Backport "Add explanation to checkCaseClassInheritanceInvariant error msg" to LTS #21055
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Closes #18552 which was actually not an error, see: https://github.com/scala/scala3/blob/73882c5b62b8cd96031ad975f7677949433a9f21/compiler/src/dotty/tools/dotc/typer/RefChecks.scala#L889-L893 --------- Co-authored-by: Anna Herlihy <herlihyap@gmail.com> Co-authored-by: Natsu Kagami <natsukagami@gmail.com> [Cherry-picked ed9fecc][modified]
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No regressions detected in the community build up to lts-20227. |
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Backports #20141 to the LTS branch.
PR submitted by the release tooling.
[skip ci]