fireburn@axion ~/ffmpeg $ LD_LIBRARY_PATH=~/dav1d-prefix/lib64/:$LD_LIBRARY_PATH gdb --args ./ffplay ~/test.mp4
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Reading symbols from ./ffplay...
(No debugging symbols found in ./ffplay)
(gdb) start
Function "main" not defined.
Make breakpoint pending on future shared library load? (y or [n]) y
Temporary breakpoint 1 (-qualified main) pending.
Starting program: /home/fireburn/ffmpeg/ffplay /home/fireburn/test.mp4
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
ffplay version N-98518-gba31fdfd7b Copyright (c) 2003-2020 the FFmpeg developers
  built with clang version 10.0.0
  configuration: --enable-libdav1d --cc=clang --cxx=clang++ --extra-cflags='-O3 -pipe -flto=thin -march=native' --extra-cxxflags='-O3 -pipe -flto=thin -march=native' --extra-ldflags='-O3 -pipe -flto=thin -march=native -Wl,-O1 -Wl,--as-needed -fuse-ld=lld -Wl,--thinlto-jobs=8'
  libavutil      56. 55.100 / 56. 55.100
  libavcodec     58. 96.100 / 58. 96.100
  libavformat    58. 48.100 / 58. 48.100
  libavdevice    58. 11.101 / 58. 11.101
  libavfilter     7. 87.100 /  7. 87.100
  libswscale      5.  8.100 /  5.  8.100
  libswresample   3.  8.100 /  3.  8.100
[New Thread 0x7ffff6fd6700 (LWP 1859787)]
[New Thread 0x7fffef13f700 (LWP 1859788)]
[New Thread 0x7fffee93e700 (LWP 1859789)]
[New Thread 0x7fffee13d700 (LWP 1859790)]
[New Thread 0x7fffed93c700 (LWP 1859791)]
[New Thread 0x7fffed11b700 (LWP 1859792)]
[New Thread 0x7fffecdd8700 (LWP 1859793)]
[libdav1d @ 0x7fffc0003ac0] libdav1d 0.7.1
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/fireburn/test.mp4':
  Metadata:
    major_brand     : dash
    minor_version   : 0
    compatible_brands: iso6av01mp41
    creation_time   : 2020-04-10T02:40:48.000000Z
  Duration: 00:05:39.34, start: 0.000000, bitrate: 2145 kb/s
    Stream #0:0(und): Video: av1 (Main) (av01 / 0x31307661), yuv420p(tv, bt709), 1920x1080, 36 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 24k tbc (default)
    Metadata:
      creation_time   : 2020-04-10T02:40:48.000000Z
      handler_name    : ISO Media file produced by Google Inc.
[libdav1d @ 0x7fffc0070a40] libdav1d 0.7.1
[New Thread 0x7fffec517800 (LWP 1859794)]
[New Thread 0x7fffec413800 (LWP 1859795)]
[New Thread 0x7fffec30f800 (LWP 1859796)]
[New Thread 0x7fffec20b800 (LWP 1859797)]
[New Thread 0x7fffc7ffe800 (LWP 1859798)]
[New Thread 0x7fffc7efa800 (LWP 1859799)]
[New Thread 0x7fffc7df6800 (LWP 1859800)]
[New Thread 0x7fffc7cf2800 (LWP 1859801)]
[New Thread 0x7fffc7b2f800 (LWP 1859802)]
[New Thread 0x7fffc7a2b800 (LWP 1859803)]
[New Thread 0x7fffc7927800 (LWP 1859804)]
[New Thread 0x7fffc7823800 (LWP 1859805)]
[New Thread 0x7fffc7660800 (LWP 1859806)]
[New Thread 0x7fffc755c800 (LWP 1859807)]
[New Thread 0x7fffc7458800 (LWP 1859808)]
[New Thread 0x7fffc7354800 (LWP 1859809)]
[New Thread 0x7fffc7251700 (LWP 1859810)]

Thread 15 "dav1d-tile" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffc7df6800 (LWP 1859800)]
0x00007ffff7860702 in dav1d_msac_decode_symbol_adapt16_avx2 () from /home/fireburn/dav1d-prefix/lib64/libdav1d.so.4
(gdb) bt
#0  0x00007ffff7860702 in dav1d_msac_decode_symbol_adapt16_avx2 () from /home/fireburn/dav1d-prefix/lib64/libdav1d.so.4
#1  0x00007ffff7923c7f in decode_coefs () from /home/fireburn/dav1d-prefix/lib64/libdav1d.so.4
#2  0x00007ffff7922e71 in read_coef_tree () from /home/fireburn/dav1d-prefix/lib64/libdav1d.so.4
#3  0x00007ffff792219a in dav1d_read_coef_blocks_8bpc () from /home/fireburn/dav1d-prefix/lib64/libdav1d.so.4
#4  0x00007ffff78d7b09 in decode_b () from /home/fireburn/dav1d-prefix/lib64/libdav1d.so.4
#5  0x00007ffff78caba8 in decode_sb () from /home/fireburn/dav1d-prefix/lib64/libdav1d.so.4
#6  0x00007ffff78cae0b in decode_sb () from /home/fireburn/dav1d-prefix/lib64/libdav1d.so.4
#7  0x00007ffff78cae2a in decode_sb () from /home/fireburn/dav1d-prefix/lib64/libdav1d.so.4
#8  0x00007ffff78ca7b4 in dav1d_decode_tile_sbrow () from /home/fireburn/dav1d-prefix/lib64/libdav1d.so.4
#9  0x00007ffff795efc8 in dav1d_tile_task () from /home/fireburn/dav1d-prefix/lib64/libdav1d.so.4
#10 0x00007ffff7807137 in start_thread () from /lib64/libpthread.so.0
#11 0x00007ffff7736f8f in clone () from /lib64/libc.so.6