bt
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#1  0x00007ffff78a2535 in __GI_abort () at abort.c:79
#2  0x00007ffff78f9508 in __libc_message (action=action@entry=do_abort, fmt=fmt@entry=0x7ffff7a0428d "%s\n") at ../sysdeps/posix/libc_fatal.c:181
#3  0x00007ffff78ffc1a in malloc_printerr (str=str@entry=0x7ffff7a063a8 "malloc(): smallbin double linked list corrupted") at malloc.c:5341
#4  0x00007ffff7902fa4 in _int_malloc (av=av@entry=0x7ffff7a3bc40 <main_arena>, bytes=bytes@entry=16) at malloc.c:3640
#5  0x00007ffff790456a in __GI___libc_malloc (bytes=16) at malloc.c:3057
#6  0x00007ffff4bf03ff in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#7  0x00007ffff4bf0a88 in xcb_poll_for_special_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#8  0x00007fffe29e884a in glPrimitiveBoundingBox () from /usr/lib/x86_64-linux-gnu/libGLX_mesa.so.0
#9  0x00007fffe29e8895 in glPrimitiveBoundingBox () from /usr/lib/x86_64-linux-gnu/libGLX_mesa.so.0
#10 0x00007fffe29e9412 in glPrimitiveBoundingBox () from /usr/lib/x86_64-linux-gnu/libGLX_mesa.so.0
#11 0x00007fffe29ea24b in glPrimitiveBoundingBox () from /usr/lib/x86_64-linux-gnu/libGLX_mesa.so.0
#12 0x00007ffff7eb6173 in ?? () from /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#13 0x00005555557188b6 in UpdateScreenExt (rect=0x7fffffffd8c0, with_frame_delay=1) at sdl.c:229
#14 0x00005555557188dd in UpdateScreen_WithFrameDelay (rect=0x7fffffffd8c0) at sdl.c:236
#15 0x0000555555719a75 in SDLCopyArea (src_bitmap=0x555559a92750, dst_bitmap=0x555559a92a20, src_x=0, src_y=0, width=1920, height=40, dst_x=0, dst_y=0, mask_mode=0) at sdl.c:912
#16 0x00005555556f67d6 in sysCopyArea (src_bitmap=0x555559a92750, dst_bitmap=0x555559a92a20, src_x=0, src_y=0, width=1920, height=40, dst_x=0, dst_y=0, mask_mode=0) at system.c:525
#17 0x00005555556f74ac in BlitBitmap (src_bitmap=0x555559a92750, dst_bitmap=0x555559a92a20, src_x=0, src_y=0, width=1920, height=40, dst_x=0, dst_y=0) at system.c:868
#18 0x000055555564cd9e in BackToFront () at tools.c:886
#19 0x0000555555646d88 in EventLoop () at events.c:362
#20 0x000055555563a1ca in main (argc=1, argv=0x7fffffffdae8) at main.c:7762
(gdb) # Had just paused it, NOT doing a tape saving action
(gdb) # Most of the time it seems that it crashes when quickly doing saves, this time it wasn't. I'm pretty sure I wasn't doing a save/restore tape. Just a pause.
