import java.lang.invoke.MethodHandle;

class JavacBug {

private static interface Obj2Obj {

Object run(Object obj) throws Throwable;
}

private static void m(Obj2Obj param) {
}

public static void main(String[] args) {
m((obj) -> {
MethodHandle mhandle = null;
mhandle.invoke(obj);
return null;
});
}
}