[Issue 7981] immutable structs by default have mutable constructor

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=7981

tyckesak <josipp at live.de> changed:

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
                 CC|                            |josipp at live.de
         Resolution|---                         |WORKSFORME

--- Comment #1 from tyckesak <josipp at live.de> ---
Old bug, probably fixed as a byproduct of some other contribution.
Works for me at least.

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