mimaReportBinaryIssues fails on branch 2.12.x

[regadas]

reproduction steps

git checkout 2.12.x
sbt mimaReportBinaryIssues

problem

[error] scala-library: Failed binary compatibility check against org.scala-lang:scala-library:2.12.13! Found 15 potential problems (filtered 1)
[error]  * method fromOrderedKeys(scala.collection.Iterator,Int)scala.collection.immutable.NewRedBlackTree#Tree in object scala.collection.immutable.NewRedBlackTree does not have a correspondent in current version
[error]    filter with: ProblemFilters.exclude[DirectMissingMethodProblem]("scala.collection.immutable.NewRedBlackTree.fromOrderedKeys")
[error]  * method fromOrderedEntries(scala.collection.Iterator,Int)scala.collection.immutable.NewRedBlackTree#Tree in object scala.collection.immutable.NewRedBlackTree does not have a correspondent in current version
[error]    filter with: ProblemFilters.exclude[DirectMissingMethodProblem]("scala.collection.immutable.NewRedBlackTree.fromOrderedEntries")
[error]  * method filterKeys(scala.collection.immutable.NewRedBlackTree#Tree,scala.Function1,Boolean)scala.collection.immutable.NewRedBlackTree#Tree in object scala.collection.immutable.NewRedBlackTree does not have a correspondent in current version
[error]    filter with: ProblemFilters.exclude[DirectMissingMethodProblem]("scala.collection.immutable.NewRedBlackTree.filterKeys")
[error]  * method partitionKeys(scala.collection.immutable.NewRedBlackTree#Tree,scala.Function1)scala.Tuple2 in object scala.collection.immutable.NewRedBlackTree does not have a correspondent in current version
[error]    filter with: ProblemFilters.exclude[DirectMissingMethodProblem]("scala.collection.immutable.NewRedBlackTree.partitionKeys")
[error]  * static method partitionKeys(scala.collection.immutable.NewRedBlackTree#Tree,scala.Function1)scala.Tuple2 in class scala.collection.immutable.NewRedBlackTree does not have a correspondent in current version
[error]    filter with: ProblemFilters.exclude[DirectMissingMethodProblem]("scala.collection.immutable.NewRedBlackTree.partitionKeys")
[error]  * static method filterKeys(scala.collection.immutable.NewRedBlackTree#Tree,scala.Function1,Boolean)scala.collection.immutable.NewRedBlackTree#Tree in class scala.collection.immutable.NewRedBlackTree does not have a correspondent in current version
[error]    filter with: ProblemFilters.exclude[DirectMissingMethodProblem]("scala.collection.immutable.NewRedBlackTree.filterKeys")
[error]  * static method fromOrderedEntries(scala.collection.Iterator,Int)scala.collection.immutable.NewRedBlackTree#Tree in class scala.collection.immutable.NewRedBlackTree does not have a correspondent in current version
[error]    filter with: ProblemFilters.exclude[DirectMissingMethodProblem]("scala.collection.immutable.NewRedBlackTree.fromOrderedEntries")
[error]  * static method fromOrderedKeys(scala.collection.Iterator,Int)scala.collection.immutable.NewRedBlackTree#Tree in class scala.collection.immutable.NewRedBlackTree does not have a correspondent in current version
[error]    filter with: ProblemFilters.exclude[DirectMissingMethodProblem]("scala.collection.immutable.NewRedBlackTree.fromOrderedKeys")
[error]  * method fromOrderedEntries(scala.collection.Iterator,scala.collection.Iterator,Int)scala.collection.immutable.NewRedBlackTree#Tree in object scala.collection.immutable.NewRedBlackTree does not have a correspondent in other version
[error]    filter with: ProblemFilters.exclude[DirectMissingMethodProblem]("scala.collection.immutable.NewRedBlackTree.fromOrderedEntries")
[error]  * method redWithLeft(scala.collection.immutable.NewRedBlackTree#Tree)scala.collection.immutable.NewRedBlackTree#Tree in class scala.collection.immutable.NewRedBlackTree#Tree does not have a correspondent in other version
[error]    filter with: ProblemFilters.exclude[DirectMissingMethodProblem]("scala.collection.immutable.NewRedBlackTree#Tree.redWithLeft")
[error]  * method redWithRight(scala.collection.immutable.NewRedBlackTree#Tree)scala.collection.immutable.NewRedBlackTree#Tree in class scala.collection.immutable.NewRedBlackTree#Tree does not have a correspondent in other version
[error]    filter with: ProblemFilters.exclude[DirectMissingMethodProblem]("scala.collection.immutable.NewRedBlackTree#Tree.redWithRight")
[error]  * method redWithLeftRight(scala.collection.immutable.NewRedBlackTree#Tree,scala.collection.immutable.NewRedBlackTree#Tree)scala.collection.immutable.NewRedBlackTree#Tree in class scala.collection.immutable.NewRedBlackTree#Tree does not have a correspondent in other version
[error]    filter with: ProblemFilters.exclude[DirectMissingMethodProblem]("scala.collection.immutable.NewRedBlackTree#Tree.redWithLeftRight")
[error]  * method blackWithLeftRight(scala.collection.immutable.NewRedBlackTree#Tree,scala.collection.immutable.NewRedBlackTree#Tree)scala.collection.immutable.NewRedBlackTree#Tree in class scala.collection.immutable.NewRedBlackTree#Tree does not have a correspondent in other version
[error]    filter with: ProblemFilters.exclude[DirectMissingMethodProblem]("scala.collection.immutable.NewRedBlackTree#Tree.blackWithLeftRight")
[error]  * static method fromOrderedEntries(scala.collection.Iterator,scala.collection.Iterator,Int)scala.collection.immutable.NewRedBlackTree#Tree in class scala.collection.immutable.NewRedBlackTree does not have a correspondent in other version
[error]    filter with: ProblemFilters.exclude[DirectMissingMethodProblem]("scala.collection.immutable.NewRedBlackTree.fromOrderedEntries")
[error]  * method asIterator()java.util.Iterator in class scala.collection.convert.Wrappers#IteratorWrapper does not have a correspondent in other version
[error]    filter with: ProblemFilters.exclude[DirectMissingMethodProblem]("scala.collection.convert.Wrappers#IteratorWrapper.asIterator")
[error] stack trace is suppressed; run last library / mimaReportBinaryIssues for the full output
[error] (library / mimaReportBinaryIssues) Failed binary compatibility check against org.scala-lang:scala-library:2.12.13! Found 15 potential problems (filtered 1)
[error] Total time: 2 s, completed Feb 17, 2021, 8:19:51 AM
sbt:root> mimaReportBinaryIssues

[dwijnand]

Thanks, I didn't realise that we need to backport scala/scala#9459. I'll do so.

[regadas]

Closing this since the PR scala/scala#9507 was merged

[regadas]

Just noticed this scala/scala@34d7610#r47245891