[Issue 16665] static assert is only checked after the following dependent type declaration

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=16665

Manu <turkeyman at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|major                       |critical

--- Comment #5 from Manu <turkeyman at gmail.com> ---
I got rid of everything, this is all that's left:

```
static assert(0, "unsupported system");

@system time_t  mktime(scope tm* timeptr);
```

No version's, no imports, nothing... even in this code, here's the compiler's
output:

time.d(20): error : undefined identifier `tm`

Why did it complain about `tm` but not `time_t`?
Why did it completely ignore the static assert?

I'm raising the importance on this bug... it's actually severe.

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