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TypeChecker AssertionError with private constructor access #5231

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scabug opened this Issue Nov 27, 2011 · 3 comments

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scabug commented Nov 27, 2011

The following crashes:

object Client {
   sealed trait ConfigLike {
      def clientID:     Int
   }

   object Config {
      def apply() : ConfigBuilder = new ConfigBuilder()
      implicit def build( cb: ConfigBuilder ) : Config = cb.build
   }

   final class Config private[Client]( val clientID: Int )
   extends ConfigLike

   final class ConfigBuilder private () extends ConfigLike {
      var clientID: Int = 0
      def build : Config = new Config( clientID )
   }
}

The crash is as follows:

java.lang.AssertionError: assertion failed: Config.this.build(new Client.this.ConfigBuilder)
	at scala.tools.nsc.typechecker.NamesDefaults$class.baseFunBlock$1(NamesDefaults.scala:228)
	at scala.tools.nsc.typechecker.NamesDefaults$class.transformNamedApplication(NamesDefaults.scala:337)
	at scala.tools.nsc.Global$analyzer$.transformNamedApplication(Global.scala:351)
	at scala.tools.nsc.typechecker.Typers$Typer.tryNamesDefaults$1(Typers.scala:2373)
	at scala.tools.nsc.typechecker.Typers$Typer.doTypedApply(Typers.scala:2411)
	at scala.tools.nsc.typechecker.Typers$Typer.typedApply$1(Typers.scala:3371)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:4104)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.transformedOrTyped(Typers.scala:4428)
	at scala.tools.nsc.typechecker.Typers$Typer.typedDefDef(Typers.scala:1760)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3919)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2100)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.collection.immutable.List.loop$1(List.scala:117)
	at scala.collection.immutable.List.mapConserve(List.scala:133)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1512)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1320)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3913)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2100)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.collection.immutable.List.loop$1(List.scala:117)
	at scala.collection.immutable.List.mapConserve(List.scala:133)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1512)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1320)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3913)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2100)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.collection.immutable.List.loop$1(List.scala:117)
	at scala.collection.immutable.List.mapConserve(List.scala:133)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1512)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1320)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3913)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2100)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.collection.immutable.List.loop$1(List.scala:117)
	at scala.collection.immutable.List.mapConserve(List.scala:133)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1512)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1320)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3913)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2100)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.collection.immutable.List.loop$1(List.scala:117)
	at scala.collection.immutable.List.mapConserve(List.scala:133)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1512)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1320)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3913)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2100)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.collection.immutable.List.loop$1(List.scala:117)
	at scala.collection.immutable.List.mapConserve(List.scala:133)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1512)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1320)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3913)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2100)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.collection.immutable.List.loop$1(List.scala:117)
	at scala.collection.immutable.List.mapConserve(List.scala:133)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1512)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1320)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3913)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2100)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.collection.immutable.List.loop$1(List.scala:117)
	at scala.collection.immutable.List.mapConserve(List.scala:133)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1512)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1320)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3913)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2100)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.collection.immutable.List.loop$1(List.scala:117)
	at scala.collection.immutable.List.mapConserve(List.scala:133)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1512)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1320)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3913)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2100)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.collection.immutable.List.loop$1(List.scala:117)
	at scala.collection.immutable.List.mapConserve(List.scala:133)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1512)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1320)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3913)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2100)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.collection.immutable.List.loop$1(List.scala:117)
	at scala.collection.immutable.List.mapConserve(List.scala:133)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1512)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1320)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3913)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2100)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.collection.immutable.List.loop$1(List.scala:117)
	at scala.collection.immutable.List.mapConserve(List.scala:133)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1512)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1320)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3913)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2100)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.collection.immutable.List.loop$1(List.scala:117)
	at scala.collection.immutable.List.mapConserve(List.scala:133)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1512)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1320)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3913)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2100)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.collection.immutable.List.loop$1(List.scala:117)
	at scala.collection.immutable.List.mapConserve(List.scala:133)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1512)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1320)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3913)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2100)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.collection.immutable.List.loop$1(List.scala:117)
	at scala.collection.immutable.List.mapConserve(List.scala:133)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1512)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1320)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3913)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2100)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.collection.immutable.List.loop$1(List.scala:117)
	at scala.collection.immutable.List.mapConserve(List.scala:133)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1512)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1320)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3913)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2100)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.collection.immutable.List.loop$1(List.scala:117)
	at scala.collection.immutable.List.mapConserve(List.scala:133)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1512)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1320)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3913)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2100)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.collection.immutable.List.loop$1(List.scala:117)
	at scala.collection.immutable.List.mapConserve(List.scala:133)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1512)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1320)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3913)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2100)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.collection.immutable.List.loop$1(List.scala:117)
	at scala.collection.immutable.List.mapConserve(List.scala:133)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1512)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1320)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3913)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2100)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$24.apply(Typers.scala:2184)
	at scala.collection.immutable.List.loop$1(List.scala:117)
	at scala.collection.immutable.List.mapConserve(List.scala:133)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2184)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:3906)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4271)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4331)
	at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3.apply(Analyzer.scala:94)
	at scala.tools.nsc.Global$GlobalPhase.applyPhase(Global.scala:329)
	at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3$$anonfun$run$1.apply(Analyzer.scala:86)
	at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3$$anonfun$run$1.apply(Analyzer.scala:86)
	at scala.collection.Iterator$class.foreach(Iterator.scala:660)
	at scala.collection.mutable.ListBuffer$$anon$1.foreach(ListBuffer.scala:316)
	at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3.run(Analyzer.scala:86)
	at scala.tools.nsc.Global$Run.compileSources(Global.scala:953)
	at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.compileAndSaveRun(IMain.scala:756)
	at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.compile(IMain.scala:731)
	at scala.tools.nsc.interpreter.IMain$Request.compile(IMain.scala:873)
	at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:576)
	at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:543)
	at de.sciss.scalainterpreter.ScalaInterpreterPane$$anonfun$interpret$1.apply(ScalaInterpreterPane.scala:211)
	at de.sciss.scalainterpreter.ScalaInterpreterPane$$anonfun$interpret$1.apply(ScalaInterpreterPane.scala:209)
	at scala.Option.foreach(Option.scala:197)
	at de.sciss.scalainterpreter.ScalaInterpreterPane.interpret(ScalaInterpreterPane.scala:209)
	at de.sciss.scalainterpreter.ScalaInterpreterPane$$anon$3$$anonfun$actionPerformed$1.apply(ScalaInterpreterPane.scala:160)
	at de.sciss.scalainterpreter.ScalaInterpreterPane$$anon$3$$anonfun$actionPerformed$1.apply(ScalaInterpreterPane.scala:160)
	at scala.Option.foreach(Option.scala:197)
	at de.sciss.scalainterpreter.ScalaInterpreterPane$$anon$3.actionPerformed(ScalaInterpreterPane.scala:160)
	at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1639)
	at javax.swing.JComponent.processKeyBinding(JComponent.java:2851)
	at javax.swing.JComponent.processKeyBindings(JComponent.java:2886)
	at javax.swing.JComponent.processKeyEvent(JComponent.java:2814)
	at de.sciss.scalainterpreter.ScalaInterpreterPane$$anon$1.processKeyEvent(ScalaInterpreterPane.scala:87)
	at java.awt.Component.processEvent(Component.java:6125)
	at java.awt.Container.processEvent(Container.java:2085)
	at java.awt.Component.dispatchEventImpl(Component.java:4714)
	at java.awt.Container.dispatchEventImpl(Container.java:2143)
	at java.awt.Component.dispatchEvent(Component.java:4544)
	at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1850)
	at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:712)
	at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:990)
	at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:855)
	at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:676)
	at java.awt.Component.dispatchEventImpl(Component.java:4586)
	at java.awt.Container.dispatchEventImpl(Container.java:2143)
	at java.awt.Window.dispatchEventImpl(Window.java:2478)
	at java.awt.Component.dispatchEvent(Component.java:4544)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:635)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

The actual mistake is that the private constructor of ConfigBuilder cannot be invoked, the corrected code would be

    final class ConfigBuilder private[Client] () extends ConfigLike ...
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scabug commented Nov 27, 2011

Imported From: https://issues.scala-lang.org/browse/SI-5231?orig=1
Reporter: @Sciss
Affected Versions: 2.9.1

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scabug commented Jul 12, 2012

@lrytz said:
minimized below - but see #6074

object T {
  def m = new ConfigBuilder()
  implicit def build( cb: ConfigBuilder ) : Config = null
}

class Config(x: Int)

class ConfigBuilder private ()  { }
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scabug commented Aug 4, 2012

@lrytz said:
fixed in scala/scala#1051

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