Stack trace with slightly more info as all DBG and source is installed
here.

--- stack trace ---
#0  0x00007f2325ae00bf in __pthread_setaffinity_new (th=<optimized out>, 
cpusetsize=cpusetsize@entry=128, cpuset=cpuset@entry=0x7f2321fe5680) at 
../sysdeps/unix/sysv/linux/pthread_setaffinity.c:34
        __arg2 = 128
        _a3 = 139788870899328
        _a1 = 17325
        resultvar = <optimized out>
        __arg3 = 139788870899328
        __arg1 = 17325
        _a2 = 128
        pd = <optimized out>
        res = <optimized out>
#1  0x00007f23227abd83 in util_queue_thread_func 
(input=input@entry=0x55a59a695bd0) at ../src/util/u_queue.c:252
        cpuset = {__bits = {18446744073709551615 <repeats 16 times>}}
        queue = 0x55a59a8952d0
        thread_index = 0
        __PRETTY_FUNCTION__ = "util_queue_thread_func"
#2  0x00007f23227ab6e7 in impl_thrd_routine (p=<optimized out>) at 
../src/../include/c11/threads_posix.h:87
        pack = {func = 0x7f23227aba70 <util_queue_thread_func>, arg = 
0x55a59a695bd0}
#3  0x00007f2325ad5164 in start_thread (arg=<optimized out>) at 
pthread_create.c:486
        ret = <optimized out>
        pd = <optimized out>
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139788870903552, 
9195723382052266688, 140723610455422, 140723610455423, 0, 139788870899776, 
-9089523756422225216, -9089514281776799040}, mask_was_saved = 0}}, priv = {pad 
= {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
#4  0x00007f23259fddef in clone () at 
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
No locals.
--- source code stack trace ---
#0  0x00007f2325ae00bf in __pthread_setaffinity_new (th=<optimized out>, 
cpusetsize=cpusetsize@entry=128, cpuset=cpuset@entry=0x7f2321fe5680) at 
../sysdeps/unix/sysv/linux/pthread_setaffinity.c:34
  [Error: pthread_setaffinity.c was not found in source tree]
#1  0x00007f23227abd83 in util_queue_thread_func 
(input=input@entry=0x55a59a695bd0) at ../src/util/u_queue.c:252
  [Error: u_queue.c was not found in source tree]
#2  0x00007f23227ab6e7 in impl_thrd_routine (p=<optimized out>) at 
../src/../include/c11/threads_posix.h:87
  [Error: threads_posix.h was not found in source tree]
#3  0x00007f2325ad5164 in start_thread (arg=<optimized out>) at 
pthread_create.c:486
  [Error: pthread_create.c was not found in source tree]
#4  0x00007f23259fddef in clone () at 
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
  [Error: clone.S was not found in source tree]

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https://bugs.launchpad.net/bugs/1815889

Title:
  qemu-system-x86_64 crashed with signal 31 in
  __pthread_setaffinity_new()

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