[Issue 13575] Unreachable scope(failure) should be warned

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=13575

--- Comment #2 from Witold Baryluk <witold.baryluk+d at gmail.com> ---
Ah, obviously I did forgot to mention that compiler does not warn about my
first example.

But it should.

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