[Issue 19851] std.concurrency linker errors with -dip1000

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19851

--- Comment #2 from Seb <greeenify at gmail.com> ---
A reduced example: https://issues.dlang.org/show_bug.cgi?id=19857

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