I think I broke the repl

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Jerzy Muller

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Feb 18, 2015, 11:12:36 AM2/18/15

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Windows 7, Scala 2.11.5, some random dabbling in repl:

[info] Starting scala interpreter...

[info]

Welcome to Scala version 2.11.5 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_25).

Type in expressions to have them evaluated.

Type :help for more information.

scala> trait A { val b: Any }

defined trait A

scala> new A { object b }

res0: A{object b} = $anon$1@4d114a30

scala> res0.b

java.lang.AssertionError: assertion failed: unsafe symbol $anon$1 (child of object $iw) in runtime reflection universe

at scala.reflect.internal.Symbols$Symbol.<init>(Symbols.scala:179)

at scala.reflect.internal.Symbols$TypeSymbol.<init>(Symbols.scala:2976)

at scala.reflect.internal.Symbols$ClassSymbol.<init>(Symbols.scala:3168)

at scala.reflect.internal.Symbols$StubClassSymbol.<init>(Symbols.scala:3463)

at scala.reflect.internal.Symbols$Symbol.newStubSymbol(Symbols.scala:493)

at scala.reflect.internal.pickling.UnPickler$Scan.readExtSymbol$1(UnPickler.scala:258)

at scala.reflect.internal.pickling.UnPickler$Scan.readSymbol(UnPickler.scala:284)

at scala.reflect.internal.pickling.UnPickler$Scan.readSymbolRef(UnPickler.scala:649)

at scala.reflect.internal.pickling.UnPickler$Scan.readExtSymbol$1(UnPickler.scala:207)

at scala.reflect.internal.pickling.UnPickler$Scan.readSymbol(UnPickler.scala:284)

at scala.reflect.internal.pickling.UnPickler$Scan.readSymbolRef(UnPickler.scala:649)

at scala.reflect.internal.pickling.UnPickler$Scan.readType(UnPickler.scala:417)

at scala.reflect.internal.pickling.UnPickler$Scan$$anonfun$2.apply(UnPickler.scala:360)

at scala.reflect.internal.pickling.UnPickler$Scan.at(UnPickler.scala:179)

at scala.reflect.internal.pickling.UnPickler$Scan.readSymbol(UnPickler.scala:360)

at scala.reflect.internal.pickling.UnPickler$Scan.run(UnPickler.scala:87)

at scala.reflect.internal.pickling.UnPickler.unpickle(UnPickler.scala:38)

at scala.reflect.runtime.JavaMirrors$JavaMirror.unpickleClass(JavaMirrors.scala:615)

at scala.reflect.runtime.SymbolLoaders$TopClassCompleter$$anonfun$complete$1.apply$mcV$sp(SymbolLoaders.scala:28)

at scala.reflect.runtime.SymbolLoaders$TopClassCompleter$$anonfun$complete$1.apply(SymbolLoaders.scala:25)

at scala.reflect.internal.SymbolTable.slowButSafeEnteringPhaseNotLaterThan(SymbolTable.scala:263)

at scala.reflect.runtime.SymbolLoaders$TopClassCompleter.complete(SymbolLoaders.scala:25)

at scala.reflect.runtime.SymbolLoaders$TopClassCompleter.load(SymbolLoaders.scala:33)

at scala.reflect.internal.Symbols$Symbol.exists(Symbols.scala:1050)

at scala.reflect.internal.Importers$StandardImporter.recreateOrRelink$1(Importers.scala:163)

at scala.reflect.internal.Importers$StandardImporter.importSymbol(Importers.scala:210)

at scala.reflect.internal.Importers$StandardImporter.importSymbol(Importers.scala:29)

at scala.tools.nsc.interpreter.IMain.getModuleIfDefined(IMain.scala:173)

at scala.tools.nsc.interpreter.IMain.readRootPath(IMain.scala:296)

at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.resolvePathToSymbol(IMain.scala:806)

at scala.tools.nsc.interpreter.IMain$Request.resultSymbol$lzycompute(IMain.scala:997)

at scala.tools.nsc.interpreter.IMain$Request.resultSymbol(IMain.scala:997)

at scala.tools.nsc.interpreter.IMain$Request$$anonfun$typeMap$1.apply(IMain.scala:1004)

at scala.reflect.internal.util.Collections$$anonfun$mapFrom$1.apply(Collections.scala:182)

at scala.collection.immutable.List.map(List.scala:273)

at scala.reflect.internal.util.Collections$class.mapFrom(Collections.scala:182)

at scala.reflect.internal.SymbolTable.mapFrom(SymbolTable.scala:16)

at scala.tools.nsc.interpreter.IMain$Request.typeMap(IMain.scala:1004)

at scala.tools.nsc.interpreter.IMain$Request.typeOf$lzycompute(IMain.scala:1009)

at scala.tools.nsc.interpreter.IMain$Request.typeOf(IMain.scala:1009)

at scala.tools.nsc.interpreter.IMain$Request.compile$lzycompute(IMain.scala:978)

at scala.tools.nsc.interpreter.IMain$Request.compile(IMain.scala:971)

at scala.tools.nsc.interpreter.IMain.compile(IMain.scala:568)

at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:556)

at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:554)

at scala.tools.nsc.interpreter.ILoop.reallyInterpret$1(ILoop.scala:802)

at scala.tools.nsc.interpreter.ILoop.interpretStartingWith(ILoop.scala:847)

at scala.tools.nsc.interpreter.ILoop.command(ILoop.scala:705)

at scala.tools.nsc.interpreter.ILoop.processLine(ILoop.scala:404)

at scala.tools.nsc.interpreter.ILoop.loop(ILoop.scala:430)

at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply$mcZ$sp(ILoop.scala:918)

at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:904)

at scala.reflect.internal.util.ScalaClassLoader$.savingContextLoader(ScalaClassLoader.scala:97)

at scala.tools.nsc.interpreter.ILoop.process(ILoop.scala:904)

at scala.tools.nsc.interpreter.ILoop.main(ILoop.scala:929)

at xsbt.ConsoleInterface.run(ConsoleInterface.scala:62)

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:483)

at sbt.compiler.AnalyzingCompiler.call(AnalyzingCompiler.scala:101)

at sbt.compiler.AnalyzingCompiler.console(AnalyzingCompiler.scala:76)

at sbt.Console.sbt$Console$$console0$1(Console.scala:22)

at sbt.Console$$anonfun$apply$2$$anonfun$apply$1.apply$mcV$sp(Console.scala:23)

at sbt.Console$$anonfun$apply$2$$anonfun$apply$1.apply(Console.scala:23)

at sbt.Logger$$anon$4.apply(Logger.scala:85)

at sbt.TrapExit$App.run(TrapExit.scala:248)

at java.lang.Thread.run(Thread.java:745)

java.lang.RuntimeException: error reading Scala signature of $line5.$read: assertion failed: unsafe symbol $anon$1 (child of object $iw) in runtime reflection universe

at scala.reflect.internal.pickling.UnPickler.unpickle(UnPickler.scala:46)