#0  0x00007f03949213a5 in __GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        resultvar = 0
        pid = <optimized out>
        selftid = <optimized out>
#1  0x00007f0394924b0b in __GI_abort () at abort.c:92
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0, sa_sigaction = 0}, sa_mask = {__val = {0 <repeats 16 times>}}, sa_flags = 1855153920, sa_restorer = 0x5}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00000000004912b1 in mono_handle_native_sigsegv (signal=<optimized out>, ctx=<optimized out>) at mini-exceptions.c:2245
        sa = {__sigaction_handler = {sa_handler = 0, sa_sigaction = 0}, sa_mask = {__val = {0 <repeats 16 times>}}, sa_flags = 0, sa_restorer = 0}
        jit_tls = <optimized out>
#3  0x00007f0394c9a040 in _L_unlock_16 () from /tmp/tmpRqQVVZ/lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#4  0x00007f0394c9a045 in _L_unlock_16 () from /tmp/tmpRqQVVZ/lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#5  0x00007f0394c9a034 in _L_unlock_16 () from /tmp/tmpRqQVVZ/lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
Backtrace stopped: previous frame inner to this frame (corrupt stack?)