.
Thread 1 (Thread 0x7f2b24ae1740 (LWP 879)):
#0  0x00007f2b2265b227 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:55
        resultvar = 0
        pid = 879
        selftid = 879
#1  0x00007f2b2265ce8a in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x7f2b23655721, sa_sigaction = 0x7f2b23655721}, sa_mask = {__val = {139823238245006, 140720708546624, 1457023630, 94725257099168, 39, 0, 18446744073709551615, 18446744073709551615, 139823253980689, 94725257099168, 0, 94725257088431, 140720708546544, 201863462922, 12884901906, 139823241147968}}, sa_flags = 577326374, sa_restorer = 0x7f2b229eb820 <stderr>}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00005626efec0b09 in ?? ()
No symbol table info available.
#3  0x00007f2b2361248a in isc_assertion_failed () from /usr/lib/x86_64-linux-gnu/libisc.so.160
No symbol table info available.
#4  0x00007f2b23622d42 in isc.mem_destroy () from /usr/lib/x86_64-linux-gnu/libisc.so.160
No symbol table info available.
#5  0x00007f2b23626735 in isc_mem_destroy () from /usr/lib/x86_64-linux-gnu/libisc.so.160
No symbol table info available.
#6  0x00005626efeaf02f in ?? ()
No symbol table info available.
#7  0x00007f2b22646a00 in __libc_start_main (main=0x5626efeaddf0, argc=4, argv=0x7ffc17d87618, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc17d87608) at libc-start.c:289
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 8242321362996473701, 94725233898208, 140720708548112, 0, 0, 2438536251056631653, 2339902258010173285}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x7ffc17d87640, 0x7f2b24b1c188}, data = {prev = 0x0, cleanup = 0x0, canceltype = 400062016}}}
        not_first_call = <optimized out>
#8  0x00005626efeaf309 in ?? ()
No symbol table info available.