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Compiler crash with multiple param lists, defaults, erroneous argument to secondary param list. #6907

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scabug opened this issue Jan 3, 2013 · 3 comments
Closed

Compiler crash with multiple param lists, defaults, erroneous argument to secondary param list. #6907

scabug opened this issue Jan 3, 2013 · 3 comments
Labels
compiler crash duplicate regression usability
Milestone
2.10.1

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@scabug
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scabug commented Jan 3, 2013 

class M {
  def g[A](a: Any = null)(f: A) {}
}

trait I {
  def m: M = ???
}

class Test extends I {
  def g1[A](a: Any = null)(f: A) {}

  def foo(a: MissingType) {
    m.g(/* use default */)(a)
  }
}
error: 
     while compiling: <console>
        during phase: typer
     library version: version 2.10.0
    compiler version: version 2.10.0
  reconstructed args: -deprecation -classpath C:\Users\zgg\.sbt\boot\scala-2.10.0\lib\scala-compiler.jar;C:\Users\zgg\.sbt\boot\scala-2.10.0\lib\jansi.jar;C:\Users\zgg\.sbt\boot\scala-2.10.0\lib\jline.jar;C:\Users\zgg\.sbt\boot\scala-2.10.0\lib\scala-reflect.jar -unchecked -bootclasspath c:\tools\jdk1.6.0_25\jre\lib\resources.jar;c:\tools\jdk1.6.0_25\jre\lib\rt.jar;c:\tools\jdk1.6.0_25\jre\lib\sunrsasign.jar;c:\tools\jdk1.6.0_25\jre\lib\jsse.jar;c:\tools\jdk1.6.0_25\jre\lib\jce.jar;c:\tools\jdk1.6.0_25\jre\lib\charsets.jar;c:\tools\jdk1.6.0_25\jre\lib\modules\jdk.boot.jar;c:\tools\jdk1.6.0_25\jre\classes;C:\Users\zgg\.sbt\boot\scala-2.10.0\lib\scala-library.jar -Yrepl-sync

  last tree to typer: Ident(a)
              symbol: value a (flags: <param> <triedcooking>)
   symbol definition: a: <error>
                 tpe: <error>
       symbol owners: value a -> method foo -> class Test -> object $iw -> object $iw -> object $read -> package $line10
      context owners: method foo -> class Test -> object $iw -> object $iw -> object $read -> package $line10

== Expanded type of tree ==

<error>

uncaught exception during compilation: java.lang.NullPointerException
java.lang.NullPointerException
	at scala.tools.nsc.typechecker.Typers$Typer.adapt(Typers.scala:1131)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5467)
	at scala.tools.nsc.interpreter.ReplGlobal$$anon$1$$anon$2.typed(ReplGlobal.scala:29)
	at scala.tools.nsc.typechecker.Typers$Typer.transformedOrTyped(Typers.scala:5658)
	at scala.tools.nsc.typechecker.Typers$Typer.typedDefDef(Typers.scala:2169)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5386)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5458)
	at scala.tools.nsc.interpreter.ReplGlobal$$anon$1$$anon$2.typed(ReplGlobal.scala:29)
	at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$typedStat$1(Typers.scala:2770)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$55.apply(Typers.scala:2870)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$55.apply(Typers.scala:2870)
	at scala.collection.immutable.List.loop$1(List.scala:164)
	at scala.collection.immutable.List.mapConserve(List.scala:180)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2870)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1862)
	at scala.tools.nsc.typechecker.Typers$Typer.typedClassDef(Typers.scala:1726)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5400)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5458)
	at scala.tools.nsc.interpreter.ReplGlobal$$anon$1$$anon$2.typed(ReplGlobal.scala:29)
	at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$typedStat$1(Typers.scala:2770)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$55.apply(Typers.scala:2870)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$55.apply(Typers.scala:2870)

The example was distilled from typical Scala usage of Yammer's metrics library.
@scabug
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scabug commented Jan 3, 2013

Imported From: https://issues.scala-lang.org/browse/SI-6907?orig=1
Reporter: @retronym
Assignee: @JamesIry
Affected Versions: 2.10.0-M6
Duplicates #6829

@scabug
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scabug commented Jan 4, 2013

@JamesIry said:
Looks like a dup of #6829 which Paul fixed already

@scabug
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scabug commented Jan 4, 2013

@JamesIry said:
Confirmed. Crashes under 2.10.0 final but gives proper "error: not found: type MissingType" using the current 2.10.x branch.

@scabug scabug closed this as completed Jan 4, 2013
@scabug scabug added this to the 2.10.1 milestone Apr 7, 2017
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compiler crash duplicate regression usability
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