gcc/testsuite/g++.dg/cpp0x/lambda/lambda-deduce-neg.C

// { dg-do compile { target c++11 } }

int main() {
  int i = 0;
  int& r = [&] () { return i; } (); // { dg-error "" "invalid initialization of non-const reference of type .int&. from a temporary of type .int." }

  return 0;
}