1export fn foo() void {
 2    defer {
 3        1;
 4    }
 5}
 6
 7// error
 8//
 9// :3:9: error: value of type 'comptime_int' ignored
10// :3:9: note: all non-void values must be used
11// :3:9: note: to discard the value, assign it to '_'