Nested class shadowing in "override" position

[eed3si9n]

Aloha. This is a friendly note that Community Builds has discovered a potential issue you might run into when migrating to Dotty / Scala 3.x.

Ref scala/scala#8705 / scala/bug#8353

steps

Compile using the latest 2.13.x nightly (https://scala-ci.typesafe.com/job/scala-2.13.x-integrate-community-build/3267/) or 2.13.2 when it comes out.

sbt> set ThisBuild/resolvers += "scala-integration" at "https://scala-ci.typesafe.com/artifactory/scala-integration/"
sbt> ++2.13.2-bin-53ba87a!
sbt> compile

problem

Community Builds discovered there are some nested classes in "override" position.

[scala-parallel-collections] [warn] /home/jenkins/workspace/scala-2.13.x-integrate-community-build/target-0.9.16/project-builds/scala-parallel-collections-f822b1c94478b1fe17bb3e1abb55c379b979315e/core/src/main/scala/scala/collection/parallel/ParSeqLike.scala:477:19: shadowing a nested class of a parent is deprecated but trait Accessor shadows trait Accessor defined in trait ParIterableLike; rename the class to something else
[scala-parallel-collections] [warn] /home/jenkins/workspace/scala-2.13.x-integrate-community-build/target-0.9.16/project-builds/scala-parallel-collections-f822b1c94478b1fe17bb3e1abb55c379b979315e/core/src/main/scala/scala/collection/parallel/ParSeqLike.scala:481:19: shadowing a nested class of a parent is deprecated but trait Transformer shadows trait Transformer defined in trait ParIterableLike; rename the class to something else
[scala-parallel-collections] [warn] /home/jenkins/workspace/scala-2.13.x-integrate-community-build/target-0.9.16/project-builds/scala-parallel-collections-f822b1c94478b1fe17bb3e1abb55c379b979315e/core/src/main/scala/scala/collection/parallel/ParSeqLike.scala:589:25: shadowing a nested class of a parent is deprecated but class Zip shadows class Zip defined in trait ParIterableLike; rename the class to something else
[scala-parallel-collections] [warn] /home/jenkins/workspace/scala-2.13.x-integrate-community-build/target-0.9.16/project-builds/scala-parallel-collections-f822b1c94478b1fe17bb3e1abb55c379b979315e/core/src/main/scala/scala/collection/parallel/RemainsIterator.scala:566:9: shadowing a nested class of a parent is deprecated but class Taken shadows class Taken defined in trait IterableSplitter; rename the class to something else
[scala-parallel-collections] [warn] /home/jenkins/workspace/scala-2.13.x-integrate-community-build/target-0.9.16/project-builds/scala-parallel-collections-f822b1c94478b1fe17bb3e1abb55c379b979315e/core/src/main/scala/scala/collection/parallel/RemainsIterator.scala:575:9: shadowing a nested class of a parent is deprecated but class Mapped shadows class Mapped defined in trait IterableSplitter; rename the class to something else
[scala-parallel-collections] [warn] /home/jenkins/workspace/scala-2.13.x-integrate-community-build/target-0.9.16/project-builds/scala-parallel-collections-f822b1c94478b1fe17bb3e1abb55c379b979315e/core/src/main/scala/scala/collection/parallel/RemainsIterator.scala:583:9: shadowing a nested class of a parent is deprecated but class Appended shadows class Appended defined in trait IterableSplitter; rename the class to something else
[scala-parallel-collections] [warn] /home/jenkins/workspace/scala-2.13.x-integrate-community-build/target-0.9.16/project-builds/scala-parallel-collections-f822b1c94478b1fe17bb3e1abb55c379b979315e/core/src/main/scala/scala/collection/parallel/RemainsIterator.scala:614:9: shadowing a nested class of a parent is deprecated but class Zipped shadows class Zipped defined in trait IterableSplitter; rename the class to something else
[scala-parallel-collections] [warn] /home/jenkins/workspace/scala-2.13.x-integrate-community-build/target-0.9.16/project-builds/scala-parallel-collections-f822b1c94478b1fe17bb3e1abb55c379b979315e/core/src/main/scala/scala/collection/parallel/RemainsIterator.scala:622:9: shadowing a nested class of a parent is deprecated but class ZippedAll shadows class ZippedAll defined in trait IterableSplitter; rename the class to something else
[scala-parallel-collections] [warn] /home/jenkins/workspace/scala-2.13.x-integrate-community-build/target-0.9.16/project-builds/scala-parallel-collections-f822b1c94478b1fe17bb3e1abb55c379b979315e/core/src/main/scala/scala/collection/parallel/Tasks.scala:142:9: shadowing a nested class of a parent is deprecated but trait WrappedTask shadows trait WrappedTask defined in trait Tasks; rename the class to something else
[scala-parallel-collections] [warn] /home/jenkins/workspace/scala-2.13.x-integrate-community-build/target-0.9.16/project-builds/scala-parallel-collections-f822b1c94478b1fe17bb3e1abb55c379b979315e/core/src/main/scala/scala/collection/parallel/Tasks.scala:240:9: shadowing a nested class of a parent is deprecated but trait WrappedTask shadows trait WrappedTask defined in trait Tasks; rename the class to something else
[scala-parallel-collections] [warn] /home/jenkins/workspace/scala-2.13.x-integrate-community-build/target-0.9.16/project-builds/scala-parallel-collections-f822b1c94478b1fe17bb3e1abb55c379b979315e/core/src/main/scala/scala/collection/parallel/Tasks.scala:303:9: shadowing a nested class of a parent is deprecated but class WrappedTask shadows trait WrappedTask defined in trait AdaptiveWorkStealingTasks; rename the class to something else
[scala-parallel-collections] [warn] /home/jenkins/workspace/scala-2.13.x-integrate-community-build/target-0.9.16/project-builds/scala-parallel-collections-f822b1c94478b1fe17bb3e1abb55c379b979315e/core/src/main/scala/scala/collection/parallel/mutable/ParArray.scala:655:9: shadowing a nested class of a parent is deprecated but class Map shadows class Map defined in trait ParIterableLike; rename the class to something else

expectation

Nothing for now, but consider renaming them when you can.