[Bug 782812] gst_element_factory_make: Program received signal SIGSEGV, Segmentation fault. g_slice_alloc (mem_size=mem_size at entry=368)

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=782812

--- Comment #10 from minfrin at sharp.fm ---
With all debug logging switched off, the crash moves to here:

Caught SIGSEGV
#0  0x76c97ec4 in __libc_waitpid (pid=27266, stat_loc=0x7e9df918, 
#1  0x76cf4ec8 in g_on_error_stack_trace (prg_name=0x1648c "gst-launch-1.0")
#2  0x00012b74 in fault_spin () at gst-launch.c:103
#3  0x00012b38 in fault_handler_sighandler (signum=11) at gst-launch.c:94
#4  <signal handler called>
#5  magazine_chain_pop_head (magazine_chunks=0x11c97b8)
#6  thread_memory_magazine1_alloc (tmem=<optimized out>, ix=45)
#7  g_slice_alloc (mem_size=mem_size at entry=368)
#8  0x76d42174 in g_slice_alloc0 (mem_size=mem_size at entry=368)
#9  0x76e25ccc in g_type_create_instance (type=<optimized out>)
#10 0x76e04ee4 in g_object_new_internal (class=0x11cfad8, 
#11 0x76e07300 in g_object_new_valist (object_type=object_type at entry=20228152, 
#12 0x76e0755c in g_object_new (object_type=20228152, 
#13 0x76ed85e0 in gst_ghost_pad_new_full (name=0x134ccc8 "sink_1", 
#14 0x76ed9068 in gst_ghost_pad_new_no_target_from_template (
#15 0x7611a28c in gst_transcoder_request_new_pad (element=0x132d6c8, 
#16 0x76ec5308 in _gst_element_request_pad (element=0x132d6c8, 
#17 0x76ec5768 in gst_element_request_pad (element=0x132d6c8, templ=0x132bcc8, 
#18 0x76f55fa4 in gst_element_get_pad_from_template (element=0x132d6c8, 
#19 0x76f56168 in gst_element_request_compatible_pad (element=0x132d6c8, 
#20 0x76f575b4 in gst_element_get_compatible_pad (element=0x132d6c8, 
#21 0x76f59844 in gst_element_link_pads_full (src=0x1344780, srcpadname=0x0, 
#22 0x76f5a844 in gst_element_link_pads (src=0x1344780, srcpadname=0x0, 
#23 0x76f5ae08 in gst_element_link_pads_filtered (src=0x1344780, 
#24 0x76f8412c in gst_parse_perform_link (link=0x1341280, graph=0x7e9e03e8)
#25 0x76f898e4 in priv_gst_parse_launch (
#26 0x76f7978c in gst_parse_launch_full (
#27 0x76f795f0 in gst_parse_launchv_full (argv=0x11cdde0, context=0x0, 
#28 0x76f79454 in gst_parse_launchv (argv=0x11cdde0, error=0x7e9e04dc)
#29 0x00015430 in main (argc=39, argv=0x7e9e07c4) at gst-launch.c:1043

Searching for crashes inside magazine_chain_pop_head() we find this crash,
seemingly when gstreamer is used to generate an MPG thumbnail:

https://bugs.launchpad.net/ubuntu/+source/tumbler/+bug/1290041

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