$ ./scala
Welcome to Scala version 2.10.0-M7 (OpenJDK 64-Bit Server VM, Java 1.7.0_06-icedtea).
Type in expressions to have them evaluated.
Type :help for more information.

scala> :paerror: 
     while compiling: <console>
        during phase: global=erasure, atPhase=patmat
     library version: version 2.10.0-M7
    compiler version: version 2.10.0-M7
  reconstructed args: 

  last tree to typer: TypeTree(class Unit)
              symbol: class Unit in package scala (flags: final abstract)
   symbol definition: final abstract class Unit extends AnyVal
                 tpe: Unit
       symbol owners: class Unit -> package scala
      context owners: object $eval -> package $line1

== Enclosing template or block ==

ClassDef( // class $eval extends Object in package $line1
  <module>
  "$eval"
  []
  Template( // val <local $eval>: <notype> in object $eval, tree.tpe=type
    "java.lang.Object" // parents
    ValDef(
      private
      "_"
      <tpt>
      <empty>
    )
    // 5 statements
    DefDef( // def <init>(): type in object $eval
      <method>
      "<init>"
      []
      List(Nil)
      <tpt> // tree.tpe=type
      Block( // tree.tpe=Unit
        Apply( // def <init>(): Object in class Object, tree.tpe=Object
          $eval.super."<init>" // def <init>(): Object in class Object, tree.tpe=()Object
          Nil
        )
        ()
      )
    )
    ValDef( // private[this] var value: scala.tools.nsc.interpreter.IMain in object $eval
      private <mutable> <local> <defaultinit> <triedcooking>
      "value "
      <tpt> // tree.tpe=scala.tools.nsc.interpreter.IMain
      <empty>
    )
    DefDef( // def value(): scala.tools.nsc.interpreter.IMain in object $eval
      <method> <accessor> <defaultinit> <triedcooking>
      "value"
      []
      List(Nil)
      <tpt> // tree.tpe=scala.tools.nsc.interpreter.IMain
      $eval.this."value " // private[this] var value: scala.tools.nsc.interpreter.IMain in object $eval, tree.tpe=scala.tools.nsc.interpreter.IMain
    )
    DefDef( // def value_=(x$1: scala.tools.nsc.interpreter.IMain): Unit in object $eval
      <method> <accessor> <defaultinit> <triedcooking>
      "value_$eq"
      []
      // 1 parameter list
      ValDef( // x$1: scala.tools.nsc.interpreter.IMain
        <param> <synthetic> <triedcooking>
        "x$1"
        <tpt> // tree.tpe=scala.tools.nsc.interpreter.IMain
        <empty>
      )
      <tpt> // tree.tpe=Unit
      Assign( // tree.tpe=Unit
        $eval.this."value " // private[this] var value: scala.tools.nsc.interpreter.IMain in object $eval, tree.tpe=scala.tools.nsc.interpreter.IMain
        "x$1" // x$1: scala.tools.nsc.interpreter.IMain, tree.tpe=scala.tools.nsc.interpreter.IMain
      )
    )
    DefDef( // def set(x: Any): Unit in object $eval
      <method>
      "set"
      []
      // 1 parameter list
      ValDef( // x: Any
        <param> <triedcooking>
        "x"
        <tpt> // tree.tpe=Any
        <empty>
      )
      <tpt> // tree.tpe=Unit
      Apply( // def value_=(x$1: scala.tools.nsc.interpreter.IMain): Unit in object $eval, tree.tpe=Unit
        $eval.this."value_$eq" // def value_=(x$1: scala.tools.nsc.interpreter.IMain): Unit in object $eval, tree.tpe=(x$1: scala.tools.nsc.interpreter.IMain)Unit
        Apply( // final def asInstanceOf[T0]: T0 in class Any, tree.tpe=scala.tools.nsc.interpreter.IMain
          TypeApply( // final def asInstanceOf[T0]: T0 in class Any, tree.tpe=()scala.tools.nsc.interpreter.IMain
            "x"."asInstanceOf" // final def asInstanceOf[T0]: T0 in class Any, tree.tpe=[T0]()T0
            <tpt> // tree.tpe=scala.tools.nsc.interpreter.IMain
          )
          Nil
        )
      )
    )
  )
)

== Expanded type of tree ==

TypeRef(TypeSymbol(final abstract class Unit extends AnyVal))

uncaught exception during compilation: java.lang.AssertionError


Failed to initialize the REPL due to an unexpected error.
This is a bug, please, report it along with the error diagnostics printed below.
java.lang.AssertionError: assertion failed: 
     while compiling: <console>
        during phase: global=erasure, atPhase=explicitouter
     library version: version 2.10.0-M7
    compiler version: version 2.10.0-M7
  reconstructed args: 

  last tree to typer: TypeTree(class Unit)
              symbol: class Unit in package scala (flags: final abstract)
   symbol definition: final abstract class Unit extends AnyVal
                 tpe: Unit
       symbol owners: class Unit -> package scala
      context owners: object $eval -> package $line1

== Enclosing template or block ==

ClassDef( // class $eval extends Object in package $line1
  <module>
  "$eval"
  []
  Template( // val <local $eval>: <notype> in object $eval, tree.tpe=$line1.$eval.type
    "java.lang.Object" // parents
    ValDef(
      private
      "_"
      <tpt>
      <empty>
    )
    // 5 statements
    DefDef( // def <init>(): $line1.$eval.type in object $eval
      <method>
      "<init>"
      []
      List(Nil)
      <tpt> // tree.tpe=$line1.$eval.type
      Block( // tree.tpe=Unit
        Apply( // def <init>(): Object in class Object, tree.tpe=Object
          $eval.super."<init>" // def <init>(): Object in class Object, tree.tpe=()Object
          Nil
        )
        ()
      )
    )
    ValDef( // private[this] var value: scala.tools.nsc.interpreter.IMain in object $eval
      private <mutable> <local> <defaultinit> <triedcooking>
      "value "
      <tpt> // tree.tpe=scala.tools.nsc.interpreter.IMain
      <empty>
    )
    DefDef( // def value: scala.tools.nsc.interpreter.IMain in object $eval
      <method> <accessor> <defaultinit> <triedcooking>
      "value"
      []
      List(Nil)
      <tpt> // tree.tpe=scala.tools.nsc.interpreter.IMain
      $eval.this."value " // private[this] var value: scala.tools.nsc.interpreter.IMain in object $eval, tree.tpe=scala.tools.nsc.interpreter.IMain
    )
    DefDef( // def value_=(x$1: scala.tools.nsc.interpreter.IMain): Unit in object $eval
      <method> <accessor> <defaultinit> <triedcooking>
      "value_$eq"
      []
      // 1 parameter list
      ValDef( // x$1: scala.tools.nsc.interpreter.IMain
        <param> <synthetic> <triedcooking>
        "x$1"
        <tpt> // tree.tpe=scala.tools.nsc.interpreter.IMain
        <empty>
      )
      <tpt> // tree.tpe=Unit
      Assign( // tree.tpe=Unit
        $eval.this."value " // private[this] var value: scala.tools.nsc.interpreter.IMain in object $eval, tree.tpe=scala.tools.nsc.interpreter.IMain
        "x$1" // x$1: scala.tools.nsc.interpreter.IMain, tree.tpe=scala.tools.nsc.interpreter.IMain
      )
    )
    DefDef( // def set(x: Any): Unit in object $eval
      <method>
      "set"
      []
      // 1 parameter list
      ValDef( // x: Any
        <param> <triedcooking>
        "x"
        <tpt> // tree.tpe=Any
        <empty>
      )
      <tpt> // tree.tpe=Unit
      Apply( // def value_=(x$1: scala.tools.nsc.interpreter.IMain): Unit in object $eval, tree.tpe=Unit
        $eval.this."value_$eq" // def value_=(x$1: scala.tools.nsc.interpreter.IMain): Unit in object $eval, tree.tpe=(x$1: scala.tools.nsc.interpreter.IMain)Unit
        Apply( // final def asInstanceOf[T0](): T0 in class Any, tree.tpe=scala.tools.nsc.interpreter.IMain
          TypeApply( // final def asInstanceOf[T0]: T0 in class Any, tree.tpe=()scala.tools.nsc.interpreter.IMain
            "x"."asInstanceOf" // final def asInstanceOf[T0]: T0 in class Any, tree.tpe=[T0]()T0
            <tpt> // tree.tpe=scala.tools.nsc.interpreter.IMain
          )
          Nil
        )
      )
    )
  )
)

== Expanded type of tree ==

TypeRef(TypeSymbol(final abstract class Unit extends AnyVal))

explicitouter
        at scala.Predef$.assert(Predef.scala:173)
        at scala.tools.nsc.Global.assert(Global.scala:231)
        at scala.tools.nsc.transform.Erasure$ErasureTransformer.bridgeDefs(Erasure.scala:903)
        at scala.tools.nsc.transform.Erasure$ErasureTransformer.addBridges(Erasure.scala:911)
        at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.preErase(Erasure.scala:1136)
        at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:1170)
        at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:933)
        at scala.reflect.api.Trees$Transformer.transformTemplate(Trees.scala:661)
        at scala.reflect.internal.Trees$$anonfun$itransform$4.apply(Trees.scala:1221)
        at scala.reflect.internal.Trees$$anonfun$itransform$4.apply(Trees.scala:1220)
        at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:684)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:34)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:28)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:19)
        at scala.reflect.internal.Trees$class.itransform(Trees.scala:1219)
        at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:12)
        at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:12)
        at scala.reflect.api.Trees$Transformer.transform(Trees.scala:656)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:48)
        at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:1182)
        at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:933)
        at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:677)
        at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:675)
        at scala.collection.immutable.List.loop$1(List.scala:164)
        at scala.collection.immutable.List.mapConserve(List.scala:180)
        at scala.reflect.api.Trees$Transformer.transformStats(Trees.scala:675)
        at scala.reflect.internal.Trees$$anonfun$itransform$7.apply(Trees.scala:1239)
        at scala.reflect.internal.Trees$$anonfun$itransform$7.apply(Trees.scala:1239)
        at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:684)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:34)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:28)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:19)
        at scala.reflect.internal.Trees$class.itransform(Trees.scala:1238)
        at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:12)
        at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:12)
        at scala.reflect.api.Trees$Transformer.transform(Trees.scala:656)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.scala$tools$nsc$transform$TypingTransformers$TypingTransformer$$super$transform(TypingTransformers.scala:44)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$2.apply(TypingTransformers.scala:46)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$2.apply(TypingTransformers.scala:46)
        at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:684)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:34)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:28)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:46)
        at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:1182)
        at scala.tools.nsc.transform.Erasure$ErasureTransformer.transform(Erasure.scala:1192)
        at scala.tools.nsc.transform.Erasure$ErasureTransformer.transform(Erasure.scala:807)
        at scala.tools.nsc.ast.Trees$Transformer.transformUnit(Trees.scala:227)
        at scala.tools.nsc.transform.Transform$Phase.apply(Transform.scala:30)
        at scala.tools.nsc.Global$GlobalPhase.applyPhase(Global.scala:455)
        at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:422)
        at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:422)
        at scala.collection.Iterator$class.foreach(Iterator.scala:726)
        at scala.collection.AbstractIterator.foreach(Iterator.scala:1155)
        at scala.tools.nsc.Global$GlobalPhase.run(Global.scala:422)
        at scala.tools.nsc.Global$Run.compileUnitsInternal(Global.scala:1566)
        at scala.tools.nsc.Global$Run.compileUnits(Global.scala:1540)
        at scala.tools.nsc.Global$Run.compileSources(Global.scala:1536)
        at scala.tools.nsc.interpreter.IMain.compileSourcesKeepingRun(IMain.scala:426)
        at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.compileAndSaveRun(IMain.scala:799)
        at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.compile(IMain.scala:759)
        at scala.tools.nsc.interpreter.IMain.bind(IMain.scala:616)
        at scala.tools.nsc.interpreter.IMain.bind(IMain.scala:659)
        at scala.tools.nsc.interpreter.IMain$$anonfun$quietBind$1.apply(IMain.scala:658)
        at scala.tools.nsc.interpreter.IMain$$anonfun$quietBind$1.apply(IMain.scala:658)
        at scala.tools.nsc.interpreter.IMain.beQuietDuring(IMain.scala:232)
        at scala.tools.nsc.interpreter.IMain.quietBind(IMain.scala:658)
        at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1$$anonfun$apply$mcZ$sp$2.apply$mcV$sp(ILoop.scala:838)
        at scala.tools.nsc.interpreter.ILoopInit$class.runThunks(ILoopInit.scala:122)
        at scala.tools.nsc.interpreter.ILoop.runThunks(ILoop.scala:42)
        at scala.tools.nsc.interpreter.ILoopInit$class.postInitialization(ILoopInit.scala:95)
        at scala.tools.nsc.interpreter.ILoop.postInitialization(ILoop.scala:42)
        at scala.tools.nsc.interpreter.ILoopInit$$anonfun$createAsyncListener$1.apply$mcV$sp(ILoopInit.scala:63)
        at scala.tools.nsc.interpreter.ILoopInit$$anonfun$createAsyncListener$1.apply(ILoopInit.scala:60)
        at scala.tools.nsc.interpreter.ILoopInit$$anonfun$createAsyncListener$1.apply(ILoopInit.scala:60)
        at scala.tools.nsc.io.package$$anon$3.call(package.scala:23)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
        at java.lang.Thread.run(Thread.java:722)




$ ./scala
Welcome to Scala version 2.10.0-M7 (OpenJDK 64-Bit Server VM, Java 1.7.0_06-icedtea).
Type in expressions to have them evaluated.
Type :help for more information.

scala> :pa
error: 
     while compiling: <console>
        during phase: global=erasure, atPhase=patmat
     library version: version 2.10.0-M7
    compiler version: version 2.10.0-M7
  reconstructed args: 

  last tree to typer: TypeTree(class Unit)
              symbol: class Unit in package scala (flags: final abstract)
   symbol definition: final abstract class Unit extends AnyVal
                 tpe: Unit
       symbol owners: class Unit -> package scala
      context owners: object $eval -> package $line1

== Enclosing template or block ==

ClassDef( // class $eval extends Object in package $line1
  <module>
  "$eval"
  []
  Template( // val <local $eval>: <notype> in object $eval, tree.tpe=type
    "java.lang.Object" // parents
    ValDef(
      private
      "_"
      <tpt>
      <empty>
    )
    // 5 statements
    DefDef( // def <init>(): type in object $eval
      <method>
      "<init>"
      []
      List(Nil)
      <tpt> // tree.tpe=type
      Block( // tree.tpe=Unit
        Apply( // def <init>(): Object in class Object, tree.tpe=Object
          $eval.super."<init>" // def <init>(): Object in class Object, tree.tpe=()Object
          Nil
        )
        ()
      )
    )
    ValDef( // private[this] var value: scala.tools.nsc.interpreter.IMain in object $eval
      private <mutable> <local> <defaultinit> <triedcooking>
      "value "
      <tpt> // tree.tpe=scala.tools.nsc.interpreter.IMain
      <empty>
    )
    DefDef( // def value: scala.tools.nsc.interpreter.IMain in object $eval
      <method> <accessor> <defaultinit> <triedcooking>
      "value"
      []
      List(Nil)
      <tpt> // tree.tpe=scala.tools.nsc.interpreter.IMain
      $eval.this."value " // private[this] var value: scala.tools.nsc.interpreter.IMain in object $eval, tree.tpe=scala.tools.nsc.interpreter.IMain
    )
    DefDef( // def value_=(x$1: scala.tools.nsc.interpreter.IMain): Unit in object $eval
      <method> <accessor> <defaultinit> <triedcooking>
      "value_$eq"
      []
      // 1 parameter list
      ValDef( // x$1: scala.tools.nsc.interpreter.IMain
        <param> <synthetic> <triedcooking>
        "x$1"
        <tpt> // tree.tpe=scala.tools.nsc.interpreter.IMain
        <empty>
      )
      <tpt> // tree.tpe=Unit
      Assign( // tree.tpe=Unit
        $eval.this."value " // private[this] var value: scala.tools.nsc.interpreter.IMain in object $eval, tree.tpe=scala.tools.nsc.interpreter.IMain
        "x$1" // x$1: scala.tools.nsc.interpreter.IMain, tree.tpe=scala.tools.nsc.interpreter.IMain
      )
    )
    DefDef( // def set(x: Any): Unit in object $eval
      <method>
      "set"
      []
      // 1 parameter list
      ValDef( // x: Any
        <param> <triedcooking>
        "x"
        <tpt> // tree.tpe=Any
        <empty>
      )
      <tpt> // tree.tpe=Unit
      Apply( // def value_=(x$1: scala.tools.nsc.interpreter.IMain): Unit in object $eval, tree.tpe=Unit
        $eval.this."value_$eq" // def value_=(x$1: scala.tools.nsc.interpreter.IMain): Unit in object $eval, tree.tpe=(x$1: scala.tools.nsc.interpreter.IMain)Unit
        Apply( // final def asInstanceOf[T0]: T0 in class Any, tree.tpe=scala.tools.nsc.interpreter.IMain
          TypeApply( // final def asInstanceOf[T0]: T0 in class Any, tree.tpe=()scala.tools.nsc.interpreter.IMain
            "x"."asInstanceOf" // final def asInstanceOf[T0]: T0 in class Any, tree.tpe=[T0]()T0
            <tpt> // tree.tpe=scala.tools.nsc.interpreter.IMain
          )
          Nil
        )
      )
    )
  )
)

== Expanded type of tree ==

TypeRef(TypeSymbol(final abstract class Unit extends AnyVal))

uncaught exception during compilation: java.lang.AssertionError

Failed to initialize the REPL due to an unexpected error.
This is a bug, please, report it along with the error diagnostics printed below.
java.lang.AssertionError: assertion failed: 
     while compiling: <console>
        during phase: global=erasure, atPhase=patmat
     library version: version 2.10.0-M7
    compiler version: version 2.10.0-M7
  reconstructed args: 

  last tree to typer: TypeTree(class Unit)
              symbol: class Unit in package scala (flags: final abstract)
   symbol definition: final abstract class Unit extends AnyVal
                 tpe: Unit
       symbol owners: class Unit -> package scala
      context owners: object $eval -> package $line1

== Enclosing template or block ==

ClassDef( // class $eval extends Object in package $line1
  <module>
  "$eval"
  []
  Template( // val <local $eval>: <notype> in object $eval, tree.tpe=$line1.$eval.type
    "java.lang.Object" // parents
    ValDef(
      private
      "_"
      <tpt>
      <empty>
    )
    // 5 statements
    DefDef( // def <init>(): $line1.$eval.type in object $eval
      <method>
      "<init>"
      []
      List(Nil)
      <tpt> // tree.tpe=$line1.$eval.type
      Block( // tree.tpe=Unit
        Apply( // def <init>(): Object in class Object, tree.tpe=Object
          $eval.super."<init>" // def <init>(): Object in class Object, tree.tpe=()Object
          Nil
        )
        ()
      )
    )
    ValDef( // private[this] var value: scala.tools.nsc.interpreter.IMain in object $eval
      private <mutable> <local> <defaultinit> <triedcooking>
      "value "
      <tpt> // tree.tpe=scala.tools.nsc.interpreter.IMain
      <empty>
    )
    DefDef( // def value: scala.tools.nsc.interpreter.IMain in object $eval
      <method> <accessor> <defaultinit> <triedcooking>
      "value"
      []
      List(Nil)
      <tpt> // tree.tpe=scala.tools.nsc.interpreter.IMain
      $eval.this."value " // private[this] var value: scala.tools.nsc.interpreter.IMain in object $eval, tree.tpe=scala.tools.nsc.interpreter.IMain
    )
    DefDef( // def value_=(x$1: scala.tools.nsc.interpreter.IMain): Unit in object $eval
      <method> <accessor> <defaultinit> <triedcooking>
      "value_$eq"
      []
      // 1 parameter list
      ValDef( // x$1: scala.tools.nsc.interpreter.IMain
        <param> <synthetic> <triedcooking>
        "x$1"
        <tpt> // tree.tpe=scala.tools.nsc.interpreter.IMain
        <empty>
      )
      <tpt> // tree.tpe=Unit
      Assign( // tree.tpe=Unit
        $eval.this."value " // private[this] var value: scala.tools.nsc.interpreter.IMain in object $eval, tree.tpe=scala.tools.nsc.interpreter.IMain
        "x$1" // x$1: scala.tools.nsc.interpreter.IMain, tree.tpe=scala.tools.nsc.interpreter.IMain
      )
    )
    DefDef( // def set(x: Any): Unit in object $eval
      <method>
      "set"
      []
      // 1 parameter list
      ValDef( // x: Any
        <param> <triedcooking>
        "x"
        <tpt> // tree.tpe=Any
        <empty>
      )
      <tpt> // tree.tpe=Unit
      Apply( // def value_=(x$1: scala.tools.nsc.interpreter.IMain): Unit in object $eval, tree.tpe=Unit
        $eval.this."value_$eq" // def value_=(x$1: scala.tools.nsc.interpreter.IMain): Unit in object $eval, tree.tpe=(x$1: scala.tools.nsc.interpreter.IMain)Unit
        Apply( // final def asInstanceOf[T0]: T0 in class Any, tree.tpe=scala.tools.nsc.interpreter.IMain
          TypeApply( // final def asInstanceOf[T0]: T0 in class Any, tree.tpe=()scala.tools.nsc.interpreter.IMain
            "x"."asInstanceOf" // final def asInstanceOf[T0]: T0 in class Any, tree.tpe=[T0]()T0
            <tpt> // tree.tpe=scala.tools.nsc.interpreter.IMain
          )
          Nil
        )
      )
    )
  )
)

== Expanded type of tree ==

TypeRef(TypeSymbol(final abstract class Unit extends AnyVal))

patmat
        at scala.Predef$.assert(Predef.scala:173)
        at scala.tools.nsc.Global.assert(Global.scala:231)
        at scala.tools.nsc.transform.Erasure$ErasureTransformer.bridgeDefs(Erasure.scala:903)
        at scala.tools.nsc.transform.Erasure$ErasureTransformer.addBridges(Erasure.scala:911)
        at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.preErase(Erasure.scala:1136)
        at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:1170)
        at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:933)
        at scala.reflect.api.Trees$Transformer.transformTemplate(Trees.scala:661)
        at scala.reflect.internal.Trees$$anonfun$itransform$4.apply(Trees.scala:1221)
        at scala.reflect.internal.Trees$$anonfun$itransform$4.apply(Trees.scala:1220)
        at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:684)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:34)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:28)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:19)
        at scala.reflect.internal.Trees$class.itransform(Trees.scala:1219)
        at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:12)
        at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:12)
        at scala.reflect.api.Trees$Transformer.transform(Trees.scala:656)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:48)
        at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:1182)
        at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:933)
        at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:677)
        at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:675)
        at scala.collection.immutable.List.loop$1(List.scala:164)
        at scala.collection.immutable.List.mapConserve(List.scala:180)
        at scala.reflect.api.Trees$Transformer.transformStats(Trees.scala:675)
        at scala.reflect.internal.Trees$$anonfun$itransform$7.apply(Trees.scala:1239)
        at scala.reflect.internal.Trees$$anonfun$itransform$7.apply(Trees.scala:1239)
        at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:684)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:34)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:28)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:19)
        at scala.reflect.internal.Trees$class.itransform(Trees.scala:1238)
        at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:12)
        at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:12)
        at scala.reflect.api.Trees$Transformer.transform(Trees.scala:656)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.scala$tools$nsc$transform$TypingTransformers$TypingTransformer$$super$transform(TypingTransformers.scala:44)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$2.apply(TypingTransformers.scala:46)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$2.apply(TypingTransformers.scala:46)
        at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:684)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:34)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:28)
        at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:46)
        at scala.tools.nsc.transform.Erasure$ErasureTransformer$$anon$1.transform(Erasure.scala:1182)
        at scala.tools.nsc.transform.Erasure$ErasureTransformer.transform(Erasure.scala:1192)
        at scala.tools.nsc.transform.Erasure$ErasureTransformer.transform(Erasure.scala:807)
        at scala.tools.nsc.ast.Trees$Transformer.transformUnit(Trees.scala:227)
        at scala.tools.nsc.transform.Transform$Phase.apply(Transform.scala:30)
        at scala.tools.nsc.Global$GlobalPhase.applyPhase(Global.scala:455)
        at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:422)
        at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:422)
        at scala.collection.Iterator$class.foreach(Iterator.scala:726)
        at scala.collection.AbstractIterator.foreach(Iterator.scala:1155)
        at scala.tools.nsc.Global$GlobalPhase.run(Global.scala:422)
        at scala.tools.nsc.Global$Run.compileUnitsInternal(Global.scala:1566)
        at scala.tools.nsc.Global$Run.compileUnits(Global.scala:1540)
        at scala.tools.nsc.Global$Run.compileSources(Global.scala:1536)
        at scala.tools.nsc.interpreter.IMain.compileSourcesKeepingRun(IMain.scala:426)
        at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.compileAndSaveRun(IMain.scala:799)
        at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.compile(IMain.scala:759)
        at scala.tools.nsc.interpreter.IMain.bind(IMain.scala:616)
        at scala.tools.nsc.interpreter.IMain.bind(IMain.scala:659)
        at scala.tools.nsc.interpreter.IMain$$anonfun$quietBind$1.apply(IMain.scala:658)
        at scala.tools.nsc.interpreter.IMain$$anonfun$quietBind$1.apply(IMain.scala:658)
        at scala.tools.nsc.interpreter.IMain.beQuietDuring(IMain.scala:232)
        at scala.tools.nsc.interpreter.IMain.quietBind(IMain.scala:658)
        at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1$$anonfun$apply$mcZ$sp$2.apply$mcV$sp(ILoop.scala:838)
        at scala.tools.nsc.interpreter.ILoopInit$class.runThunks(ILoopInit.scala:122)
        at scala.tools.nsc.interpreter.ILoop.runThunks(ILoop.scala:42)
        at scala.tools.nsc.interpreter.ILoopInit$class.postInitialization(ILoopInit.scala:95)
        at scala.tools.nsc.interpreter.ILoop.postInitialization(ILoop.scala:42)
        at scala.tools.nsc.interpreter.ILoopInit$$anonfun$createAsyncListener$1.apply$mcV$sp(ILoopInit.scala:63)
        at scala.tools.nsc.interpreter.ILoopInit$$anonfun$createAsyncListener$1.apply(ILoopInit.scala:60)
        at scala.tools.nsc.interpreter.ILoopInit$$anonfun$createAsyncListener$1.apply(ILoopInit.scala:60)
        at scala.tools.nsc.io.package$$anon$3.call(package.scala:23)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
        at java.lang.Thread.run(Thread.java:722)
.