* thread #8: tid = 0x16df1, 0x000000010031b1c2 libavutil.55.dylib`av_buffer_unref + 18, name = 'mpv/playback core (OSX)', stop reason = EXC_BAD_ACCESS (code=1, address=0x7)
    frame #0: 0x000000010031b1c2 libavutil.55.dylib`av_buffer_unref + 18
libavutil.55.dylib`av_buffer_unref:
->  0x10031b1c2 <+18>: movq   (%rax), %rbx
    0x10031b1c5 <+21>: movq   %rbx, 0x8(%rsp)
    0x10031b1ca <+26>: callq  0x10032ee00               ; av_freep
    0x10031b1cf <+31>: movl   $0xffffffff, %eax         ; imm = 0xFFFFFFFF
(lldb) bt
* thread #8: tid = 0x16df1, 0x000000010031b1c2 libavutil.55.dylib`av_buffer_unref + 18, name = 'mpv/playback core (OSX)', stop reason = EXC_BAD_ACCESS (code=1, address=0x7)
  * frame #0: 0x000000010031b1c2 libavutil.55.dylib`av_buffer_unref + 18
    frame #1: 0x0000000100326a51 libavutil.55.dylib`av_frame_unref + 177
    frame #2: 0x00000001009c63f6 libavcodec.57.dylib`avcodec_decode_audio4 + 118
    frame #3: 0x00000001009c76d7 libavcodec.57.dylib`___lldb_unnamed_symbol5165$$libavcodec.57.dylib + 135
    frame #4: 0x0000000100007de9 mpv`send_packet(da=0x0000000102f44480, mpkt=0x000000010f834560) + 105 at ad_lavc.c:198 [opt]
    frame #5: 0x000000010000911e mpv`audio_work(da=0x0000000102f44480) + 142 at dec_audio.c:220 [opt]
    frame #6: 0x000000010005747f mpv`fill_audio_out_buffers [inlined] decode_new_frame(ao_c=<unavailable>) + 50 at audio.c:781 [opt]
    frame #7: 0x000000010005744d mpv`fill_audio_out_buffers + 113 at audio.c:819 [opt]
    frame #8: 0x00000001000573dc mpv`fill_audio_out_buffers(mpctx=<unavailable>) + 1964 at audio.c:979 [opt]
    frame #9: 0x0000000100078791 mpv`run_playloop(mpctx=<unavailable>) + 593 at playloop.c:1085 [opt]
    frame #10: 0x000000010006cfb8 mpv`mp_play_files [inlined] play_current_file(mpctx=<unavailable>) + 292 at loadfile.c:1155 [opt]
    frame #11: 0x000000010006ce94 mpv`mp_play_files(mpctx=<unavailable>) + 276 at loadfile.c:1311 [opt]
    frame #12: 0x000000010006f286 mpv`mpv_main(argc=<unavailable>, argv=<unavailable>) + 182 at main.c:493 [opt]
    frame #13: 0x00000001000d404f mpv`playback_thread(ctx_obj=0x00007fff5fbff148) + 47 at macosx_application.m:264 [opt]
    frame #14: 0x00007fff8678f99d libsystem_pthread.dylib`_pthread_body + 131
    frame #15: 0x00007fff8678f91a libsystem_pthread.dylib`_pthread_start + 168
    frame #16: 0x00007fff8678d351 libsystem_pthread.dylib`thread_start + 13