$ ./unittest/mysys/m

y_atomic-t

# N CPUs: 20

1..5

# Testing my_atomic_add32 with 30 threads, 3000 iterations... 

Bail out! Signal 4 thrown

# 5 tests planned,  0 failed,  0 was last executed

Thread 1 "my_atomic-t" received signal SIGILL, Illegal instruction.

__bin_chunk (self=0x10035a230) at src/malloc/malloc.c:452

452     src/malloc/malloc.c: No such file or directory.

(gdb) bt

#0  __bin_chunk (self=0x10035a230) at src/malloc/malloc.c:452

#1  0x000000010001a728 in test_concurrently (

    test=0x1000434e0 "my_atomic_add32", handler=0x10001a354 <test_atomic_add>, 

    n=<optimized out>, m=<optimized out>)

    at /home/ncopa/aports/main/mariadb/src/mariadb-10.3.12/unittest/mysys/thr_template.c:50

#2  0x000000010001a83c in do_tests ()

    at /home/ncopa/aports/main/mariadb/src/mariadb-10.3.12/unittest/mysys/my_atomic-t.c:108

#3  0x000000010001a068 in main (argc=<optimized out>, argv=<optimized out>)

    at /home/ncopa/aports/main/mariadb/src/mariadb-10.3.12/unittest/mysys/thr_template.c:68

(gdb)