[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff78753d5 in malloc_consolidate (
    av=av@entry=0x7ffff7bb5760 <main_arena>) at malloc.c:4165
4165	malloc.c: No such file or directory.