gcc/testsuite/g++.old-deja/g++.jason/default1.C

// { dg-do assemble  }
// PRMS Id: 5204
// Bug: g++ bashes the type of add_sym with the type of add, so calling it
// with one parameter generates an error.

int add(int const &symbol,
	const unsigned char flags=(void*)0); // { dg-error "" } invalid default arg

int add_sym(int const &symbol,
	    const unsigned char flags=0);

int main()
{
   int fname;
   add_sym(fname);      // Guarantee a symbol exists
}