1-libav

[Wolfgang Jenkner]

The following reply was made to PR ports/188133; it has been noted by GNATS.

From: Wolfgang Jenkner <wjenkner at inode.at>
To: bug-followup at FreeBSD.org,jakub_lach at mailplus.pl
Cc:  
Subject: Re: ports/188133: www/firefox coredumps when rewinding HTML5 video content provided by multimedia/gstreamer1-libav
Date: Fri, 18 Apr 2014 21:46:24 +0200

 I got a coredump now as well, but it's the first time that firefox
 28.0,1 crashed since I installed it almost a month ago.
 
 Here's a backtrace (produced by the base gdb) of what seems to be the
 relevant thread.
 
 For comparison purposes, gdb762 from ports misses frames #4-#18 while
 lldb does show frames #6-#17 (with the same arguments) plus an inlined
 call to gst_single_queue_push_one (with arguments `unavailable') between
 frame #12 and #13 below but also misses #4 and #5.
 
 Note that the backtrace is similar to
 
 https://bugzilla.gnome.org/show_bug.cgi?id=726835
 
 [1 ~]$ gdb /usr/local/lib/firefox/firefox firefox.core
 *** output flushed ***
 (gdb) bt
 #0  thr_kill () at thr_kill.S:3
 #1  0x0000000803c1f045 in nsProfileLock::FatalSignalHandler () from /usr/local/lib/firefox/libxul.so
 #2  0x0000000800f45587 in handle_signal (actp=<value optimized out>, sig=11, info=0x7ffff881f370, 
     ucp=0x7ffff881f000) at /usr/src/lib/libthr/thread/thr_sig.c:238
 #3  0x0000000800f4512f in thr_sighandler (sig=<value optimized out>, info=<value optimized out>, 
     _ucp=<value optimized out>) at /usr/src/lib/libthr/thread/thr_sig.c:183
 #4  <signal handler called>
 #5  0x0000000822d6ab5f in gst_mini_object_replace (olddata=0x40, newdata=0x0) at gstminiobject.c:497
 #6  0x000000082a3f2917 in .text () from /usr/local/lib/gstreamer-1.0/libgstlibav.so
 #7  0x000000082a3f1692 in .text () from /usr/local/lib/gstreamer-1.0/libgstlibav.so
 #8  0x000000082367c86c in gst_video_decoder_decode_frame (decoder=0x81cde4680, frame=0x81c38cce0)
     at gstvideodecoder.c:2832
 #9  0x0000000823680198 in gst_video_decoder_chain_forward (decoder=0x81cde4680, buf=<value optimized out>, 
     at_eos=0) at gstvideodecoder.c:1757
 #10 0x000000082367e372 in gst_video_decoder_chain (pad=<value optimized out>, parent=0x81cde4680, 
     buf=0x820fbd940) at gstvideodecoder.c:2037
 #11 0x0000000822d71e1e in gst_pad_chain_data_unchecked (pad=0x82438a350, type=<value optimized out>, 
     data=<value optimized out>) at gstpad.c:3760
 #12 0x0000000822d7264b in gst_pad_push_data (pad=0x82438a120, type=4112, data=<value optimized out>)
     at gstpad.c:3990
 #13 0x00000008298ca19c in gst_multi_queue_loop (pad=<value optimized out>) at gstmultiqueue.c:1089
 #14 0x0000000822d9d6e9 in gst_task_func (task=0x82522cef0) at gsttask.c:316
 #15 0x000000080dda8fb2 in g_thread_pool_get_max_idle_time () from /usr/local/lib/libglib-2.0.so.0
 ---Type <return> to continue, or q <return> to quit---
 #16 0x000000080dda80fa in g_thread_proxy () from /usr/local/lib/libglib-2.0.so.0
 #17 0x0000000800f404e5 in thread_start (curthread=0x826bef800) at /usr/src/lib/libthr/thread/thr_create.c:284
 #18 0x00007ffff8620000 in ?? ()
 Cannot access memory at address 0x7ffff8820000
 Current language:  auto; currently asm
 (gdb)