Fix Issue 21850 - [REG2.093] Template inference of pure not working

[BorisCarvajal]

This was wrongly passing the original scope when checking for alias this on parameters.

[dlang-bot]

Thanks for your pull request, @BorisCarvajal!

Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	21850	regression	[REG2.093] Template inference of pure not working

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "stable + dmd#13137"

[thewilsonator]

is this pr based on the head of dlang/stable? if not rebasing might solve the CI failure.

[BorisCarvajal]

is this pr based on the head of dlang/stable? if not rebasing might solve the CI failure.

Yes, look the autotester rerun and now the error is gone.

[kinke]

@BorisCarvajal: This has unfortunately caused/triggered a regression: https://issues.dlang.org/show_bug.cgi?id=22420

[BorisCarvajal]

I also hit this running automem test suit (it seems some tests are disabled by default).
I have an alternative fix ready, gonna push it in a couple of hours.