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Linking error on Array() pattern with Scala.js 0.6.25 and Scala 2.13.0-M4

See original GitHub issue

Main.scala

package example

object Main {
  def main(args: Array[String]): Unit = {
    val Array(x, xs @ _*) = args
  }
}

build.sbt

scalaVersion := "2.13.0-M4"

enablePlugins(ScalaJSPlugin)

project/build.properties

sbt.version=1.2.1

project/plugins.sbt

addSbtPlugin("org.scala-js" % "sbt-scalajs" % "0.6.25")

execute `sbt fastOptJS`

[error] Referring to non-existent method scala.Array$.unapplySeq(java.lang.Object)scala.Option
[error]   called from example.Main$.main([java.lang.String)scala.Unit
[error]   called from core module module initializers
[error] involving instantiated classes:
[error]   example.Main$
[error] org.scalajs.core.tools.linker.LinkingException: There were linking errors
[error] 	at org.scalajs.core.tools.linker.frontend.BaseLinker.linkInternal(BaseLinker.scala:160)
[error] 	at org.scalajs.core.tools.linker.frontend.BaseLinker.linkInternal(BaseLinker.scala:108)
[error] 	at org.scalajs.core.tools.linker.frontend.LinkerFrontend.$anonfun$link$3(LinkerFrontend.scala:63)
[error] 	at org.scalajs.core.tools.logging.Logger.time(Logger.scala:28)
[error] 	at org.scalajs.core.tools.logging.Logger.time$(Logger.scala:26)
[error] 	at org.scalajs.sbtplugin.Loggers$SbtLoggerWrapper.time(Loggers.scala:7)
[error] 	at org.scalajs.core.tools.linker.frontend.LinkerFrontend.link(LinkerFrontend.scala:62)
[error] 	at org.scalajs.core.tools.linker.Linker.$anonfun$link$1(Linker.scala:52)
[error] 	at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
[error] 	at org.scalajs.core.tools.linker.Linker.guard(Linker.scala:69)
[error] 	at org.scalajs.core.tools.linker.Linker.link(Linker.scala:50)
[error] 	at org.scalajs.core.tools.linker.ClearableLinker.$anonfun$link$1(ClearableLinker.scala:52)
[error] 	at org.scalajs.core.tools.linker.ClearableLinker.$anonfun$link$1$adapted(ClearableLinker.scala:52)
[error] 	at org.scalajs.core.tools.linker.ClearableLinker.linkerOp(ClearableLinker.scala:63)
[error] 	at org.scalajs.core.tools.linker.ClearableLinker.link(ClearableLinker.scala:52)
[error] 	at org.scalajs.sbtplugin.ScalaJSPluginInternal$.$anonfun$scalaJSStageSettings$11(ScalaJSPluginInternal.scala:315)
[error] 	at sbt.util.FileFunction$.$anonfun$cached$1(FileFunction.scala:73)
[error] 	at sbt.util.FileFunction$.$anonfun$cached$4(FileFunction.scala:147)
[error] 	at sbt.util.Difference.apply(Tracked.scala:313)
[error] 	at sbt.util.Difference.apply(Tracked.scala:293)
[error] 	at sbt.util.FileFunction$.$anonfun$cached$3(FileFunction.scala:143)
[error] 	at sbt.util.Difference.apply(Tracked.scala:313)
[error] 	at sbt.util.Difference.apply(Tracked.scala:288)
[error] 	at sbt.util.FileFunction$.$anonfun$cached$2(FileFunction.scala:142)
[error] 	at org.scalajs.sbtplugin.ScalaJSPluginInternal$.$anonfun$scalaJSStageSettings$10(ScalaJSPluginInternal.scala:320)
[error] 	at sbt.std.Transform$$anon$3.$anonfun$apply$2(System.scala:46)
[error] 	at sbt.std.Transform$$anon$4.work(System.scala:67)
[error] 	at sbt.Execute.$anonfun$submit$2(Execute.scala:269)
[error] 	at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:16)
[error] 	at sbt.Execute.work(Execute.scala:278)
[error] 	at sbt.Execute.$anonfun$submit$1(Execute.scala:269)
[error] 	at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:178)
[error] 	at sbt.CompletionService$$anon$2.call(CompletionService.scala:37)
[error] 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[error] 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[error] 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[error] 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[error] 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[error] 	at java.lang.Thread.run(Thread.java:748)
[error] (Compile / fastOptJS) org.scalajs.core.tools.linker.LinkingException: There were linking errors

Issue Analytics

State:
Created 5 years ago
Comments:8 (5 by maintainers)

Top GitHub Comments

1reaction

sjrdcommented, Nov 27, 2018

@djspiewak Scala.js 0.6.26 is on its way to Maven Central, and includes this fix. Release notes will follow in the coming days.

1reaction

sjrdcommented, Sep 2, 2018

Ouch. So I made a mistake in 1a7f013641edd77dd427e05a50f9d38462fbd154. I did not realize that the changes to unapplySeq were binary-incompatible. I should have preserved a snapshot of the old overrides for 2.13.0-M4.

We can fix it, but the fix will probably never see the light of a release, because I don’t intend to keep supporting 2.13.0-M4 in future versions of Scala.js. The only reason 0.6.25 has it was to provide an upgrade path (SJS 0.6.24 w/ M4 -> SJS 0.6.25 w/ M4 -> SJS 0.6.25 w/ M5).

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