gcc/testsuite/gdc.test/fail_compilation/failinout1.d - gcc - Git at Google

 inout(int) foo(inout(int) x)
 {
     x = 5;  // cannot modify inout
     return 0;
 }
	inout(int) foo(inout(int) x)
	{
	x = 5; // cannot modify inout
	return 0;
	}