[Demonstration 1]

[Buggy Method]
private boolean ReadPair(BagObject bagObject) {
    // <Pair> ::= <String> : <Value>
    String key = ReadString();
    if ((key.length() > 0) && Expect(':')) {
        Object value = ReadValue();
        if (value != null) {
            // special case for "null"
            if (!((value instanceof String) && (((String) value).equalsIgnoreCase("null")))) {
                bagObject.put(key, value);
            }
            return true;
        }
    }
    // this will only happen if we are reconstructing from invalid source
    return false;
}

[Buggy Hunk]
if ((key.length () > 0) && Expect(':')) {

[Patch]
if ((key != null) && (key.length () > 0) && Expect(':')) {

[Demonstration 2]

[Buggy Method]
public static Page parse(final Reader in) throws ParseException, IOException {
    return parse(in, new ParserConstants());
}

[Buggy Hunk]
return parse(in, new ParserConstants());

[Patch]
return parse(in, new ParserConstants(),true);