clang-tests/gcc-4_2-testsuite/src/g++.old-deja/g++.jason/overload8.C

// { dg-do assemble  }
// Bug: g++ fails to catch the ambiguity below.

struct A {
  operator int () { return 1; };
  operator int &() { return 1; }; // { dg-error "" } 
};