gcc/testsuite/gdc.test/fail_compilation/fail10481.d

/*
TEST_OUTPUT:
---
fail_compilation/fail10481.d(11): Error: undefined identifier `T1`, did you mean alias `T0`?
fail_compilation/fail10481.d(15): Error: cannot infer type from template instance get!(A)
---
*/

struct A {}

void get(T0 = T1.Req, Params...)(Params , T1) {}

void main()
{
    auto xxx = get!A;
}