Regression with alias parameter matching

[Petar]

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

D's internal infrastructure (druntime, phobos, tools, dub, ...) + 
the list of projects on BuildKite [0] are the "only" automated 
gatekeepers for breaking changes. Unless a project is added to 
this list, we can't guarantee that there won't be any breaking 
changes, as we have no practical way to ensure that.

The fact that your library broke means that it is particularly 
interesting as apparently it is not covered by this extended test 
suite. If possible, it would be great if you can either:
A) Reduce the part of your code that broke and add it to the dmd 
test suite.
B) Publish the whole or part of your library on GitHub and open a 
pull request to update the BuildKite list [0].

It may sound strange, but this is the only way I can see D 
getting more stable over the years: the more D projects are 
available open-source and the more of them are added to [0], the 
less chance is that a breaking change will go undetected.

P.S. Thanks for testing git HEAD ;)

Cheers,
Petar

[0]: 
https://github.com/dlang/ci/blob/338a692013b9889ceaf2bbc726be94e259ff9708/buildkite.sh#L110