Backport "Avoid crash when superType does not exist after erasure" to LTS #21067
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Fixes #19929 Two main changes: - In TypeErasure, throw a TypeError instead of a FatalError if a supertype of an applied type does not exist. That way, we get a proper error with a position. - Move some catch-and-rethrow logic from ReTyper to TreeChecker. ReTyper alreayd had special exceptions that disabled the logic for all uses of ReTyper except TreeChecker. Unfortunately the ReTyper override also disabled the special TypeError handling in Typer. [Cherry-picked 822e792]
[Cherry-picked 4920146]
[Cherry-picked 16d9e3d]
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No regressions detected in the community build up to lts-20227. |
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Backports #20188 to the LTS branch.
PR submitted by the release tooling.
[skip ci]