https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91185
--- Comment #1 from Dávid Bolvanský <david.bolvansky at gmail dot com> --- (gdb) r bw Starting program: /home/xbolva00/IFJ16/src/ifj16c bw Program received signal SIGSEGV, Segmentation fault. 0x000055555555eac5 in eval (op=0x555555768b80) at interpret.c:37 37 tVar *a = op->offset + frame_stack.top->frame->local; (gdb) disassemble Dump of assembler code for function eval: 0x000055555555eab9 <+0>: test %rdi,%rdi 0x000055555555eabc <+3>: je 0x55555555eaf4 <eval+59> 0x000055555555eabe <+5>: mov 0x205d8b(%rip),%rax # 0x555555764850 <frame_stack> => 0x000055555555eac5 <+12>: mov (%rax),%rsi 0x000055555555eac8 <+15>: mov 0x10(%rdi),%edx 0x000055555555eacb <+18>: movslq %edx,%rax
