[Issue 16492] support @nogc in debug{} blocks

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=16492

Seb <greensunny12 at gmail.com> changed:

           What    |Removed                     |Added
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           Keywords|                            |pull

--- Comment #5 from Seb <greensunny12 at gmail.com> ---
All it took to do was _one_ line:

https://github.com/dlang/dmd/pull/7882

We could have fixed this a lot earlier...

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