gcc/testsuite/gdc.test/fail_compilation/ice13225.d

/*
TEST_OUTPUT:
---
fail_compilation/ice13225.d(12): Error: mixin ice13225.S.M!(function (S _param_0) => 0) does not match template declaration M(T)
fail_compilation/ice13225.d(16): Error: undefined identifier `undefined`
---
*/
mixin template M(T) {}

struct S
{
    mixin M!((typeof(this)) => 0);
}
struct T
{
    mixin M!(() => undefined);
}