#0  magazine_chain_pop_head (magazine_chunks=<synthetic pointer>) at /build/buildd/glib2.0-2.39.91/./glib/gslice.c:539
  [Error: /build/buildd/glib2.0-2.39.91/./glib/gslice.c was not found in source tree]
#1  magazine_chain_prepare_fields (magazine_chunks=0x7f6a241085d0) at /build/buildd/glib2.0-2.39.91/./glib/gslice.c:620
  [Error: /build/buildd/glib2.0-2.39.91/./glib/gslice.c was not found in source tree]
#2  magazine_cache_push_magazine (ix=42, magazine_chunks=<optimized out>, count=4) at /build/buildd/glib2.0-2.39.91/./glib/gslice.c:691
  [Error: /build/buildd/glib2.0-2.39.91/./glib/gslice.c was not found in source tree]
#3  0x00007f6a71f56231 in thread_memory_magazine2_unload (ix=<optimized out>, tmem=<optimized out>) at /build/buildd/glib2.0-2.39.91/./glib/gslice.c:809
  [Error: /build/buildd/glib2.0-2.39.91/./glib/gslice.c was not found in source tree]
#4  0x00007f6a71f9f929 in g_slice_free1 (mem_size=<optimized out>, mem_block=0x7f6a24108b30) at /build/buildd/glib2.0-2.39.91/./glib/gslice.c:1094
  [Error: /build/buildd/glib2.0-2.39.91/./glib/gslice.c was not found in source tree]
#5  0x00007f6a3a1979f2 in gst_ffmpegviddec_video_frame_free (frame=0x7f6a24108b30, ffmpegdec=0x7f6a0c00d980) at gstavviddec.c:551
  [Error: gstavviddec.c was not found in source tree]
#6  gst_ffmpegviddec_release_buffer (context=0x7f6a0c0c1800, picture=0x7f6a0c120f70) at gstavviddec.c:790
  [Error: gstavviddec.c was not found in source tree]
#7  0x00007f6a393f62ed in ff_thread_get_buffer (avctx=0x7f6a24108de0, f=0x7f6a241085d0) at /build/buildd/libav-9.11/libavcodec/pthread.c:926
  [Error: /build/buildd/libav-9.11/libavcodec/pthread.c was not found in source tree]
#8  0x0000000000000001 in ?? ()
#9  0x00007f6a70b4c260 in GST_CAT_DEFAULT () from /tmp/apport_sandbox_p2TL1k/usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#10 0x0000000000000000 in ?? ()