gcc/testsuite/gdc.test/fail_compilation/diag9635.d

// REQUIRED_ARGS: -m32
/*
TEST_OUTPUT:
---
fail_compilation/diag9635.d(17): Error: need `this` for `i` of type `int`
fail_compilation/diag9635.d(18): Error: need `this` for `foo` of type `pure nothrow @nogc @safe void()`
---
*/

struct Foo
{
    int i;
    void foo()() { }

    static void bar()
    {
        i = 4;
        foo();
    }
}