In https://secure.phabricator.com/P1088 , "aString:" appears to be highlighted as a label, but it's not. It's a variable name followed by the ":" in the java for loop syntax. Interestingly, remarkup highlights this differently and doesn't exhibit the problem (though it doesn't highlight the real label either):
List<String> strings = getStrings(); fail: for (String aString: strings) { if (aString.equals("fail") break fail; System.out.println(aString); }