Comment 1 for bug 1777268

hread 7 "scan-thread" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffd8f7c700 (LWP 4914)]
0x00007fffd866a26f in make_cache_block ()
   from /usr/lib/x86_64-linux-gnu/sane/libsane-brother4.so.1
(gdb) where
#0 0x00007fffd866a26f in make_cache_block ()
   from /usr/lib/x86_64-linux-gnu/sane/libsane-brother4.so.1
#1 0x00007fffd866ae04 in read_scanned_data ()
   from /usr/lib/x86_64-linux-gnu/sane/libsane-brother4.so.1
#2 0x00007fffd866355e in PageScan ()
   from /usr/lib/x86_64-linux-gnu/sane/libsane-brother4.so.1
#3 0x00007fffd8673be5 in sane_brother4_read ()
   from /usr/lib/x86_64-linux-gnu/sane/libsane-brother4.so.1
#4 0x000055555557ac04 in ?? ()
#5 0x00007ffff5ff3bb5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6 0x00007ffff53e16ba in start_thread (arg=0x7fffd8f7c700)
    at pthread_create.c:333
#7 0x00007ffff511741d in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109