Duplicate "usage" entry in AST

[cal101]

The code in the following string leads to a duplicated usage entry in the usage list:

        final String in = "public class Usage {\n"
                + "  public void f() {\n"
                + "    C ca[] = new C[2];\n"
                + "    String s[] = new String[ca.length];\n"
                + "    for (C c : ca) s[0] = c.toString();\n"
                + "  }\n"
                + "}\n";

I looked into the analyzer but could not locate it.