#vulnerable code 
                                @Test
    public void issue506() throws IOException {
        InputStream is = this.getClass().getResourceAsStream("/com/github/javaparser/SourcesHelperOldVersion.java.txt");
        ParseResult<CompilationUnit> res = new JavaParser().parse(ParseStart.COMPILATION_UNIT, new StreamProvider(is));
        assertTrue(res.getProblems().isEmpty());

        CompilationUnit cu = res.getResult().get();
        getAllNodes(cu).forEach(n -> {
            if (n.getRange() == null) {
                throw new IllegalArgumentException("There should be no node without a range: " + n + " (class: "
                        + n.getClass().getCanonicalName() + ")");
            }
            if (n.getBegin().get().line == 0 && !n.toString().isEmpty() && !(n instanceof ArrayBracketPair)) {
                throw new IllegalArgumentException("There should be no node at line 0: " + n + " (class: "
                        + n.getClass().getCanonicalName() + ")");
            }
        });
    } 
                            #location 4 
                            #vulnerability type RESOURCE_LEAK
#fixed code
                                @Test
    public void issue506() throws IOException {
      ensureAllNodesHaveValidBeginPosition( "SourcesHelperOldVersion.java.txt" );
    }