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Intellij 12 and internal compilation error when building scala project

I just downloaded Intellij 12.01 (build # IC-123.94), and as soon as I try to build a Scala project, I get the following stack:

Internal error: (java.lang.ClassNotFoundException) org.jetbrains.jps.incremental.BinaryContent java.lang.ClassNotFoundException: org.jetbrains.jps.incremental.BinaryContent at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) at org.jetbrains.jps.incremental.scala.LazyCompiledClass.<init>(ScalaBuilder.scala:239) at org.jetbrains.jps.incremental.scala.IdeClient.generated(ScalaBuilder.scala:230) at org.jetbrains.jps.incremental.scala.remote.ClientEventProcessor.process(ClientEventProcessor.scala:17) at org.jetbrains.jps.incremental.scala.remote.RemoteServer$.liftedTree1$1(RemoteServer.scala:76) at org.jetbrains.jps.incremental.scala.remote.RemoteServer$.org$jetbrains$jps$incremental$scala$remote$RemoteServer$$handle(RemoteServer.scala:74) at org.jetbrains.jps.incremental.scala.remote.RemoteServer$$anonfun$send$1$$anonfun$apply$1$$anonfun$apply$3.apply(RemoteServer.scala:44) at org.jetbrains.jps.incremental.scala.remote.RemoteServer$$anonfun$send$1$$anonfun$apply$1$$anonfun$apply$3.apply(RemoteServer.scala:43) at org.jetbrains.jps.incremental.scala.package$.using(package.scala:15) at org.jetbrains.jps.incremental.scala.remote.RemoteServer$$anonfun$send$1$$anonfun$apply$1.apply(RemoteServer.scala:43) at org.jetbrains.jps.incremental.scala.remote.RemoteServer$$anonfun$send$1$$anonfun$apply$1.apply(RemoteServer.scala:40) at org.jetbrains.jps.incremental.scala.package$.using(package.scala:15) at org.jetbrains.jps.incremental.scala.remote.RemoteServer$$anonfun$send$1.apply(RemoteServer.scala:40) at org.jetbrains.jps.incremental.scala.remote.RemoteServer$$anonfun$send$1.apply(RemoteServer.scala:39) at org.jetbrains.jps.incremental.scala.package$.using(package.scala:15) at org.jetbrains.jps.incremental.scala.remote.RemoteServer.send(RemoteServer.scala:39) at org.jetbrains.jps.incremental.scala.remote.RemoteServer.compile(RemoteServer.scala:24) at org.jetbrains.jps.incremental.scala.ScalaBuilder$$anonfun$5$$anonfun$apply$3$$anonfun$apply$4.apply(ScalaBuilder.scala:110) at org.jetbrains.jps.incremental.scala.ScalaBuilder$$anonfun$5$$anonfun$apply$3$$anonfun$apply$4.apply(ScalaBuilder.scala:100) at scala.util.Either$RightProjection.map(Either.scala:536) at org.jetbrains.jps.incremental.scala.ScalaBuilder$$anonfun$5$$anonfun$apply$3.apply(ScalaBuilder.scala:100) at org.jetbrains.jps.incremental.scala.ScalaBuilder$$anonfun$5$$anonfun$apply$3.apply(ScalaBuilder.scala:99) at scala.util.Either$RightProjection.flatMap(Either.scala:523) at org.jetbrains.jps.incremental.scala.ScalaBuilder$$anonfun$5.apply(ScalaBuilder.scala:99) at org.jetbrains.jps.incremental.scala.ScalaBuilder$$anonfun$5.apply(ScalaBuilder.scala:98) at scala.util.Either$RightProjection.flatMap(Either.scala:523) at org.jetbrains.jps.incremental.scala.ScalaBuilder.doBuild(ScalaBuilder.scala:98) at org.jetbrains.jps.incremental.scala.ScalaBuilder.build(ScalaBuilder.scala:67) at org.jetbrains.jps.incremental.scala.ScalaBuilderService$ScalaBuilderDecorator.build(ScalaBuilderService.java:42) at org.jetbrains.jps.incremental.IncProjectBuilder.runModuleLevelBuilders(IncProjectBuilder.java:963) at org.jetbrains.jps.incremental.IncProjectBuilder.runBuildersForChunk(IncProjectBuilder.java:710) at org.jetbrains.jps.incremental.IncProjectBuilder.buildTargetsChunk(IncProjectBuilder.java:740) at org.jetbrains.jps.incremental.IncProjectBuilder.buildChunkIfAffected(IncProjectBuilder.java:673) at org.jetbrains.jps.incremental.IncProjectBuilder.buildChunks(IncProjectBuilder.java:494) at org.jetbrains.jps.incremental.IncProjectBuilder.runBuild(IncProjectBuilder.java:274) at org.jetbrains.jps.incremental.IncProjectBuilder.build(IncProjectBuilder.java:164) at org.jetbrains.jps.cmdline.BuildRunner.runBuild(BuildRunner.java:114) at org.jetbrains.jps.cmdline.BuildSession.runBuild(BuildSession.java:205) at org.jetbrains.jps.cmdline.BuildSession.run(BuildSession.java:102) at org.jetbrains.jps.cmdline.BuildMain$MyMessageHandler$1.run(BuildMain.java:107) at org.jetbrains.jps.service.impl.SharedThreadPoolImpl$1.run(SharedThreadPoolImpl.java:26) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662)

Apparently, the problem comes from openapi.jar inside the Intellij lib folder, which should contain such a class.

Any pointers?

Sincerely.

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2 answers

Had the same problem with Idea 12, but after updating the Scala plugin to version 0.7.62, the problem was solved for me.

However, you can try following Idea's advice:

In case of any problems with compilation, you can enable the previous (internal) compiler by clearing: Project Settings / Compiler / Using an External Assembly

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For me, too, the same problem fixed by updating to nightly collections (0.7.82), instructions are available here: http://confluence.jetbrains.net/display/SCA/Scala+Plugin+Nightly+Builds+for+Leda

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