RUBY_VM_CLASS_SPECIAL_P  350 proc.c         	!RUBY_VM_CLASS_SPECIAL_P(cfp->lfp[0])) {
RUBY_VM_CLASS_SPECIAL_P  358 proc.c         	    !RUBY_VM_CLASS_SPECIAL_P(cfp->lfp[0])) {
RUBY_VM_CLASS_SPECIAL_P  450 vm.c           	if (!RUBY_VM_CLASS_SPECIAL_P(cfp->lfp[0])) {