[Issue 17283] std.experimental.typecons uses private module members

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17283

--- Comment #1 from RazvanN <razvan.nitu1305 at gmail.com> ---
std.experimental.typecons uses private members from std.typecons. Although this
should have resulted in a compiler error, it didn't due to a compiler bug. I
discovered this while trying to fix the aforementioned compiler bug and now
this is blocking [1]

[1] https://github.com/dlang/dmd/pull/6660

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