Fix 23497 - Erroneous escape reference to parameter error

[dkorpel]

Supersedes the revert #14677

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Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	23497	regression	Erroneous escape reference to parameter error.

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#14686"

[Geod24]

It's nuts that we have to do this though...

[dkorpel]

I agree, I intend to improve it in future PRs, this is just the quickest path to fix the regression. I've been looking already into fixing returnScope inference without scope, but it breaks Phobos somehow.

[Geod24]

@deadalnix : Care to give this a spin before I merge it, to make sure it fixes the non-reduced problem?

[deadalnix]

I'm unable to run the compiler on the whole project, so this will have to do.

[maxhaton]

crazy but it'll do