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

#write test.zig {
const Foo = extern struct {
    derp: i32,
};
export fn foo(a: *i32) *Foo {
    return @fieldParentPtr("a", a);
}
#}
#update
#check errors {
test.zig:5:28: error: no field named 'a' in struct 'test.Foo'
test.zig:1:20: note: struct declared here
#}
