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Posted to notifications@pekko.apache.org by "pjfanning (via GitHub)" <gi...@apache.org> on 2026/09/11 16:41:13 UTC

[PR] build: test Scala 3.3.9-RC1 [pekko]

pjfanning opened a new pull request, #3538:
URL: https://github.com/apache/pekko/pull/3538

   ### Motivation
   Scala 3.3.9-RC1 is available and it is useful to find out early whether Pekko builds and its tests pass on the upcoming 3.3.x LTS release.
   
   ### Modification
   Bumped `scala3Version` in `project/Dependencies.scala` from 3.3.8 to 3.3.9-RC1.
   
   ### Result
   CI builds and tests against Scala 3.3.9-RC1. This is a test build only and is not intended to be merged as-is.
   
   ### Tests
   - Not run locally - relying on CI
   
   ### References
   None - Scala 3.3.9-RC1 test build


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Re: [PR] build: update Scala 3 to 3.3.9 [pekko]

Posted by "pjfanning (via GitHub)" <gi...@apache.org>.
pjfanning merged PR #3538:
URL: https://github.com/apache/pekko/pull/3538


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Re: [PR] build: test Scala 3.3.9-RC1 [pekko]

Posted by "pjfanning (via GitHub)" <gi...@apache.org>.
pjfanning commented on PR #3538:
URL: https://github.com/apache/pekko/pull/3538#issuecomment-5639443441

   I raised https://github.com/scala/scala3/issues/27063 for the mima issues.


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Re: [PR] build: test Scala 3.3.9-RC1 [pekko]

Posted by "He-Pin (via GitHub)" <gi...@apache.org>.
He-Pin commented on PR #3538:
URL: https://github.com/apache/pekko/pull/3538#issuecomment-6094209320

   CI is green on 3.3.9-RC1. Per the PR description this is a test build not intended to be merged, so leaving it as is. Note that 3.3.9-RC2 is out now - this branch could be bumped to RC2 to keep validating against the upcoming LTS patch. Once 3.3.9 final is released, the regular dependency-update flow can supersede this PR.


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Re: [PR] build: update Scala 3 to 3.3.9 [pekko]

Posted by "He-Pin (via GitHub)" <gi...@apache.org>.
He-Pin commented on code in PR #3538:
URL: https://github.com/apache/pekko/pull/3538#discussion_r4403551511


##########
project/PekkoBuild.scala:
##########
@@ -143,6 +144,9 @@ object PekkoBuild {
     Compile / javacOptions ++= (if (allWarnings) Seq("-Xlint:deprecation") else Nil),
     doc / javacOptions := Seq(),
     crossVersion := CrossVersion.binary,
+    // Scala 3 emits different generic signatures than Scala 2.13 so
+    // only report signature problems for Scala 2.13
+    mimaReportSignatureProblems := !scalaVersion.value.startsWith("3."),

Review Comment:
   is it possible we compare new Scala 3 for Scala 3.3.x ?



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Re: [PR] build: update Scala 3 to 3.3.9 [pekko]

Posted by "pjfanning (via GitHub)" <gi...@apache.org>.
pjfanning commented on code in PR #3538:
URL: https://github.com/apache/pekko/pull/3538#discussion_r4403668153


##########
project/PekkoBuild.scala:
##########
@@ -143,6 +144,9 @@ object PekkoBuild {
     Compile / javacOptions ++= (if (allWarnings) Seq("-Xlint:deprecation") else Nil),
     doc / javacOptions := Seq(),
     crossVersion := CrossVersion.binary,
+    // Scala 3 emits different generic signatures than Scala 2.13 so
+    // only report signature problems for Scala 2.13
+    mimaReportSignatureProblems := !scalaVersion.value.startsWith("3."),

Review Comment:
   this upgrade causes a massive mima issue - and this was the suggested fix from the scala3 team - https://github.com/scala/scala3/issues/27063



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