scala> import scala.reflect.runtime.universe._
import scala.reflect.runtime.universe._

scala> case class X(s: String)
defined class X

scala> typeOf[X]
scala.reflect.internal.Types$TypeError: bad reference while unpickling $line11.$read: type AnyRef not found in scala.type
        at scala.reflect.internal.pickling.UnPickler$Scan.toTypeError(UnPickler.scala:832)
        at scala.reflect.internal.pickling.UnPickler$Scan$LazyTypeRef.complete(UnPickler.scala:846)
        at scala.reflect.internal.pickling.UnPickler$Scan$LazyTypeRef.load(UnPickler.scala:848)
        at scala.reflect.internal.Symbols$Symbol$$anonfun$typeParams$1.apply$mcV$sp(Symbols.scala:1625)
        at scala.reflect.internal.Symbols$Symbol$$anonfun$typeParams$1.apply(Symbols.scala:1625)
        at scala.reflect.internal.Symbols$Symbol$$anonfun$typeParams$1.apply(Symbols.scala:1625)
        at scala.reflect.internal.SymbolTable.atPhase(SymbolTable.scala:195)
        at scala.reflect.internal.Symbols$Symbol.typeParams(Symbols.scala:1625)
        at scala.reflect.internal.Types$NoArgsTypeRef.typeParams(Types.scala:2021)
        at scala.reflect.internal.Types$NoArgsTypeRef.isHigherKinded(Types.scala:2020)
        at scala.reflect.internal.Types$NoArgsTypeRef.normalizeImpl(Types.scala:2054)
        at scala.reflect.internal.Types$TypeRef.normalize(Types.scala:2235)
        at scala.reflect.internal.Definitions$DefinitionsClass.isFunctionType(Definitions.scala:648)
        at scala.reflect.internal.Types$TypeRef.customToString(Types.scala:2340)
        at scala.reflect.internal.Types$TypeRef.safeToString(Types.scala:2362)
        at scala.reflect.internal.Types$class.typeToString(Types.scala:6877)
        at scala.reflect.runtime.JavaUniverse.scala$reflect$runtime$SynchronizedTypes$$super$typeToString(JavaUniverse.scala:9)
        at scala.reflect.runtime.SynchronizedTypes$class.typeToString(SynchronizedTypes.scala:61)
        at scala.reflect.runtime.JavaUniverse.typeToString(JavaUniverse.scala:9)
        at scala.reflect.internal.Types$Type.toString(Types.scala:969)
        at scala.runtime.ScalaRunTime$.scala$runtime$ScalaRunTime$$inner$1(ScalaRunTime.scala:354)
        at scala.runtime.ScalaRunTime$.stringOf(ScalaRunTime.scala:359)
        at scala.runtime.ScalaRunTime$.replStringOf(ScalaRunTime.scala:367)
        at .<init>(<console>:10)
        at .<clinit>(<console>)
        at $print(<console>)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.call(IMain.scala:736)
        at scala.tools.nsc.interpreter.IMain$Request.loadAndRun(IMain.scala:991)
        at scala.tools.nsc.interpreter.IMain.loadAndRunReq$1(IMain.scala:579)
        at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:610)
        at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:574)
        at scala.tools.nsc.interpreter.ILoop.reallyInterpret$1(ILoop.scala:742)
        at scala.tools.nsc.interpreter.ILoop.interpretStartingWith(ILoop.scala:787)
        at scala.tools.nsc.interpreter.ILoop.command(ILoop.scala:699)
        at scala.tools.nsc.interpreter.ILoop.processLine$1(ILoop.scala:563)
        at scala.tools.nsc.interpreter.ILoop.innerLoop$1(ILoop.scala:570)
        at scala.tools.nsc.interpreter.ILoop.loop(ILoop.scala:573)
        at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply$mcZ$sp(ILoop.scala:864)
        at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:819)
        at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:819)
        at scala.tools.nsc.util.ScalaClassLoader$.savingContextLoader(ScalaClassLoader.scala:135)
        at scala.tools.nsc.interpreter.ILoop.process(ILoop.scala:819)
        at scala.tools.nsc.MainGenericRunner.runTarget$1(MainGenericRunner.scala:79)
        at scala.tools.nsc.MainGenericRunner.process(MainGenericRunner.scala:92)
        at scala.tools.nsc.MainGenericRunner$.main(MainGenericRunner.scala:101)
        at scala.tools.nsc.MainGenericRunner.main(MainGenericRunner.scala)