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regression in error quality with missing symbols #5148

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scabug opened this issue Nov 4, 2011 · 3 comments
Closed

regression in error quality with missing symbols #5148

scabug opened this issue Nov 4, 2011 · 3 comments
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@scabug
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scabug commented Nov 4, 2011

Trying to compile this file fails kind of sensibly in 2.9.1:

package scala.tools.nsc
package interpreter

class IMain extends Imports
error: class file needed by Imports is missing.
reference value global of scala.tools.nsc.interpreter.IMain refers to nonexisting symbol.
one error found

In current trunk it explodes instead:

scalac3 -d /tmp ./IMain.scala 
unhandled exception while transforming IMain.scala
error: scala.reflect.internal.MissingRequirementError
[...]
	at scala.reflect.internal.MissingRequirementError$.signal(MissingRequirementError.scala:16)
	at scala.reflect.internal.MissingRequirementError$.notFound(MissingRequirementError.scala:17)
	at scala.reflect.internal.pickling.UnPickler$Scan$$anonfun$errorMissingRequirement$1.apply(UnPickler.scala:822)
	at scala.reflect.internal.pickling.UnPickler$Scan$$anonfun$errorMissingRequirement$1.apply(UnPickler.scala:822)
	at scala.reflect.internal.Symbols$Symbol.orElse(Symbols.scala:1773)

This hits me every day, plus or minus.

@scabug
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scabug commented Nov 4, 2011

Imported From: https://issues.scala-lang.org/browse/SI-5148?orig=1
Reporter: @paulp

@scabug
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scabug commented Jun 26, 2012

@hubertp said:
Currently it fails with

error: 
     while compiling: t5148.scala
        during phase: specialize
     library version: version 2.10.0-20120626-010055-5a7bbfe035
    compiler version: version 2.10.0-20120626-010055-5a7bbfe035
  reconstructed args: -d /tmp

  last tree to typer: Literal(Constant(()))
              symbol: null
   symbol definition: null
                 tpe: Unit
       symbol owners: 
      context owners: package interpreter

== Enclosing template or block ==

PackageDef(
  "interpreter" // final package interpreter in package nsc, tree.tpe=scala.tools.nsc.interpreter.type
  ClassDef( // class IMain extends Imports in package interpreter
    0
    "IMain"
    []
    Template( // val <local IMain>: <notype> in class IMain, tree.tpe=scala.tools.nsc.interpreter.IMain
      "java.lang.Object", "scala.tools.nsc.interpreter.Imports" // parents
      ValDef(
        private
        "_"
        <tpt>
        <empty>
      )
      DefDef( // def <init>(): scala.tools.nsc.interpreter.IMain in class IMain
        <method>
        "<init>"
        []
        List(Nil)
        <tpt> // tree.tpe=scala.tools.nsc.interpreter.IMain
        Block( // tree.tpe=Unit
          Apply( // def <init>(): Object in class Object, tree.tpe=Object
            IMain.super."<init>" // def <init>(): Object in class Object, tree.tpe=()Object
            Nil
          )
          ()
        )
      )
    )
  )
)

== Expanded type of tree ==

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

uncaught exception during compilation: scala.reflect.internal.Types$TypeError
error: scala.reflect.internal.Types$TypeError: bad reference while unpickling /home/hubert/tmp/repos/scala-dev/build/pack/lib/scala-compiler.jar(scala/tools/nsc/interpreter/Imports.class): term memberHandlers not found in scala.tools.nsc.interpreter.IMain
	at scala.reflect.internal.pickling.UnPickler$Scan.toTypeError(UnPickler.scala:836)
	at scala.reflect.internal.pickling.UnPickler$Scan$LazyTypeRef.complete(UnPickler.scala:849)
	at scala.reflect.internal.pickling.UnPickler$Scan$LazyTypeRef.load(UnPickler.scala:851)
	at scala.reflect.internal.Symbols$Symbol$$anonfun$typeParams$1.apply$mcV$sp(Symbols.scala:1420)
	at scala.reflect.internal.Symbols$Symbol$$anonfun$typeParams$1.apply(Symbols.scala:1420)
	at scala.reflect.internal.Symbols$Symbol$$anonfun$typeParams$1.apply(Symbols.scala:1420)
	at scala.reflect.internal.SymbolTable.atPhase(SymbolTable.scala:195)
	at scala.reflect.internal.Symbols$Symbol.typeParams(Symbols.scala:1420)
	at scala.tools.nsc.transform.SpecializeTypes$$anonfun$scala$tools$nsc$transform$SpecializeTypes$$normalizeMember$1.apply$mcZ$sp(SpecializeTypes.scala:795)
	at scala.tools.nsc.transform.SpecializeTypes$$anonfun$scala$tools$nsc$transform$SpecializeTypes$$normalizeMember$1.apply(SpecializeTypes.scala:795)
	at scala.tools.nsc.transform.SpecializeTypes$$anonfun$scala$tools$nsc$transform$SpecializeTypes$$normalizeMember$1.apply(SpecializeTypes.scala:795)
	at scala.reflect.internal.SymbolTable.atPhase(SymbolTable.scala:195)
	at scala.reflect.internal.SymbolTable.beforePhase(SymbolTable.scala:203)
	at scala.tools.nsc.Global.beforeTyper(Global.scala:1118)
	at scala.tools.nsc.transform.SpecializeTypes.scala$tools$nsc$transform$SpecializeTypes$$normalizeMember(SpecializeTypes.scala:795)
	at scala.tools.nsc.transform.SpecializeTypes$$anonfun$29.apply(SpecializeTypes.scala:748)
	at scala.tools.nsc.transform.SpecializeTypes$$anonfun$29.apply(SpecializeTypes.scala:746)
	at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:245)
	at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:245)
	at scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.scala:59)
	at scala.collection.immutable.List.foreach(List.scala:77)
	at scala.collection.TraversableLike$class.flatMap(TraversableLike.scala:245)
	at scala.collection.AbstractTraversable.flatMap(Traversable.scala:105)
	at scala.tools.nsc.transform.SpecializeTypes.specializeClass(SpecializeTypes.scala:746)
	at scala.tools.nsc.transform.SpecializeTypes.transformInfo(SpecializeTypes.scala:1151)
	at scala.tools.nsc.transform.InfoTransform$Phase$$anon$1.transform(InfoTransform.scala:38)
	at scala.reflect.internal.Symbols$Symbol.rawInfo(Symbols.scala:1295)
	at scala.reflect.internal.Symbols$Symbol.info(Symbols.scala:1223)
	at scala.tools.nsc.transform.SpecializeTypes$$anonfun$transformInfo$1$$anonfun$apply$37.apply(SpecializeTypes.scala:1143)
	at scala.tools.nsc.transform.SpecializeTypes$$anonfun$transformInfo$1$$anonfun$apply$37.apply(SpecializeTypes.scala:1143)
	at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:239)
	at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:239)
	at scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.scala:59)
	at scala.collection.immutable.List.foreach(List.scala:77)
	at scala.collection.TraversableLike$class.map(TraversableLike.scala:239)
	at scala.collection.AbstractTraversable.map(Traversable.scala:105)
	at scala.tools.nsc.transform.SpecializeTypes$$anonfun$transformInfo$1.apply(SpecializeTypes.scala:1143)
	at scala.tools.nsc.transform.SpecializeTypes$$anonfun$transformInfo$1.apply(SpecializeTypes.scala:1143)
	at scala.reflect.internal.SymbolTable.atPhase(SymbolTable.scala:195)
	at scala.reflect.internal.SymbolTable.afterPhase(SymbolTable.scala:204)
	at scala.tools.nsc.Global.afterSpecialize(Global.scala:1107)
	at scala.tools.nsc.transform.SpecializeTypes.transformInfo(SpecializeTypes.scala:1143)
	at scala.tools.nsc.transform.InfoTransform$Phase$$anon$1.transform(InfoTransform.scala:38)
	at scala.reflect.internal.Symbols$Symbol.rawInfo(Symbols.scala:1295)
	at scala.reflect.internal.Symbols$Symbol.info(Symbols.scala:1223)
	at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$implSpecClasses$1.apply(SpecializeTypes.scala:1755)
	at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$implSpecClasses$1.apply(SpecializeTypes.scala:1752)
	at scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.scala:59)
	at scala.collection.immutable.List.foreach(List.scala:77)
	at scala.tools.nsc.transform.SpecializeTypes$$anon$2.implSpecClasses(SpecializeTypes.scala:1752)
	at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$17.apply(SpecializeTypes.scala:1486)
	at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$17.apply(SpecializeTypes.scala:1485)
	at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:674)
	at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:38)
	at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1485)
	at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1311)
	at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$2.apply(Trees.scala:667)
	at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$2.apply(Trees.scala:665)
	at scala.collection.immutable.List.loop$1(List.scala:163)
	at scala.collection.immutable.List.mapConserve(List.scala:179)
	at scala.reflect.api.Trees$Transformer.transformStats(Trees.scala:665)
	at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$17.apply(SpecializeTypes.scala:1487)
	at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$17.apply(SpecializeTypes.scala:1485)
	at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:674)
	at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:38)
	at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1485)
	at scala.tools.nsc.transform.SpecializeTypes$SpecializationTransformer$$anonfun$48.apply(SpecializeTypes.scala:1845)
	at scala.tools.nsc.transform.SpecializeTypes$SpecializationTransformer$$anonfun$48.apply(SpecializeTypes.scala:1845)
	at scala.reflect.internal.SymbolTable.atPhase(SymbolTable.scala:195)
	at scala.reflect.internal.SymbolTable.afterPhase(SymbolTable.scala:204)
	at scala.tools.nsc.Global.afterSpecialize(Global.scala:1107)
	at scala.tools.nsc.transform.SpecializeTypes$SpecializationTransformer.transform(SpecializeTypes.scala:1845)
	at scala.tools.nsc.transform.SpecializeTypes$SpecializationTransformer.transform(SpecializeTypes.scala:1841)
	at scala.tools.nsc.ast.Trees$Transformer.transformUnit(Trees.scala:229)
	at scala.tools.nsc.transform.Transform$Phase.apply(Transform.scala:30)

@scabug
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scabug commented Jun 27, 2012

@hubertp said (edited by @lrytz on Sep 30, 2016 8:48:18 AM UTC):
Closed by scala/scala#779

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