Regression with alias parameter matching

[Exil]

On Saturday, 18 May 2019 at 15:18:21 UTC, H. S. Teoh wrote:
> https://issues.dlang.org/show_bug.cgi?id=19884
>
> caused by dmd PR #9769 (fix for bug 9029).
>
> This broke one of my projects in a pretty severe way -- deep 
> down in low-level template mixin code that's very difficult to 
> work around.  :-(
>
>
> T

Looks like it was known it would break code? It broke code in 
Phobos at least.

Pull Request: https://github.com/dlang/dmd/pull/9769