gcc/testsuite/gdc.test/fail_compilation/fail319.d

/*
TEST_OUTPUT:
---
fail_compilation/fail319.d(13): Error: template instance fail319.f!(int, int) does not match template declaration f(T...)() if (T.length > 20)
---
*/

void f(T...)() if (T.length > 20)
{}

void main()
{
    f!(int, int)();
}