Thread 4 (Thread 0x7ffff3133700 (LWP 13070)):
#0  0x00007ffff7010809 in syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff77d38df in g_cond_wait (cond=0x826f50, mutex=0x826f08) at gthread-posix.c:1397
#2  0x00007ffff7b56ece in gst_task_func (task=0x826ef0 [GstTask]) at ../subprojects/gstreamer/gst/gsttask.c:317
#3  0x00007ffff7b5816a in default_func (tdata=0x7fffe801e500, pool=0x618910 [GstTaskPool]) at ../subprojects/gstreamer/gst/gsttaskpool.c:69
#4  0x00007ffff77b627e in g_thread_pool_thread_proxy (data=<optimized out>) at gthreadpool.c:307
#5  0x00007ffff77b58e5 in g_thread_proxy (data=0x7fffec052f70) at gthread.c:778
#6  0x00007ffff72dc61a in start_thread (arg=0x7ffff3133700) at pthread_create.c:334
#7  0x00007ffff70165fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7ffff3934700 (LWP 13069)):
#0  0x00007ffff7010809 in syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff77d39fa in g_cond_wait_until (cond=cond@entry=0x610388, mutex=mutex@entry=0x610380, end_time=end_time@entry=239414963077) at gthread-posix.c:1444
#2  0x00007ffff7763c19 in g_async_queue_pop_intern_unlocked (queue=0x610380, wait=wait@entry=1, end_time=239414963077) at gasyncqueue.c:422
#3  0x00007ffff7764278 in g_async_queue_timeout_pop_unlocked (queue=<optimized out>, timeout=timeout@entry=500000) at gasyncqueue.c:570
#4  0x00007ffff77b6256 in g_thread_pool_thread_proxy (pool=0x61aa00) at gthreadpool.c:262
#5  0x00007ffff77b6256 in g_thread_pool_thread_proxy (data=<optimized out>) at gthreadpool.c:296
#6  0x00007ffff77b58e5 in g_thread_proxy (data=0x7fffec052e80) at gthread.c:778
#7  0x00007ffff72dc61a in start_thread (arg=0x7ffff3934700) at pthread_create.c:334
#8  0x00007ffff70165fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7ffff434f700 (LWP 13068)):
#0  0x00007ffff779586b in g_logv (breakpoint=1) at gmessages.c:324
#1  0x00007ffff779586b in g_logv (log_domain=0x7ffff7b8caf0 <g_log_domain_gstreamer> "GStreamer", log_level=G_LOG_LEVEL_CRITICAL, format=<optimized out>, args=args@entry=0x7ffff434dcd0) at gmessages.c:1081
#2  0x00007ffff77959df in g_log (log_domain=<optimized out>, log_level=<optimized out>, format=<optimized out>) at gmessages.c:1119
#3  0x00007ffff7b323f7 in gst_poll_write_control (set=0x0) at ../subprojects/gstreamer/gst/gstpoll.c:1659
#4  0x00007ffff7ad0bbb in gst_buffer_pool_init (pool=0x8230f0 [GstBufferPool]) at ../subprojects/gstreamer/gst/gstbufferpool.c:181
#5  0x00007ffff7525ba7 in g_type_create_instance (type=140737085857696) at gtype.c:1868
#6  0x00007ffff7507b7b in g_object_new_internal (class=class@entry=0x7fffe8026290, params=params@entry=0x0, n_params=n_params@entry=0) at gobject.c:1779
#7  0x00007ffff7509461 in g_object_newv (object_type=object_type@entry=140737085857696, n_parameters=n_parameters@entry=0, parameters=parameters@entry=0x0) at gobject.c:1926
#8  0x00007ffff7509d94 in g_object_new (object_type=140737085857696, first_property_name=0x0) at gobject.c:1619
#9  0x00007ffff4caa381 in gst_video_buffer_pool_new () at ../subprojects/gst-plugins-base/gst-libs/gst/video/gstvideopool.c:290
#10 0x00007ffff4c9bff0 in gst_video_decoder_decide_allocation_default (decoder=0x7fffec0685a0 [GstJpegDec], query=0x7fffe8034050) at ../subprojects/gst-plugins-base/gst-libs/gst/video/gstvideodecoder.c:3629
#11 0x00007ffff272ed71 in gst_jpeg_dec_decide_allocation (bdec=0x7fffec0685a0 [GstJpegDec], query=0x7fffe8034050) at ../subprojects/gst-plugins-good/ext/jpeg/gstjpegdec.c:1261
#12 0x00007ffff4c9c55a in gst_video_decoder_negotiate_pool (decoder=0x7fffec0685a0 [GstJpegDec], caps=0x7fffec068050) at ../subprojects/gst-plugins-base/gst-libs/gst/video/gstvideodecoder.c:3714
#13 0x00007ffff4c9cd29 in gst_video_decoder_negotiate_default (decoder=0x7fffec0685a0 [GstJpegDec]) at ../subprojects/gst-plugins-base/gst-libs/gst/video/gstvideodecoder.c:3860
#14 0x00007ffff4c9ce7d in gst_video_decoder_negotiate (decoder=0x7fffec0685a0 [GstJpegDec]) at ../subprojects/gst-plugins-base/gst-libs/gst/video/gstvideodecoder.c:3901
#15 0x00007ffff272dbe2 in gst_jpeg_dec_negotiate (dec=0x7fffec0685a0 [GstJpegDec], width=360, height=236, clrspc=3) at ../subprojects/gst-plugins-good/ext/jpeg/gstjpegdec.c:974
#16 0x00007ffff272e367 in gst_jpeg_dec_handle_frame (bdec=0x7fffec0685a0 [GstJpegDec], frame=0x7fffec020330) at ../subprojects/gst-plugins-good/ext/jpeg/gstjpegdec.c:1092
#17 0x00007ffff4c9b92f in gst_video_decoder_decode_frame (decoder=0x7fffec0685a0 [GstJpegDec], frame=0x7fffec020330) at ../subprojects/gst-plugins-base/gst-libs/gst/video/gstvideodecoder.c:3415
#18 0x00007ffff4c9b321 in gst_video_decoder_have_frame (decoder=0x7fffec0685a0 [GstJpegDec]) at ../subprojects/gst-plugins-base/gst-libs/gst/video/gstvideodecoder.c:3347
#19 0x00007ffff272c26c in gst_jpeg_dec_parse (bdec=0x7fffec0685a0 [GstJpegDec], frame=0x7fffec020330, adapter=0x8265a0 [GstAdapter], at_eos=0) at ../subprojects/gst-plugins-good/ext/jpeg/gstjpegdec.c:463
#20 0x00007ffff4c8ea33 in gst_video_decoder_parse_available (dec=0x7fffec0685a0 [GstJpegDec], at_eos=0, new_buffer=0) at ../subprojects/gst-plugins-base/gst-libs/gst/video/gstvideodecoder.c:881
#21 0x00007ffff4c937d8 in gst_video_decoder_chain_forward (decoder=0x7fffec0685a0 [GstJpegDec], buf=0x7fffec020990, at_eos=0) at ../subprojects/gst-plugins-base/gst-libs/gst/video/gstvideodecoder.c:2157
#22 0x00007ffff4c95a4f in gst_video_decoder_chain (pad=0x7fffe8020b70 [GstPad], parent=0x7fffec0685a0 [GstJpegDec], buf=0x7fffec020990) at ../subprojects/gst-plugins-base/gst-libs/gst/video/gstvideodecoder.c:2455
#23 0x00007ffff7b1c5ea in gst_pad_chain_data_unchecked (pad=0x7fffe8020b70 [GstPad], type=4112, data=0x7fffec020990) at ../subprojects/gstreamer/gst/gstpad.c:4205
#24 0x00007ffff7b1d1b9 in gst_pad_push_data (pad=0x811250 [GstPad], type=4112, data=0x7fffec020990) at ../subprojects/gstreamer/gst/gstpad.c:4457
#25 0x00007ffff7b1d8e1 in gst_pad_push (pad=0x811250 [GstPad], buffer=0x7fffec020990) at ../subprojects/gstreamer/gst/gstpad.c:4576
#26 0x00007ffff56fa23f in gst_single_queue_push_one (mq=0x820560 [GstMultiQueue], sq=0x7fffe8015500, object=0x7fffec020990, allow_drop=0x7ffff434edb4) at ../subprojects/gstreamer/plugins/elements/gstmultiqueue.c:1624
#27 0x00007ffff56fbced in gst_multi_queue_loop (pad=0x811250 [GstPad]) at ../subprojects/gstreamer/plugins/elements/gstmultiqueue.c:1939
#28 0x00007ffff7b56fa5 in gst_task_func (task=0x7fffe80104d0 [GstTask]) at ../subprojects/gstreamer/gst/gsttask.c:332
#29 0x00007ffff7b5816a in default_func (tdata=0x7fffec065020, pool=0x618910 [GstTaskPool]) at ../subprojects/gstreamer/gst/gsttaskpool.c:69
#30 0x00007ffff77b627e in g_thread_pool_thread_proxy (data=<optimized out>) at gthreadpool.c:307
#31 0x00007ffff77b58e5 in g_thread_proxy (data=0x8174a0) at gthread.c:778
#32 0x00007ffff72dc61a in start_thread (arg=0x7ffff434f700) at pthread_create.c:334
#33 0x00007ffff70165fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7ffff7fb8740 (LWP 13064)):
#0  0x00007ffff7ad4efd in gst_bus_source_prepare (source=0x7fffffff77c0, timeout=0x60ddf0) at ../subprojects/gstreamer/gst/gstbus.c:799
#1  0x00007ffff778e72d in g_main_context_prepare (context=context@entry=0x60ddf0, priority=priority@entry=0x7fffffff7840) at gmain.c:3442
#2  0x00007ffff778f0bb in g_main_context_iterate (context=0x60ddf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3820
#3  0x00007ffff778f512 in g_main_loop_run (loop=0x60df30) at gmain.c:4034
#4  0x000000000040134e in decode (state=0x60ddd0, uri=0x7fffffff7ed6 "file:///usr/share/shotwell/icons/shotwell-street.jpg") at ../subprojects/gst-plugins-bad/tools/mosaic_db/main.c:59
#5  0x0000000000401442 in main (ac=2, av=0x7fffffff7a08) at ../subprojects/gst-plugins-bad/tools/mosaic_db/main.c:81

