[Issue 19320] -cov and -O yield variable used before set

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19320

--- Comment #4 from Dlang Bot <dlang-bot at dlang.rocks> ---
@ljmf00 created dlang/phobos pull request #8204 "std.array: workaround for
Issue 19320" mentioning this issue:

- std.array: workaround for Issue 19320

  By adding a asm block with a `nop` instruction to the affected scope,
  the compiler optimizer will give up searching.

https://github.com/dlang/phobos/pull/8204

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