// presence of break with label should pessimize this func
	// (similar to goto).
	panic("bad")
lab1:
	for {
		println("blah")
		if x < 0 {
			break lab1
		}
		panic("hubba")
	}
}

// funcflags.go T_callsexit 268 0 1
// Flags FuncPropNeverReturns
// ParamFlags
//   0 ParamFeedsIfOrSwitch
// <endpropsdump>
// {"Flags":1,"ParamFlags":[32],"ResultFlags":null}