4 fail_compilation/ice13225.d(12): Error: mixin `ice13225.S.M!(function (S __param_0) pure nothrow @nogc @safe => 0)` does not match template declaration `M(T)`
5 fail_compilation/ice13225.d(16): Error: undefined identifier `undefined`
12 mixin M
!((typeof(this)) => 0);
16 mixin M
!(() => undefined
);