A DESCRIPTION OF THE PROBLEM :
I expect javac -Xlint:-fallthrough to disable fallthrough *and turn on linting*.

javac -Xlint:-fallthrough

does nothing. I must use

javac -Xlint:all,-fallthrough

or

javac -Xlint -Xlint:-fallthrough


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Make a Java file with a switch with fallthrough and another warning that -Xlint should catch. Run

javac -Xlint:-fallthrough Test.java


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The other warning is displayed, lossy-conversion in the example below.
ACTUAL -
Nothing is displayed

---------- BEGIN SOURCE ----------
public class Test {
    public static void main(String[] args) {
         int x = 0;
        x += 3.5;

        switch (x) {
            case 0: x++;
            default: x++;
        }
    }
}
---------- END SOURCE ----------