Create a method such as the following:

    public void testReads() {
        System.out.println("testReads");
        assertEquals ("<\\s*[Ll][Ii]\\s*>(.*?)<\\s*/[lL][iI]\\s*>",
listitems.getPatternString());
    }

Now put a 

/*

above that method.  The parser finds the closing */ somewhere inside the regular
expression, and the rest of the file has wavy underlines.

Not sure if it belongs to the Java module or somewhere else, or even for sure
that it's a bug...but it does make commenting tests out painful.