Exempt scala-pickling as well.

ivy/src/main/scala/sbt/IvyScala.scala

@@ -68,9 +68,10 @@ private object IvyScala {
         val depBinaryVersion = CrossVersion.binaryScalaVersion(id.getRevision)
         def isScalaLangOrg = id.getOrganisation == Organization
         def isNotScalaActorsMigration = !(id.getName startsWith "scala-actors-migration") // Exception to the rule: sbt/sbt#1818
+        def isNotScalaPickling = !(id.getName startsWith "scala-pickling") // Exception to the rule: sbt/sbt#1899
         def hasBinVerMismatch = depBinaryVersion != scalaBinaryVersion
         def matchesOneOfTheConfigs = dep.getModuleConfigurations.exists(configSet)
-        val mismatched = isScalaLangOrg && isNotScalaActorsMigration && hasBinVerMismatch && matchesOneOfTheConfigs
+        val mismatched = isScalaLangOrg && isNotScalaActorsMigration && isNotScalaPickling && hasBinVerMismatch && matchesOneOfTheConfigs
         if (mismatched)
           Some("Binary version (" + depBinaryVersion + ") for dependency " + id +
             "\n\tin " + module.getModuleRevisionId +

notes/0.13.8.markdown

@@ -77,7 +77,7 @@
 - Issues warning if multiple dependencies to a same library is found with different version. [#1634][1634] by [@eed3si9n][@eed3si9n]
 - Removes "No main class detected" warning. [#1766][1766] by [@eed3si9n][@eed3si9n]
 - Disable publishing on implicitly created root project by not enabling `IvyPlugin` by default (`-Dsbt.root.ivyplugin=true` will revert this behavior). [#1871][1871]/[#1869][1869] by [@dwijnand][@dwijnand] 
-- Exempt org.scala-lang:scala-actors-migration from scala binary version checks. [#1818][1818]/[#1899][1899] by [@dwijnand][@dwijnand]
+- Exempt org.scala-lang:scala-actors-migration and org.scala-lang:scala-pickling from scala binary version checks. [#1818][1818]/[#1899][1899] by [@dwijnand][@dwijnand]
 
 ### Rolling back XML parsing workaround
 

sbt/src/sbt-test/dependency-management/scala-version-check-exempt/build.sbt

@@ -2,12 +2,16 @@
 
 scalaVersion := "2.11.5"
 libraryDependencies += "org.scala-lang" %% "scala-actors-migration" % "1.1.0"
+libraryDependencies += "org.scala-lang" %% "scala-pickling" % "0.9.1"
 
 lazy val check = taskKey[Unit]("Runs the check")
+
 check := {
   val lastLog = BuiltinCommands lastLogFile state.value
   val last = IO read lastLog.get
   def containsWarn1 = last contains "Binary version (1.1.0) for dependency org.scala-lang#scala-actors-migration_2.11;1.1.0"
-  def containsWarn2 = last contains "differs from Scala binary version in project (2.11)."
-  if (containsWarn1 && containsWarn2) sys error "scala-actors-migration isn't exempted from the Scala binary version check"
+  def containsWarn2 = last contains "Binary version (0.9.1) for dependency org.scala-lang#scala-pickling_2.11;0.9.1"
+  def containsWarn3 = last contains "differs from Scala binary version in project (2.11)."
+  if (containsWarn1 && containsWarn3) sys error "scala-actors-migration isn't exempted from the Scala binary version check"
+  if (containsWarn2 && containsWarn3) sys error "scala-pickling isn't exempted from the Scala binary version check"
 }