vm.c: create break object before clearing GC arena.
Otherwise it possibly cause use-after-free.
MODIFY
src/vm.c
src/vm.c
@@ -2268,9 +2268,9 @@ RETRY_TRY_BLOCK:
}
if (ci->cci > CINFO_NONE) {
ci = cipop(mrb);
+ mrb->exc = (struct RObject*)break_new(mrb, RBREAK_TAG_BREAK, proc, v);
mrb_gc_arena_restore(mrb, ai);
mrb->c->vmexec = FALSE;
- mrb->exc = (struct RObject*)break_new(mrb, RBREAK_TAG_BREAK, proc, v);
mrb->jmp = prev_jmp;
MRB_THROW(prev_jmp);
}

vm.c: create break object before clearing GC arena.

Otherwise it possibly cause use-after-free.