Compiler accepts the following invalid code:
public class Test {
    public static void main( String argv[] ) {
        int i = 0b; // should be compile-time error
        long l = 0BL; // should be compile-time error
    }
}

according to grammar (http://ccc/6860965) this is invalid:
BinaryNumeral:
        0 b BinaryDigits
        0 B BinaryDigits
BinaryDigits:
        BinaryDigit
        BinaryDigit BinaryDigits
BinaryDigit: one of
        0 1

This test will be integrated into jck soon.