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Fix aliased type support in ImplicitRunInfo #17471

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Fix aliased type support in ImplicitRunInfo #17471

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andrzejressel
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Fixes #17305

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@odersky odersky left a comment

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The current fix like a patch for a problem introduced elsewhere. I think we need to focus on wildApprox instead.

@@ -610,6 +610,8 @@ trait ImplicitRunInfo:
else
partSeen += t
t.dealias match
case dealias if t ne dealias =>
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I don't see any motivation for this code, and without it the change seems unsystematic. There is no wildApprox anywhere else in this function. Why introduce it here?

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I have no idea how to find a better way to put this check. The only thing I've discovered is that this type is not going through wildApprox when I guess it should.

I'll close this MR then.

@andrzejressel
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andrzejressel commented May 14, 2023

bee299e - reverting this also seems to work ...

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assertion failed: wildApprox failed to remove uninstantiated B (should be a type error)
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