#zig build-obj {
--name test -fno-emit-bin
-Mroot=test.zig
#}

#write test.zig {
export fn a() void {
    const S = struct {
        fn b() struct { usize, usize } {
            return .{ 0, 0 };
        }
    };
    const c, _ = S.b();
    c += 10;
}
#}
#update
#check errors {
test.zig:8:5: error: cannot assign to constant
#}
