RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P  140 vm.c               while (!RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(th, cfp)) {
RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P  158 vm.c               while (!RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(th, cfp)) {
RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P  607 vm.c           	if (RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(th, cfp)) {