gcc/testsuite/g++.dg/cpp0x/lambda/lambda-capture-const-ref.C

// { dg-do run }
// { dg-options "-std=c++0x" }
#include <cassert>

int main() {
  int i = 1, j = 2;
  const int& ci = i;
  [&ci, &j] () -> void { j = ci; } ();
  assert(i == 1);
  assert(j == 1);
  //[&ci] () -> void { ci = 0; } (); { dg-error: cannot assign to const int& }

  return 0;
}