diff options
| -rw-r--r-- | vm_insnhelper.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/vm_insnhelper.c b/vm_insnhelper.c index 2739e2bedf..b69eaf168b 100644 --- a/vm_insnhelper.c +++ b/vm_insnhelper.c @@ -214,6 +214,10 @@ vm_check_canary(const rb_execution_context_t *ec, VALUE *sp) if (! LIKELY(vm_stack_canary_was_born)) { return; /* :FIXME: isn't it rather fatal to enter this branch? */ } + else if ((VALUE *)reg_cfp == ec->vm_stack + ec->vm_stack_size) { + /* This is at the very beginning of a thread. cfp does not exist. */ + return; + } else if (! (iseq = GET_ISEQ())) { return; } |