2.12: new Scala SHA

[SethTisue]

https://scala-ci.typesafe.com/view/scala-2.12.x/job/scala-2.12.x-jdk8-integrate-community-build/6442/
https://scala-ci.typesafe.com/view/scala-2.12.x/job/scala-2.12.x-jdk8-integrate-community-build/6443/
https://scala-ci.typesafe.com/view/scala-2.12.x/job/scala-2.12.x-jdk8-integrate-community-build/6445/
https://scala-ci.typesafe.com/view/scala-2.12.x/job/scala-2.12.x-jdk8-integrate-community-build/6447/
https://scala-ci.typesafe.com/view/scala-2.12.x/job/scala-2.12.x-jdk8-integrate-community-build/6448/

[SethTisue]

doobie failure

[doobie] [error] java.lang.UnsupportedOperationException: Position.point on NoPosition
[doobie] [error] 	at scala.reflect.internal.util.Position.fail(Position.scala:24)
[doobie] [error] 	at scala.reflect.internal.util.UndefinedPosition.point(Position.scala:102)
[doobie] [error] 	at scala.reflect.internal.util.UndefinedPosition.point(Position.scala:97)
[doobie] [error] 	at scala.reflect.internal.util.DeprecatedPosition.startOrPoint(Position.scala:260)
[doobie] [error] 	at scala.reflect.internal.util.DeprecatedPosition.startOrPoint$(Position.scala:260)
[doobie] [error] 	at scala.reflect.internal.util.Position.startOrPoint(Position.scala:19)
[doobie] [error] 	at org.wartremover.WartTraverser.hasTypeAscription(WartTraverser.scala:99)

spire failure

[spire] [error] ## Exception when compiling 156 sources to /home/jenkins/workspace/scala-2.12.x-jdk8-integrate-community-build/target-0.9.17/project-builds/spire-cf3a2817fe910988bd999352c09ade6244cfe229/core/.jvm/target/scala-2.12/classes
[spire] [error] scala.reflect.internal.Types$TypeError: type mismatch;
[spire] [error]  found   : Double
[spire] [error]  required: Object
[spire] [error] 
[spire] [error]            
[spire] [error] scala.reflect.internal.Types$TypeError: type mismatch;
[spire] [error]  found   : Double
[spire] [error]  required: Object
[spire] [error] (coreJVM / Compile / compileIncremental) scala.reflect.internal.Types$TypeError: type mismatch;
[spire] [error]  found   : Double
[spire] [error]  required: Object

[SethTisue]

the doobie thing is reproducible outside dbuild, in the community-build-2.12 branch in our fork of the repo under the scalacommunitybuild org, with ++2.12.14-bin-a9b6d67 and

-    addCompilerPlugin("org.typelevel" %% "kind-projector" % kindProjectorVersion cross CrossVersion.full),
+    addCompilerPlugin("org.typelevel" % "kind-projector_2.12.13" % kindProjectorVersion),

wartremover is involved, so isn't obvious whether this is scalac's fault or wartremover's fault

I do note that scala.reflect.internal.util.DeprecatedPosition is involved

oh, it looks like this may have been fixed, after our freeze point, by wartremover/wartremover#469 -- I'll try forking and cherry-picking that fix

UPDATE: yay, green in run 6445

[SethTisue]

as for spire, it's reproducible outside dbuild just with ++2.12.14-bin-a9b6d67 and coreJVM/compile

which makes it easy to bisect. roundup of the scala/scala suspects:

* 43a5a75bb1 - Merge pull request #9082 from retronym/ticket/scala-async-152 (3 days ago) <Lukas Rytz>
* 7ca86b97d5 - Merge pull request #9455 from retronym/ticket/sd-741-pipeline-main-race (3 days ago) <Lukas Rytz>
* f854b0f885 - Merge pull request #9356 from retronym/ticket/11882 (3 days ago) <Jason Zaugg>
* fdb88812ac - Merge pull request #9443 from som-snytt/issue/12315 (8 days ago) <Lukas Rytz>
* 2a693ec702 - Merge pull request #9355 from retronym/ticket/12213 (10 days ago) <Dale Wijnand>
* 2f1a80763d - Merge pull request #9436 from dwijnand/2.12/mima (13 days ago) <Dale Wijnand>
* e72a873f99 - Merge pull request #9315 from mkeskells/2.12.x_RedBlack_reuse_fp (13 days ago) <Dale Wijnand>
* 951c395c80 - Merge pull request #9316 from mkeskells/2.12.x_RedBlack_simple (2 weeks ago) <Seth Tisue>
* d613e1f5f9 - Merge pull request #9046 from mkeskells/2.12.x_RedBlackTree_remove_duplication (2 weeks ago) <Dale Wijnand>
* 78bf3a2d1e - Merge pull request #9342 from gzm0/annotated-literal-annotation-arg (2 weeks ago) <Dale Wijnand>
* 85a8814d26 - Merge pull request #9369 from sjrd/remove-dead-code-patmat-array-unit (2 weeks ago) <Dale Wijnand>
* d057f62275 - Merge pull request #9419 from koterpillar/patch-1 (2 weeks ago) <Dale Wijnand>
* f2d2e6e6e0 - Merge pull request #9426 from tanishiking/singleton-type-tree-12296 (2 weeks ago) <Seth Tisue>
* 8850b1fe0c - Merge pull request #9434 from aaabramov/patch-1 (2 weeks ago) <Seth Tisue>

bisecting shows the culprit PR to be scala/scala#9356 (2.12.14-bin-f854b0f)

I checked and the problem is also reproducible on spire master, not only the old version we're frozen on

I opened scala/scala-dev#760 on it

[SethTisue]

Jason pushed a fix for spire to scala/scala. I'll re-run with the new Scala SHA (once https://travis-ci.com/github/scala/scala/jobs/477767152 publishes it)