exception when typing new <error>("a")/class scala.reflect.internal.Trees$Apply
class type required but ErasedValueType(class Opt, Object) found in file /Users/user/scalac-bug/Opt.scala
[error] 
[error]   unrecoverable error
[error]      while compiling: /Users/user/scalac-bug/Opt.scala
[error]         during phase: globalPhase=erasure, enteringPhase=posterasure
[error]      library version: version 2.12.0-M3
[error]     compiler version: version 2.12.0-M3
[error]   reconstructed args: -bootclasspath /Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/sunrsasign.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/classes:/Users/user/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.12.0-M3.jar -classpath /Users/user/scalac-bug/target/scala-2.12.0-M3/classes
[error] 
[error]   last tree to typer: TypeTree(class Object)
[error]        tree position: <unknown>
[error]             tree tpe: Object
[error]               symbol: class Object in package lang
[error]    symbol definition: class Object extends  (a ClassSymbol)
[error]       symbol package: java.lang
[error]        symbol owners: class Object
[error]            call site: object Main in package example in package example
[error] 
[error] <Cannot read source file>
exception when typing private[this] val x: ErasedValueType(class Opt, String) = new <error>("a")
exception when typing object Main extends Object {
  def <init>(): com.example.Main.type = {
    Main.super.<init>();
    ()
  };
  private[this] val x: ErasedValueType(class Opt, String) = new <error>("a");
  <stable> <accessor> def x(): ErasedValueType(class Opt, String) = Main.this.x
}
exception when typing package com.example {
  final case class Opt extends Object with Product with Serializable {
    <caseaccessor> <paramaccessor> private[this] val get: Object = _;
    <stable> <caseaccessor> <accessor> <paramaccessor> def get(): Object = Opt.this.get;
    private[example] def <init>(get: Object): com.example.Opt = {
      Opt.super.<init>();
      Opt.this./*Product$class*/$init$();
      ()
    };
    <synthetic> def copy(get: Object): ErasedValueType(class Opt, Object) = com.example.Opt.copy$extension(Opt.this, get);
    <synthetic> def copy$default$1(): Object = com.example.Opt.copy$default$1$extension(Opt.this);
    override <synthetic> def productPrefix(): String = com.example.Opt.productPrefix$extension(Opt.this);
    <synthetic> def productArity(): Int = com.example.Opt.productArity$extension(Opt.this);
    <synthetic> def productElement(x$1: Int): Object = com.example.Opt.productElement$extension(Opt.this, x$1);
    override <synthetic> def productIterator(): Iterator = com.example.Opt.productIterator$extension(Opt.this);
    <synthetic> def canEqual(x$1: Object): Boolean = com.example.Opt.canEqual$extension(Opt.this, x$1);
    override <synthetic> def hashCode(): Int = com.example.Opt.hashCode$extension(Opt.this);
    override <synthetic> def equals(x$1: Object): Boolean = com.example.Opt.equals$extension(Opt.this, x$1);
    override <synthetic> def toString(): String = com.example.Opt.toString$extension(Opt.this)
  };
  <synthetic> object Opt extends Object with Serializable {
    def <init>(): com.example.Opt.type = {
      Opt.super.<init>();
      ()
    };
    final override <synthetic> def toString(): String = "Opt";
    case <synthetic> def apply(get: Object): ErasedValueType(class Opt, Object) = InjectDerivedValue(get);
    case <synthetic> def unapply(x$0: ErasedValueType(class Opt, Object)): Option = if (x$0.==(null))
      scala.None
    else
      new Some(x$0.get());
    <synthetic> private def readResolve(): Object = com.example.Opt;
    final <synthetic> def copy$extension($this: ErasedValueType(class Opt, Object), get: Object): ErasedValueType(class Opt, Object) = InjectDerivedValue(get);
    final <synthetic> def copy$default$1$extension($this: ErasedValueType(class Opt, Object)): Object = $this.get();
    final <synthetic> def productPrefix$extension($this: ErasedValueType(class Opt, Object)): String = "Opt";
    final <synthetic> def productArity$extension($this: ErasedValueType(class Opt, Object)): Int = 1;
    final <synthetic> def productElement$extension($this: ErasedValueType(class Opt, Object), x$1: Int): Object = {
      case <synthetic> val x1: Int = x$1;
      (x1: Int) match {
        case 0 => $this.get()
        case _ => throw new IndexOutOfBoundsException(x$1.toString())
      }
    };
    final <synthetic> def productIterator$extension($this: ErasedValueType(class Opt, Object)): Iterator = scala.runtime.ScalaRunTime.typedProductIterator($this);
    final <synthetic> def canEqual$extension($this: ErasedValueType(class Opt, Object), x$1: Object): Boolean = x$1.$isInstanceOf[ErasedValueType(class Opt, Object)]();
    final <synthetic> def hashCode$extension($this: ErasedValueType(class Opt, Object)): Int = $this.get().hashCode();
    final <synthetic> def equals$extension($this: ErasedValueType(class Opt, Object), x$1: Object): Boolean = {
  case <synthetic> val x1: Object = x$1;
  case5(){
    if (x1.isInstanceOf[com.example.Opt]())
      matchEnd4(true)
    else
      case6()
  };
  case6(){
    matchEnd4(false)
  };
  matchEnd4(x: Boolean){
    x
  }
}.&&({
      <synthetic> val Opt$1: ErasedValueType(class Opt, Object) = x$1.asInstanceOf[ErasedValueType(class Opt, Object)]();
      $this.get().==(Opt$1.get())
    });
    final <synthetic> def toString$extension($this: ErasedValueType(class Opt, Object)): String = scala.runtime.ScalaRunTime._toString($this)
  };
  object Main extends Object {
    def <init>(): com.example.Main.type = {
      Main.super.<init>();
      ()
    };
    private[this] val x: ErasedValueType(class Opt, String) = new <error>("a");
    <stable> <accessor> def x(): ErasedValueType(class Opt, String) = Main.this.x
  }
}
scala.reflect.internal.FatalError: 
  unrecoverable error
     while compiling: /Users/user/scalac-bug/Opt.scala
        during phase: globalPhase=erasure, enteringPhase=posterasure
     library version: version 2.12.0-M3
    compiler version: version 2.12.0-M3
  reconstructed args: -bootclasspath /Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/sunrsasign.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/classes:/Users/user/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.12.0-M3.jar -classpath /Users/user/scalac-bug/target/scala-2.12.0-M3/classes

  last tree to typer: TypeTree(class Object)
       tree position: <unknown>
            tree tpe: Object
              symbol: class Object in package lang
   symbol definition: class Object extends  (a ClassSymbol)
      symbol package: java.lang
       symbol owners: class Object
           call site: object Main in package example in package example

<Cannot read source file>
	at scala.reflect.internal.Reporting$class.abort(Reporting.scala:59)
	at scala.reflect.internal.SymbolTable.abort(SymbolTable.scala:16)
	at scala.tools.nsc.transform.Erasure$Eraser.typed1(Erasure.scala:705)
	at scala.tools.nsc.typechecker.Typers$Typer.runTyper$1(Typers.scala:5385)
	at scala.tools.nsc.typechecker.Typers$Typer.typedInternal(Typers.scala:5412)
	at scala.tools.nsc.typechecker.Typers$Typer.body$2(Typers.scala:5359)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5363)
	at scala.tools.nsc.typechecker.Typers$Typer.transformedOrTyped(Typers.scala:5594)
	at scala.tools.nsc.typechecker.Typers$Typer.typedValDefImpl(Typers.scala:1984)
	at scala.tools.nsc.typechecker.Typers$Typer.typedValDef(Typers.scala:1947)
	at scala.tools.nsc.typechecker.Typers$Typer.typedMemberDef$1(Typers.scala:5296)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5348)
	at scala.tools.nsc.transform.Erasure$Eraser.typed1(Erasure.scala:698)
	at scala.tools.nsc.typechecker.Typers$Typer.runTyper$1(Typers.scala:5385)
	at scala.tools.nsc.typechecker.Typers$Typer.typedInternal(Typers.scala:5412)
	at scala.tools.nsc.typechecker.Typers$Typer.body$2(Typers.scala:5359)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5363)
	at scala.tools.nsc.typechecker.Typers$Typer.typedByValueExpr(Typers.scala:5441)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:3036)
	at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$$anonfun$219(Typers.scala:3140)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:3140)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1910)
	at scala.tools.nsc.typechecker.Typers$Typer.typedClassDef(Typers.scala:1751)
	at scala.tools.nsc.typechecker.Typers$Typer.typedMemberDef$1(Typers.scala:5298)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5348)
	at scala.tools.nsc.transform.Erasure$Eraser.typed1(Erasure.scala:698)
	at scala.tools.nsc.typechecker.Typers$Typer.runTyper$1(Typers.scala:5385)
	at scala.tools.nsc.typechecker.Typers$Typer.typedInternal(Typers.scala:5412)
	at scala.tools.nsc.typechecker.Typers$Typer.body$2(Typers.scala:5359)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5363)
	at scala.tools.nsc.typechecker.Typers$Typer.typedByValueExpr(Typers.scala:5441)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:3036)
	at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$$anonfun$219(Typers.scala:3140)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:3140)
	at scala.tools.nsc.typechecker.Typers$Typer.typedPackageDef$1(Typers.scala:5004)
	at scala.tools.nsc.typechecker.Typers$Typer.typedMemberDef$1(Typers.scala:5301)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5348)
	at scala.tools.nsc.transform.Erasure$Eraser.typed1(Erasure.scala:698)
	at scala.tools.nsc.typechecker.Typers$Typer.runTyper$1(Typers.scala:5385)
	at scala.tools.nsc.typechecker.Typers$Typer.typedInternal(Typers.scala:5412)
	at scala.tools.nsc.typechecker.Typers$Typer.body$2(Typers.scala:5359)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5363)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5437)
	at scala.tools.nsc.transform.Erasure$ErasureTransformer.scala$tools$nsc$transform$Erasure$ErasureTransformer$$$anonfun$86(Erasure.scala:1167)
	at scala.tools.nsc.transform.Erasure$ErasureTransformer.transform(Erasure.scala:1163)
	at scala.tools.nsc.transform.Erasure$ErasureTransformer.transform(Erasure.scala:745)
	at scala.tools.nsc.ast.Trees$Transformer.transformUnit(Trees.scala:147)
	at scala.tools.nsc.transform.Transform$Phase.apply(Transform.scala:30)
	at scala.tools.nsc.Global$GlobalPhase.scala$tools$nsc$Global$GlobalPhase$$$anonfun$11(Global.scala:440)
	at scala.tools.nsc.Global$GlobalPhase.applyPhase(Global.scala:431)
	at scala.tools.nsc.Global$GlobalPhase.scala$tools$nsc$Global$GlobalPhase$$$anonfun$10(Global.scala:398)
	at scala.tools.nsc.Global$GlobalPhase.scala$tools$nsc$Global$GlobalPhase$$$anonfun$10$adapted(Global.scala:398)
	at scala.collection.AbstractIterator.foreach(Iterator.scala:1370)
	at scala.tools.nsc.Global$GlobalPhase.run(Global.scala:398)
	at scala.tools.nsc.Global$Run.compileUnitsInternal(Global.scala:1505)
	at scala.tools.nsc.Global$Run.compileUnits(Global.scala:1490)
	at scala.tools.nsc.Global$Run.compileSources(Global.scala:1485)
	at scala.tools.nsc.Global$Run.compile(Global.scala:1586)
	at xsbt.CachedCompiler0.run(CompilerInterface.scala:116)
	at xsbt.CachedCompiler0.run(CompilerInterface.scala:95)
	at xsbt.CompilerInterface.run(CompilerInterface.scala:26)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at sbt.compiler.AnalyzingCompiler.call(AnalyzingCompiler.scala:101)
	at sbt.compiler.AnalyzingCompiler.compile(AnalyzingCompiler.scala:47)
	at sbt.compiler.AnalyzingCompiler.compile(AnalyzingCompiler.scala:41)
	at sbt.compiler.MixedAnalyzingCompiler$$anonfun$compileScala$1$1.apply$mcV$sp(MixedAnalyzingCompiler.scala:51)
	at sbt.compiler.MixedAnalyzingCompiler$$anonfun$compileScala$1$1.apply(MixedAnalyzingCompiler.scala:51)
	at sbt.compiler.MixedAnalyzingCompiler$$anonfun$compileScala$1$1.apply(MixedAnalyzingCompiler.scala:51)
	at sbt.compiler.MixedAnalyzingCompiler.timed(MixedAnalyzingCompiler.scala:75)
	at sbt.compiler.MixedAnalyzingCompiler.compileScala$1(MixedAnalyzingCompiler.scala:50)
	at sbt.compiler.MixedAnalyzingCompiler.compile(MixedAnalyzingCompiler.scala:65)
	at sbt.compiler.IC$$anonfun$compileInternal$1.apply(IncrementalCompiler.scala:160)
	at sbt.compiler.IC$$anonfun$compileInternal$1.apply(IncrementalCompiler.scala:160)
	at sbt.inc.IncrementalCompile$$anonfun$doCompile$1.apply(Compile.scala:66)
	at sbt.inc.IncrementalCompile$$anonfun$doCompile$1.apply(Compile.scala:64)
	at sbt.inc.IncrementalCommon.cycle(IncrementalCommon.scala:31)
	at sbt.inc.Incremental$$anonfun$1.apply(Incremental.scala:62)
	at sbt.inc.Incremental$$anonfun$1.apply(Incremental.scala:61)
	at sbt.inc.Incremental$.manageClassfiles(Incremental.scala:89)
	at sbt.inc.Incremental$.compile(Incremental.scala:61)
	at sbt.inc.IncrementalCompile$.apply(Compile.scala:54)
	at sbt.compiler.IC$.compileInternal(IncrementalCompiler.scala:160)
	at sbt.compiler.IC$.incrementalCompile(IncrementalCompiler.scala:138)
	at sbt.Compiler$.compile(Compiler.scala:128)
	at sbt.Compiler$.compile(Compiler.scala:114)
	at sbt.Defaults$.sbt$Defaults$$compileIncrementalTaskImpl(Defaults.scala:829)
	at sbt.Defaults$$anonfun$compileIncrementalTask$1.apply(Defaults.scala:820)
	at sbt.Defaults$$anonfun$compileIncrementalTask$1.apply(Defaults.scala:818)
	at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
	at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:40)
	at sbt.std.Transform$$anon$4.work(System.scala:63)
	at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:226)
	at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:226)
	at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
	at sbt.Execute.work(Execute.scala:235)
	at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:226)
	at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:226)
	at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159)
	at sbt.CompletionService$$anon$2.call(CompletionService.scala:28)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
[error] (compile:compileIncremental) scala.reflect.internal.FatalError: 
[error]   unrecoverable error
[error]      while compiling: /Users/user/scalac-bug/Opt.scala
[error]         during phase: globalPhase=erasure, enteringPhase=posterasure
[error]      library version: version 2.12.0-M3
[error]     compiler version: version 2.12.0-M3
[error]   reconstructed args: -bootclasspath /Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/sunrsasign.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/classes:/Users/user/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.12.0-M3.jar -classpath /Users/user/scalac-bug/target/scala-2.12.0-M3/classes
[error] 
[error]   last tree to typer: TypeTree(class Object)
[error]        tree position: <unknown>
[error]             tree tpe: Object
[error]               symbol: class Object in package lang
[error]    symbol definition: class Object extends  (a ClassSymbol)
[error]       symbol package: java.lang
[error]        symbol owners: class Object
[error]            call site: object Main in package example in package example
[error] 
[error] <Cannot read source file>
[error] Total time: 3 s, completed 2015/11/03 7:45:15