[Issue 24565] out contract variable is implicitly const

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24565

timon.gehr at gmx.ch changed:

           What    |Removed                     |Added
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                 CC|                            |timon.gehr at gmx.ch

--- Comment #2 from timon.gehr at gmx.ch ---
FWIW, I would prefer fixing the implementation instead of documenting this
annoying behavior that makes contracts less useful.

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