Why does IDEA report "Error:scalac: error while loading Object, Missing dependency 'object scala in compiler mirror'" building scala breeze?

Question

The breeze project builds fine from command line sbt:

sbt package
...
info] Done packaging.
[info] Packaging /shared/breeze/viz/target/scala-2.11/breeze-viz_2.11-0.11-SNAPSHOT.jar ...
[info] Done packaging.
[success] Total time: 238 s, completed Jan 27, 2015 9:40:03 AM

However , the following error comes up repeatedly when doing Build|Rebuild Project in IntelliJ IDEA 14:

Error:scalac: error while loading Object, Missing dependency 'object scala in compiler mirror', required by /Library/Java/JavaVirtualMachines/jdk1.7.0_25.jdk/Contents/Home/jre/lib/rt.jar(java/lang/Object.class)

Here is the full stacktrace:

Error:scalac: Error: scala.tools.nsc.typechecker.Namers$Namer.enterExistingSym(Lscala/reflect/internal/Symbols$Symbol;)Lscala/tools/nsc/typechecker/Contexts$Context;
java.lang.NoSuchMethodError: scala.tools.nsc.typechecker.Namers$Namer.enterExistingSym(Lscala/reflect/internal/Symbols$Symbol;)Lscala/tools/nsc/typechecker/Contexts$Context;
    at org.scalamacros.paradise.typechecker.Namers$Namer$class.enterSym(Namers.scala:41)
    at org.scalamacros.paradise.typechecker.Namers$$anon$3.enterSym(Namers.scala:13)
    at org.scalamacros.paradise.typechecker.AnalyzerPlugins$MacroPlugin$.pluginsEnterSym(AnalyzerPlugins.scala:35)
    at scala.tools.nsc.typechecker.AnalyzerPlugins$$anon$13.custom(AnalyzerPlugins.scala:429)
    at scala.tools.nsc.typechecker.AnalyzerPlugins$$anonfun$2.apply(AnalyzerPlugins.scala:371)
    at scala.tools.nsc.typechecker.AnalyzerPlugins$$anonfun$2.apply(AnalyzerPlugins.scala:371)
    at scala.collection.immutable.List.map(List.scala:273)
    at scala.tools.nsc.typechecker.AnalyzerPlugins$class.invoke(AnalyzerPlugins.scala:371)
    at scala.tools.nsc.typechecker.AnalyzerPlugins$class.pluginsEnterSym(AnalyzerPlugins.scala:423)
    at scala.tools.nsc.Global$$anon$1.pluginsEnterSym(Global.scala:463)
    at scala.tools.nsc.typechecker.Namers$Namer.enterSym(Namers.scala:274)
    at scala.tools.nsc.typechecker.Namers$Namer$$anonfun$enterSyms$1.apply(Namers.scala:500)
    at scala.tools.nsc.typechecker.Namers$Namer$$anonfun$enterSyms$1.apply(Namers.scala:499)
    at scala.collection.LinearSeqOptimized$class.foldLeft(LinearSeqOptimized.scala:124)
    at scala.collection.immutable.List.foldLeft(List.scala:84)
    at scala.tools.nsc.typechecker.Namers$Namer.enterSyms(Namers.scala:499)
    at scala.tools.nsc.typechecker.Namers$Namer.templateSig(Namers.scala:925)
    at scala.tools.nsc.typechecker.Namers$Namer.moduleSig(Namers.scala:989)
    at scala.tools.nsc.typechecker.Namers$Namer.getSig$1(Namers.scala:1526)
    at scala.tools.nsc.typechecker.Namers$Namer.typeSig(Namers.scala:1541)
    at scala.tools.nsc.typechecker.Namers$Namer$$anonfun$monoTypeCompleter$1$$anonfun$apply$1.apply$mcV$sp(Namers.scala:781)
    at scala.tools.nsc.typechecker.Namers$Namer$$anonfun$monoTypeCompleter$1$$anonfun$apply$1.apply(Namers.scala:780)
    at scala.tools.nsc.typechecker.Namers$Namer$$anonfun$monoTypeCompleter$1$$anonfun$apply$1.apply(Namers.scala:780)
    at scala.tools.nsc.typechecker.Namers$Namer.scala$tools$nsc$typechecker$Namers$Namer$$logAndValidate(Namers.scala:1568)
    at scala.tools.nsc.typechecker.Namers$Namer$$anonfun$monoTypeCompleter$1.apply(Namers.scala:780)
    at scala.tools.nsc.typechecker.Namers$Namer$$anonfun$monoTypeCompleter$1.apply(Namers.scala:772)
    at scala.tools.nsc.typechecker.Namers$$anon$1.completeImpl(Namers.scala:1684)
    at scala.tools.nsc.typechecker.Namers$LockingTypeCompleter$class.complete(Namers.scala:1692)
    at scala.tools.nsc.typechecker.Namers$$anon$1.complete(Namers.scala:1682)
    at scala.reflect.internal.Symbols$Symbol.info(Symbols.scala:1483)
    at scala.reflect.internal.SymbolTable.openPackageModule(SymbolTable.scala:286)
    at scala.tools.nsc.typechecker.Analyzer$packageObjects$$anon$2$$anon$4.traverse(Analyzer.scala:63)
    at scala.tools.nsc.typechecker.Analyzer$packageObjects$$anon$2$$anon$4.traverse(Analyzer.scala:59)
    at scala.reflect.api.Trees$Traverser$$anonfun$traverseStats$1$$anonfun$apply$1.apply$mcV$sp(Trees.scala:2498)
    at scala.reflect.api.Trees$Traverser.atOwner(Trees.scala:2507)
    at scala.reflect.api.Trees$Traverser.traverseStats(Trees.scala:2497)
    at scala.reflect.internal.Trees$class.itraverse(Trees.scala:1326)
    at scala.reflect.internal.SymbolTable.itraverse(SymbolTable.scala:16)
    at scala.reflect.internal.SymbolTable.itraverse(SymbolTable.scala:16)
    at scala.reflect.api.Trees$Traverser.traverse(Trees.scala:2475)
    at scala.tools.nsc.typechecker.Analyzer$packageObjects$$anon$2$$anon$4.traverse(Analyzer.scala:66)
    at scala.tools.nsc.typechecker.Analyzer$packageObjects$$anon$2$$anon$4.traverse(Analyzer.scala:59)
    at scala.reflect.api.Trees$Traverser$$anonfun$traverseStats$1$$anonfun$apply$1.apply$mcV$sp(Trees.scala:2498)
    at scala.reflect.api.Trees$Traverser.atOwner(Trees.scala:2507)
    at scala.reflect.api.Trees$Traverser.traverseStats(Trees.scala:2497)
    at scala.reflect.internal.Trees$class.itraverse(Trees.scala:1326)
    at scala.reflect.internal.SymbolTable.itraverse(SymbolTable.scala:16)
    at scala.reflect.internal.SymbolTable.itraverse(SymbolTable.scala:16)
    at scala.reflect.api.Trees$Traverser.traverse(Trees.scala:2475)
    at scala.tools.nsc.typechecker.Analyzer$packageObjects$$anon$2$$anon$4.traverse(Analyzer.scala:66)
    at scala.tools.nsc.typechecker.Analyzer$packageObjects$$anon$2$$anon$4.traverse(Analyzer.scala:59)
    at scala.reflect.api.Trees$Traverser.apply(Trees.scala:2513)
    at scala.tools.nsc.typechecker.Analyzer$packageObjects$$anon$2.apply(Analyzer.scala:71)
    at scala.tools.nsc.Global$GlobalPhase$$anonfun$applyPhase$1.apply$mcV$sp(Global.scala:441)
    at scala.tools.nsc.Global$GlobalPhase.withCurrentUnit(Global.scala:432)
    at scala.tools.nsc.Global$GlobalPhase.applyPhase(Global.scala:441)
    at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:399)
    at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:399)
    at scala.collection.Iterator$class.foreach(Iterator.scala:750)
    at scala.collection.AbstractIterator.foreach(Iterator.scala:1202)
    at scala.tools.nsc.Global$GlobalPhase.run(Global.scala:399)
    at scala.tools.nsc.Global$Run.compileUnitsInternal(Global.scala:1500)
    at scala.tools.nsc.Global$Run.compileUnits(Global.scala:1487)
    at scala.tools.nsc.Global$Run.compileSources(Global.scala:1482)
    at scala.tools.nsc.Global$Run.compile(Global.scala:1580)
    at xsbt.CachedCompiler0.run(CompilerInterface.scala:126)
    at xsbt.CachedCompiler0.run(CompilerInterface.scala:102)
    at xsbt.CompilerInterface.run(CompilerInterface.scala:27)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at sbt.compiler.AnalyzingCompiler.call(AnalyzingCompiler.scala:102)
    at sbt.compiler.AnalyzingCompiler.compile(AnalyzingCompiler.scala:48)
    at sbt.compiler.AnalyzingCompiler.compile(AnalyzingCompiler.scala:41)
    at org.jetbrains.jps.incremental.scala.local.IdeaIncrementalCompiler.compile(IdeaIncrementalCompiler.scala:29)
    at org.jetbrains.jps.incremental.scala.local.LocalServer.compile(LocalServer.scala:26)
    at org.jetbrains.jps.incremental.scala.remote.Main$.make(Main.scala:65)
    at org.jetbrains.jps.incremental.scala.remote.Main$.nailMain(Main.scala:23)
    at org.jetbrains.jps.incremental.scala.remote.Main.nailMain(Main.scala)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.martiansoftware.nailgun.NGSession.run(NGSession.java:319)

Delainedelainey

See #23317826 – Premise

@NickJacobs That other question does not apply for at least two reasons. (a) as mentioned in the OP: the compilation works on the command line (Build.scala is not broken!) (b) did you actually look at breeze build.sbt? It does not override common (and I have not touched it) – Delainedelainey

The same happens to me in Eclipse. – Trademark

Try turning off incremental compilation? Just a thought. Scala IDEs try to save time by optimizing the compile process. Also a recent problem I've had with intellij is that it hasn't been updating dependencies properly. Try removing the .idea folder and reimporting the project. Just some heuristics that might help – Prenatal

@mechko I do not have incremental compilation turned on. I have gone through nuking the .idea folder several times also. Thanks anyways for the thoughts. – Delainedelainey

I mentioned incremental because I saw it somewhere in the stack trace (near the bottom). I feel your pain, most vividly. – Prenatal

@mechko Well this is explicitly during Project|Rebuild so incremental compilation does not apply in this case. – Delainedelainey

Also just noticed. Jdk version on intelliji is 1.7. That might be different from the terminal – Prenatal

@mechko jdk version on terminal is 1.7.0.25. Have you been successful to build this in IJ? – Delainedelainey

Let us continue this discussion in chat. – Prenatal

It's hard to guess the full scope of what you're seeing... the first error that you list ("error while loading object") isn't in the stack trace. What is the relationship between the error and the stack trace? This looks like a tooling classpath version skew of some kind - or maybe even two of them. – Rosiorosita

Also, if you haven't already, take a look at groups.google.com/forum/#!topic/scala-ide-user/QlRRDcz-s5o – Rosiorosita

@EdStaub That is for the scala-ide: this question is for Intellij – Delainedelainey

Answer 1

There's a version mismatch between the Scala compiler and the macro paradise version. Macro-paradise is a compiler plugin and is tightly coupled to the Scala compiler, so it's cross-compiled against a full Scala version. Check the version of Scala that IntelliJ uses and check what Scala version is macro-paradise compiled against.

Not sure exactly how Intellij works, but in Eclipse there's a "Scala Installation" configuration page (similar to JDK). You can set a Scala Installation that matches the paradise version. Maybe IntelliJ has a similar concept.

Unhandsome

Answer 2

For my case, I switch to JDK8, now it builds successfully.

Mccubbin