[Issue 12429] SIMD vector type errors are too eager

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=12429

--- Comment #1 from Don <clugdbug at yahoo.com.au> ---
I think you meant is(typeof(MakeVecType!(BaseT, 8)))

is() on its own doesn't suppress error messages.

--