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Compiler crashes when evaluating XML element followed by "()" #7185

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scabug opened this issue Feb 26, 2013 · 2 comments
Closed

Compiler crashes when evaluating XML element followed by "()" #7185

scabug opened this issue Feb 26, 2013 · 2 comments
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@retronym
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has PR
Milestone
2.10.2-RC1

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@scabug
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scabug commented Feb 26, 2013

When Scala compiler evaluates XML element followed by "()" (without quotes), it crashes with NullPointerException.

It will be more helpful to generate a compilation error.

Welcome to Scala version 2.10.0 (OpenJDK 64-Bit Server VM, Java 1.7.0_09-icedtea).
Type in expressions to have them evaluated.
Type :help for more information.

scala> <e></e>()
<console>:8: error: overloaded method value apply with alternatives:
  (f: scala.xml.Node => Boolean)scala.xml.NodeSeq <and>
  (i: Int)scala.xml.Node
 cannot be applied to ()
       <e></e>()
        ^
error:
     while compiling: <console>
        during phase: typer
     library version: version 2.10.0
    compiler version: version 2.10.0
  reconstructed args:

  last tree to typer: Apply(constructor Elem)
              symbol: constructor Elem in class Elem (flags: <method>)
   symbol definition: def <init>(prefix: String,label: String,attributes1: scala.xml.MetaData,scope: scala.xml.NamespaceBinding,minimizeEmpty: Boolean,child: scala.xml.Node*): scala.xml.Elem
                 tpe: scala.xml.Elem
       symbol owners: constructor Elem -> class Elem -> package xml
      context owners: value res0 -> object $iw -> object $iw -> object $read -> package $line3

...

TypeRef(TypeSymbol(class Elem extends Node with Serializable))

uncaught exception during compilation: java.lang.NullPointerException
java.lang.NullPointerException
        at scala.reflect.internal.TreeInfo.isExprSafeToInline(TreeInfo.scala:98)
        at scala.reflect.internal.TreeInfo.isExprSafeToInline(TreeInfo.scala:102)
        at scala.tools.nsc.typechecker.Typers$Typer.typedBlock(Typers.scala:2343)
        at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5387)
        at scala.tools.nsc.typechecker.Typers$Typer.typedApply$1(Typers.scala:4507)
        at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5381)
        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.typed(Typers.scala:5526)
        at scala.tools.nsc.typechecker.Typers$Typer.computeType(Typers.scala:5621)
        at scala.tools.nsc.typechecker.Namers$Namer.assignTypeToTree(Namers.scala:813)
        at scala.tools.nsc.typechecker.Namers$Namer.getSig$1(Namers.scala:1319)
        at scala.tools.nsc.typechecker.Namers$Namer.typeSig(Namers.scala:1347)
        at scala.tools.nsc.typechecker.Namers$Namer$$anonfun$monoTypeCompleter$1$$anonfun$apply$1.apply$mcV$sp(Namers.scala:709)
        at scala.tools.nsc.typechecker.Namers$Namer$$anonfun$monoTypeCompleter$1$$anonfun$apply$1.apply(Namers.scala:708)
        at scala.tools.nsc.typechecker.Namers$Namer$$anonfun$monoTypeCompleter$1$$anonfun$apply$1.apply(Namers.scala:708)
        at scala.tools.nsc.typechecker.Namers$Namer.scala$tools$nsc$typechecker$Namers$Namer$$logAndValidate(Namers.scala:1385)
        at scala.tools.nsc.typechecker.Namers$Namer$$anonfun$monoTypeCompleter$1.apply(Namers.scala:708)
        at scala.tools.nsc.typechecker.Namers$Namer$$anonfun$monoTypeCompleter$1.apply(Namers.scala:707)
        at scala.tools.nsc.typechecker.Namers$$anon$1.completeImpl(Namers.scala:1496)
        at scala.tools.nsc.typechecker.Namers$LockingTypeCompleter$class.complete(Namers.scala:1504)
        at scala.tools.nsc.typechecker.Namers$$anon$1.complete(Namers.scala:1494)
        at scala.reflect.internal.Symbols$Symbol.info(Symbols.scala:1217)
        at scala.reflect.internal.Symbols$Symbol.initialize(Symbols.scala:1352)
        at scala.tools.nsc.typechecker.MethodSynthesis$MethodSynth$class.addDerivedTrees(MethodSynthesis.scala:224)
        at scala.tools.nsc.typechecker.Namers$Namer.addDerivedTrees(Namers.scala:55)
        at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$29.apply(Typers.scala:1860)
        at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$29.apply(Typers.scala:1860)
        at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$rewrappingWrapperTrees$1.apply(Typers.scala:1798)
        at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$rewrappingWrapperTrees$1.apply(Typers.scala:1795)
        at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:251)
        at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:251)
        at scala.collection.immutable.List.foreach(List.scala:309)
        at scala.collection.TraversableLike$class.flatMap(TraversableLike.scala:251)
        at scala.collection.AbstractTraversable.flatMap(Traversable.scala:105)
        at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1860)
        at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1769)
        at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5401)
        at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5458)
        at scala.tools.nsc.interpreter.ReplGlobal$$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.typedModuleDef(Typers.scala:1769)
        at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5401)
        at scala.tools.nsc.typechecker.Typers$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$$anonfun$55.apply(Typers.scala:2870)
        at scala.collection.immutable.List.loop$1(List.scala:164)
        at scala.collection.immutable.List.mapConserve(List.scala:180)
        at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:2870)
        at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1862)
        at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1769)
        at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5401)
        at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5458)
        at scala.tools.nsc.interpreter.ReplGlobal$$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.typedPackageDef$1(Typers.scala:5127)
        at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5404)
        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.typed(Typers.scala:5509)
        at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3.apply(Analyzer.scala:98)
        at scala.tools.nsc.Global$GlobalPhase.applyPhase(Global.scala:461)
        at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3$$anonfun$run$1.apply(Analyzer.scala:90)
        at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3$$anonfun$run$1.apply(Analyzer.scala:90)
        at scala.collection.Iterator$class.foreach(Iterator.scala:727)
        at scala.collection.AbstractIterator.foreach(Iterator.scala:1156)
        at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3.run(Analyzer.scala:90)
        at scala.tools.nsc.Global$Run.compileUnitsInternal(Global.scala:1574)
        at scala.tools.nsc.Global$Run.compileUnits(Global.scala:1548)
        at scala.tools.nsc.Global$Run.compileSources(Global.scala:1544)
        at scala.tools.nsc.interpreter.IMain.compileSourcesKeepingRun(IMain.scala:425)
        at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.compileAndSaveRun(IMain.scala:798)
        at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.compile(IMain.scala:758)
        at scala.tools.nsc.interpreter.IMain$Request.compile$lzycompute(IMain.scala:933)
        at scala.tools.nsc.interpreter.IMain$Request.compile(IMain.scala:928)
        at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:600)
        at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:565)
        at scala.tools.nsc.interpreter.ILoop.reallyInterpret$1(ILoop.scala:745)
        at scala.tools.nsc.interpreter.ILoop.interpretStartingWith(ILoop.scala:790)
        at scala.tools.nsc.interpreter.ILoop.command(ILoop.scala:702)
        at scala.tools.nsc.interpreter.ILoop.processLine$1(ILoop.scala:566)
        at scala.tools.nsc.interpreter.ILoop.innerLoop$1(ILoop.scala:573)
        at scala.tools.nsc.interpreter.ILoop.loop(ILoop.scala:576)
        at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply$mcZ$sp(ILoop.scala:867)
        at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:822)
        at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:822)
        at scala.tools.nsc.util.ScalaClassLoader$.savingContextLoader(ScalaClassLoader.scala:135)
        at scala.tools.nsc.interpreter.ILoop.process(ILoop.scala:822)
        at scala.tools.nsc.MainGenericRunner.runTarget$1(MainGenericRunner.scala:83)
        at scala.tools.nsc.MainGenericRunner.process(MainGenericRunner.scala:96)
        at scala.tools.nsc.MainGenericRunner$.main(MainGenericRunner.scala:105)
        at scala.tools.nsc.MainGenericRunner.main(MainGenericRunner.scala)
@scabug
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scabug commented Feb 26, 2013

Imported From: https://issues.scala-lang.org/browse/SI-7185?orig=1
Reporter: Howard Guo (howard)
Affected Versions: 2.10.0
Attachments:

  • output.txt (created on Feb 26, 2013 10:42:23 AM UTC, 11417 bytes)

@scabug
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scabug commented Feb 26, 2013

@retronym said:
scala/scala#2175

@scabug scabug closed this as completed Mar 5, 2013
@scabug scabug added the has PR label Apr 7, 2017
@scabug scabug added this to the 2.10.2-RC1 milestone Apr 7, 2017
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