[Issue 15129] std.parallelism.parallel doesn't enforce shared-correctness

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=15129
Issue 15129 depends on issue 1983, which changed state.

Issue 1983 Summary: Delegates violate const
https://issues.dlang.org/show_bug.cgi?id=1983

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|---                         |WORKSFORME

--