gcc/testsuite/g++.old-deja/g++.brendan/init2.C

// { dg-do assemble  }
// GROUPS passed initialization
// this should give an error in require_required_type about not
// being allowed to have an initializer list in an argument list.
int f(int a = {1});// { dg-error "" "" { target { ! c++11 } } }