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ICE: java.util.NoSuchElementException: head of empty list, at dotty.tools.dotc.core.SymDenotations$SymDenotation.recurWithParamss$1(SymDenotations.scala:312) #12455

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chengniansun opened this issue May 13, 2021 · 1 comment
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ICE: java.util.NoSuchElementException: head of empty list, at dotty.tools.dotc.core.SymDenotations$SymDenotation.recurWithParamss$1(SymDenotations.scala:312) #12455

chengniansun opened this issue May 13, 2021 · 1 comment
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fuzzball itype:bug itype:crash

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@chengniansun
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Compiler Version

Scala compiler version 3.0.1-RC1-bin-SNAPSHOT-git-4410752 -- Copyright 2002-2021, LAMP/EPFL

System Information

Linux 5.4.0-66-generic x86_64 GNU/Linux

Minimized Code

class A { util.Random shuffle }

Output (click arrow to expand)

-- Error: mutant.scala:1:15 -----------------------------------------------------------------------------------------------------------------
1 |class A { util.Random shuffle }
  |          ^^^^^^^^^^^
  |          postfix operator `shuffle` needs to be enabled
  |          by making the implicit value scala.language.postfixOps visible.
  |          ----
  |          This can be achieved by adding the import clause 'import scala.language.postfixOps'
  |          or by setting the compiler option -language:postfixOps.
  |          See the Scaladoc for value scala.language.postfixOps for a discussion
  |          why the feature needs to be explicitly enabled.
exception occurred while typechecking mutant.scala
exception occurred while compiling mutant.scala
java.util.NoSuchElementException: head of empty list while compiling mutant.scala
Exception in thread "main" java.util.NoSuchElementException: head of empty list
	at scala.collection.immutable.Nil$.head(List.scala:629)
	at scala.collection.immutable.Nil$.head(List.scala:628)
	at dotty.tools.dotc.core.SymDenotations$SymDenotation.recurWithParamss$1(SymDenotations.scala:312)
	at dotty.tools.dotc.core.SymDenotations$SymDenotation.recurWithParamss$1(SymDenotations.scala:312)
	at dotty.tools.dotc.core.SymDenotations$SymDenotation.recurWithParamss$1(SymDenotations.scala:312)
	at dotty.tools.dotc.core.SymDenotations$SymDenotation.paramSymss(SymDenotations.scala:329)
	at dotty.tools.dotc.typer.Typer.paramSymWithMethodTree$3(Typer.scala:3332)
	at dotty.tools.dotc.typer.Typer.issueErrors$1$$anonfun$1$$anonfun$1(Typer.scala:3344)
	at dotty.tools.dotc.reporting.NoExplanation.msg(Message.scala:133)
	at dotty.tools.dotc.reporting.Message.message(Message.scala:88)
	at dotty.tools.dotc.reporting.Message.isNonSensical(Message.scala:100)
	at dotty.tools.dotc.reporting.HideNonSensicalMessages.isHidden(HideNonSensicalMessages.scala:16)
	at dotty.tools.dotc.reporting.HideNonSensicalMessages.isHidden$(HideNonSensicalMessages.scala:10)
	at dotty.tools.dotc.reporting.AbstractReporter.isHidden(AbstractReporter.scala:8)
	at dotty.tools.dotc.reporting.Reporter.report(Reporter.scala:148)
	at dotty.tools.dotc.report$.error(report.scala:71)
	at dotty.tools.dotc.typer.Typer.issueErrors$2$$anonfun$2(Typer.scala:3346)
	at scala.runtime.function.JProcedure3.apply(JProcedure3.java:15)
	at scala.runtime.function.JProcedure3.apply(JProcedure3.java:10)
	at scala.collection.LazyZip3.foreach(LazyZipOps.scala:248)
	at dotty.tools.dotc.typer.Typer.issueErrors$3(Typer.scala:3348)
	at dotty.tools.dotc.typer.Typer.addImplicitArgs$3(Typer.scala:3374)
	at dotty.tools.dotc.typer.Typer.adaptNoArgsImplicitMethod$2(Typer.scala:3391)
	at dotty.tools.dotc.typer.Typer.adaptNoArgs$1(Typer.scala:3588)
	at dotty.tools.dotc.typer.Typer.adapt1(Typer.scala:3801)
	at dotty.tools.dotc.typer.Typer.adapt(Typer.scala:3153)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2813)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2817)
	at dotty.tools.dotc.typer.Namer.typedAheadExpr$$anonfun$1(Namer.scala:1392)
	at dotty.tools.dotc.typer.Namer.typedAhead(Namer.scala:1379)
	at dotty.tools.dotc.typer.Namer.typedAheadExpr(Namer.scala:1392)
	at dotty.tools.dotc.typer.Namer.typedAheadRhs$1$$anonfun$1(Namer.scala:1544)
	at dotty.tools.dotc.typer.PrepareInlineable$.dropInlineIfError(PrepareInlineable.scala:225)
	at dotty.tools.dotc.typer.Namer.typedAheadRhs$2(Namer.scala:1544)
	at dotty.tools.dotc.typer.Namer.rhsType$1(Namer.scala:1552)
	at dotty.tools.dotc.typer.Namer.cookedRhsType$1(Namer.scala:1579)
	at dotty.tools.dotc.typer.Namer.lhsType$1(Namer.scala:1580)
	at dotty.tools.dotc.typer.Namer.inferredType$1(Namer.scala:1591)
	at dotty.tools.dotc.typer.Namer.valOrDefDefSig(Namer.scala:1600)
	at dotty.tools.dotc.typer.Namer.defDefSig(Namer.scala:1683)
	at dotty.tools.dotc.typer.Namer$Completer.typeSig(Namer.scala:703)
	at dotty.tools.dotc.typer.Namer$Completer.completeInCreationContext(Namer.scala:826)
	at dotty.tools.dotc.typer.Namer$Completer.complete(Namer.scala:727)
	at dotty.tools.dotc.core.SymDenotations$SymDenotation.completeFrom(SymDenotations.scala:167)
	at dotty.tools.dotc.core.Denotations$Denotation.completeInfo$1(Denotations.scala:188)
	at dotty.tools.dotc.core.Denotations$Denotation.info(Denotations.scala:190)
	at dotty.tools.dotc.core.SymDenotations$SymDenotation.ensureCompleted(SymDenotations.scala:369)
	at dotty.tools.dotc.typer.Typer.retrieveSym(Typer.scala:2627)
	at dotty.tools.dotc.typer.Typer.typedNamed$1(Typer.scala:2652)
	at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2747)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2813)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2817)
	at dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:2839)
	at dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:2889)
	at dotty.tools.dotc.typer.Typer.typedBlockStats(Typer.scala:1020)
	at dotty.tools.dotc.typer.Typer.typedBlock(Typer.scala:1024)
	at dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:2693)
	at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2748)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2813)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2817)
	at dotty.tools.dotc.typer.Typer.typedFunctionValue(Typer.scala:1382)
	at dotty.tools.dotc.typer.Typer.typedFunction(Typer.scala:1147)
	at dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:2695)
	at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2748)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2813)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2817)
	at dotty.tools.dotc.typer.Typer.adaptNoArgsUnappliedMethod$2(Typer.scala:3445)
	at dotty.tools.dotc.typer.Typer.adaptNoArgs$1(Typer.scala:3608)
	at dotty.tools.dotc.typer.Typer.adapt1(Typer.scala:3801)
	at dotty.tools.dotc.typer.Typer.adapt(Typer.scala:3153)
	at dotty.tools.dotc.typer.Typer.readapt$1(Typer.scala:3164)
	at dotty.tools.dotc.typer.Typer.adapt1(Typer.scala:3788)
	at dotty.tools.dotc.typer.Typer.adapt(Typer.scala:3153)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2813)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2817)
	at dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:2866)
	at dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:2889)
	at dotty.tools.dotc.typer.Typer.typedClassDef(Typer.scala:2344)
	at dotty.tools.dotc.typer.Typer.typedTypeOrClassDef$2(Typer.scala:2673)
	at dotty.tools.dotc.typer.Typer.typedNamed$1(Typer.scala:2677)
	at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2747)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2813)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2817)
	at dotty.tools.dotc.typer.Typer.traverse$1(Typer.scala:2839)
	at dotty.tools.dotc.typer.Typer.typedStats(Typer.scala:2889)
	at dotty.tools.dotc.typer.Typer.typedPackageDef(Typer.scala:2467)
	at dotty.tools.dotc.typer.Typer.typedUnnamed$1(Typer.scala:2718)
	at dotty.tools.dotc.typer.Typer.typedUnadapted(Typer.scala:2748)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2813)
	at dotty.tools.dotc.typer.Typer.typed(Typer.scala:2817)
	at dotty.tools.dotc.typer.Typer.typedExpr(Typer.scala:2933)
	at dotty.tools.dotc.typer.FrontEnd.liftedTree1$1(FrontEnd.scala:79)
	at dotty.tools.dotc.typer.FrontEnd.typeCheck$$anonfun$1(FrontEnd.scala:84)
	at dotty.tools.dotc.typer.FrontEnd.monitor(FrontEnd.scala:43)
	at dotty.tools.dotc.typer.FrontEnd.typeCheck(FrontEnd.scala:85)
	at dotty.tools.dotc.typer.FrontEnd.runOn$$anonfun$3(FrontEnd.scala:120)
	at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
	at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
	at scala.collection.immutable.List.foreach(List.scala:333)
	at dotty.tools.dotc.typer.FrontEnd.runOn(FrontEnd.scala:120)
	at dotty.tools.dotc.Run.runPhases$4$$anonfun$4(Run.scala:205)
	at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
	at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
	at scala.collection.ArrayOps$.foreach$extension(ArrayOps.scala:1323)
	at dotty.tools.dotc.Run.runPhases$5(Run.scala:216)
	at dotty.tools.dotc.Run.compileUnits$$anonfun$1(Run.scala:224)
	at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)
	at dotty.tools.dotc.util.Stats$.maybeMonitored(Stats.scala:67)
	at dotty.tools.dotc.Run.compileUnits(Run.scala:231)
	at dotty.tools.dotc.Run.compileSources(Run.scala:166)
	at dotty.tools.dotc.Run.compile(Run.scala:150)
	at dotty.tools.dotc.Driver.doCompile(Driver.scala:39)
	at dotty.tools.dotc.Driver.process(Driver.scala:199)
	at dotty.tools.dotc.Driver.process(Driver.scala:167)
	at dotty.tools.dotc.Driver.process(Driver.scala:179)
	at dotty.tools.dotc.Driver.main(Driver.scala:209)
	at dotty.tools.dotc.Main.main(Main.scala)
@som-snytt som-snytt mentioned this issue Oct 15, 2021
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@som-snytt
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Fixed per linked issue.

@smarter smarter closed this as completed Oct 15, 2021
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@smarter @som-snytt @OlivierBlanvillain @chengniansun