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Compiler crash with NoSuchElementException when combining "implicit class" and "AnyVal"/"case class" declaration #5667

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scabug opened this issue Apr 13, 2012 · 6 comments
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@scabug scabug commented Apr 13, 2012

scala> implicit case class Foo(i: Int)
error: 
     while compiling:  <console>
       current phase:  typer
     library version:  version 2.10.0-20120413-153403-c26ef91048
    compiler version:  version 2.10.0-20120413-153403-c26ef91048
  reconstructed args:  

uncaught exception during compilation: java.util.NoSuchElementException
java.util.NoSuchElementException: key not found: value Foo
	at scala.collection.MapLike$class.default(MapLike.scala:228)
	at scala.collection.AbstractMap.default(Map.scala:57)
	at scala.collection.mutable.HashMap.apply(HashMap.scala:63)
	at scala.tools.nsc.typechecker.MethodSynthesis$MethodSynth$class.addDerivedTrees(MethodSynthesis.scala:234)
	at scala.tools.nsc.typechecker.Namers$Namer.addDerivedTrees(Namers.scala:76)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$31.apply(Typers.scala:1658)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$31.apply(Typers.scala:1658)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$rewrappingWrapperTrees$1.apply(Typers.scala:1596)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$rewrappingWrapperTrees$1.apply(Typers.scala:1593)
	at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:247)
	at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:247)
	at scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.scala:59)
	at scala.collection.immutable.List.foreach(List.scala:77)
	at scala.collection.TraversableLike$class.flatMap(TraversableLike.scala:247)
	at scala.collection.AbstractTraversable.flatMap(Traversable.scala:112)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1658)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$30.apply(Typers.scala:1568)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$30.apply(Typers.scala:1568)
	at scala.tools.nsc.typechecker.Typers$Typer.typerReportAnyContextErrors(Typers.scala:501)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1567)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:4462)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4812)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2455)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$49$$anonfun$50.apply(Typers.scala:2551)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$49$$anonfun$50.apply(Typers.scala:2551)
	at scala.collection.immutable.List.loop$1(List.scala:163)
	at scala.collection.immutable.List.mapConserve(List.scala:179)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$49.apply(Typers.scala:2551)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$49.apply(Typers.scala:2550)
	at scala.tools.nsc.typechecker.Typers$Typer.withSavedContext(Typers.scala:510)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2550)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1660)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$30.apply(Typers.scala:1568)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$30.apply(Typers.scala:1568)
	at scala.tools.nsc.typechecker.Typers$Typer.typerReportAnyContextErrors(Typers.scala:501)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1567)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:4462)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4812)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2455)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$49$$anonfun$50.apply(Typers.scala:2551)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$49$$anonfun$50.apply(Typers.scala:2551)
	at scala.collection.immutable.List.loop$1(List.scala:163)
	at scala.collection.immutable.List.mapConserve(List.scala:179)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$49.apply(Typers.scala:2551)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$49.apply(Typers.scala:2550)
	at scala.tools.nsc.typechecker.Typers$Typer.withSavedContext(Typers.scala:510)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2550)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1660)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$30.apply(Typers.scala:1568)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$30.apply(Typers.scala:1568)
	at scala.tools.nsc.typechecker.Typers$Typer.typerReportAnyContextErrors(Typers.scala:501)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1567)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:4462)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4812)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2455)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$49$$anonfun$50.apply(Typers.scala:2551)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$49$$anonfun$50.apply(Typers.scala:2551)
	at scala.collection.immutable.List.loop$1(List.scala:163)
	at scala.collection.immutable.List.mapConserve(List.scala:179)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$49.apply(Typers.scala:2551)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$49.apply(Typers.scala:2550)
	at scala.tools.nsc.typechecker.Typers$Typer.withSavedContext(Typers.scala:510)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2550)
	at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1660)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$30.apply(Typers.scala:1568)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$30.apply(Typers.scala:1568)
	at scala.tools.nsc.typechecker.Typers$Typer.typerReportAnyContextErrors(Typers.scala:501)
	at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1567)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:4462)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4812)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStat$1(Typers.scala:2455)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$49$$anonfun$50.apply(Typers.scala:2551)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$49$$anonfun$50.apply(Typers.scala:2551)
	at scala.collection.immutable.List.loop$1(List.scala:163)
	at scala.collection.immutable.List.mapConserve(List.scala:179)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$49.apply(Typers.scala:2551)
	at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$49.apply(Typers.scala:2550)
	at scala.tools.nsc.typechecker.Typers$Typer.withSavedContext(Typers.scala:510)
	at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2550)
	at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:4455)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4812)
	at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:4870)
	at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3.apply(Analyzer.scala:96)
	at scala.tools.nsc.Global$GlobalPhase.applyPhase(Global.scala:423)
	at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3$$anonfun$run$1.apply(Analyzer.scala:88)
	at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3$$anonfun$run$1.apply(Analyzer.scala:88)
	at scala.collection.Iterator$class.foreach(Iterator.scala:697)
	at scala.collection.AbstractIterator.foreach(Iterator.scala:1124)
	at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3.run(Analyzer.scala:88)
	at scala.tools.nsc.Global$Run.compileUnitsInternal(Global.scala:1305)
	at scala.tools.nsc.Global$Run.compileUnits(Global.scala:1278)
	at scala.tools.nsc.Global$Run.compileSources(Global.scala:1272)
	at scala.tools.nsc.interpreter.IMain.compileSourcesKeepingRun(IMain.scala:455)
	at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.compileAndSaveRun(IMain.scala:837)
	at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.compile(IMain.scala:795)
	at scala.tools.nsc.interpreter.IMain$Request.compile(IMain.scala:968)
	at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:622)
	at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:589)
	at scala.tools.nsc.interpreter.ILoop.reallyInterpret$1(ILoop.scala:777)
	at scala.tools.nsc.interpreter.ILoop.interpretStartingWith(ILoop.scala:831)
	at scala.tools.nsc.interpreter.ILoop.command(ILoop.scala:734)
	at scala.tools.nsc.interpreter.ILoop.processLine$1(ILoop.scala:598)
	at scala.tools.nsc.interpreter.ILoop.innerLoop$1(ILoop.scala:605)
	at scala.tools.nsc.interpreter.ILoop.loop(ILoop.scala:608)
	at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply$mcZ$sp(ILoop.scala:911)
	at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:873)
	at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:873)
	at scala.tools.nsc.util.ScalaClassLoader$.savingContextLoader(ScalaClassLoader.scala:155)
	at scala.tools.nsc.interpreter.ILoop.process(ILoop.scala:873)
	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)
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@scabug scabug commented Apr 13, 2012

Imported From: https://issues.scala-lang.org/browse/SI-5667?orig=1
Reporter: @soc
Affected Versions: 2.10.0
Attachments:

  • Test.scala (created on Apr 16, 2012 3:44:55 PM UTC, 133 bytes)
  • Test.scala (created on Apr 16, 2012 3:44:08 PM UTC, 124 bytes)
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@scabug scabug commented Apr 16, 2012

@dcsobral said:
This also happens when combining SIP-13 with SIP-15. I'm uploading a test case.

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@scabug scabug commented Apr 16, 2012

@dcsobral said:
Copy of SIP-13's test case, with just "extends AnyVal" added.

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@scabug scabug commented Apr 16, 2012

@dcsobral said:
Copy of SIP-13's test case with "class" turned into "case class".

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@scabug scabug commented May 3, 2012

@szeiger said:
A case class is not needed. The combination of implicit class + extends AnyVal (which would be illegal for a case class) also causes this error:

object Main {
  implicit class C(val s: StringContext) extends AnyVal
}
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@scabug scabug commented May 4, 2012

@paulp said:
5c84dc85bf

Fix for implicit class / value class collision.

New this week, on SCALA.

Implicit class: "Spin me up an implicit method with my name."
   Value class: "I need a companion object, pronto."
      Narrator: "All was well with this arrangement... UNTIL."

What happens when these two wacky SIPs get together in the very
same class? You'll laugh until, eventually, you cry! Weeknights
at 9:30pm, only on SCALA.

Closes SI-5667.
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