[Issue 12885] const union wrongly converts implicitly to mutable

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=12885

Steven Schveighoffer <schveiguy at gmail.com> changed:

           What    |Removed                     |Added
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           Keywords|                            |safe
           Hardware|x86_64                      |All
                 OS|Linux                       |All

--- Comment #8 from Steven Schveighoffer <schveiguy at gmail.com> ---
Also added safe tag.

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