[Issue 19345] std.concurrency does not work with structs of const value type

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19345

berni44 <bugzilla at d-ecke.de> changed:

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--- Comment #2 from berni44 <bugzilla at d-ecke.de> ---
Maybe a duplicate of issue 13930. 

https://issues.dlang.org/show_bug.cgi?id=13930

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