StacktraceTop: __GI___libc_free (mem=0x401) at malloc.c:2966 ?? () __libc_start_main (main=0xf6ba13cd97, argc=1, argv=0x7ffc0fddf5f8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc0fddf5e8) at ../csu/libc-start.c:291 ?? ()
StacktraceTop: f5f8, init=<optimized out>, fini=<optimized out>, rtld_fini= <optimized out>, stack_end= 0x7ffc0fddf5e8) at ../csu/ libc-start. c:291
__GI___libc_free (mem=0x401) at malloc.c:2966
?? ()
__libc_start_main (main=0xf6ba13cd97, argc=1, argv=0x7ffc0fdd
?? ()