Backport "Heal member-select on opaque reference" to LTS #21131
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[Cherry-picked 6230405][modified]
Prior to the next commit, I broke up the logic into internal methods, so some can be reused, consuming then in a big Tree#orElse chain. I also took the opportunity to rename the method, to more easily distinguish it from the other typedSelect. [Cherry-picked c477cea][modified]
When the prefix of an opaque isn't the .this reference of the module class, then its RHS isn't visible. TypeComparer uses ctx.owner to "heal" or "lift" this type such that it is. We reuse that logic for member selection. [Cherry-picked 4443395][modified]
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No regressions detected in the community build up to lts-20857. |
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Backports #19730 to the LTS branch.
PR submitted by the release tooling.
[skip ci]