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Scaladoc throws next on empty iterator #6715

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scabug opened this issue Nov 26, 2012 · 8 comments
Closed

Scaladoc throws next on empty iterator #6715

scabug opened this issue Nov 26, 2012 · 8 comments
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@scabug
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@scabug scabug commented Nov 26, 2012

I'm getting this stack trace:

java.util.NoSuchElementException: next on empty iterator
at scala.collection.Iterator$$anon$2.next(Iterator.scala:39)
at scala.collection.Iterator$$anon$2.next(Iterator.scala:37)
at scala.collection.IndexedSeqLike$Elements.next(IndexedSeqLike.scala:64)
at scala.collection.IterableLike$class.head(IterableLike.scala:91)
at scala.collection.immutable.StringOps.scala$collection$IndexedSeqOptimized$$super$head(StringOps.scala:31)
at scala.collection.IndexedSeqOptimized$class.head(IndexedSeqOptimized.scala:120)
at scala.collection.immutable.StringOps.head(StringOps.scala:31)
at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1$result$2$.addMember(IndexModelFactory.scala:27)
at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1$$anonfun$scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1$2.apply(IndexModelFactory.scala:48)
at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1$$anonfun$scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1$2.apply(IndexModelFactory.scala:42)
at scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:773)
at scala.collection.immutable.List.foreach(List.scala:309)
at scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:772)
at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1.scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1(IndexModelFactory.scala:42)
at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1$$anonfun$scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1$2.apply(IndexModelFactory.scala:46)
at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1$$anonfun$scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1$2.apply(IndexModelFactory.scala:42)
at scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:773)
at scala.collection.immutable.List.foreach(List.scala:309)
at scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:772)
at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1.scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1(IndexModelFactory.scala:42)
at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1$$anonfun$scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1$2.apply(IndexModelFactory.scala:46)
at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1$$anonfun$scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1$2.apply(IndexModelFactory.scala:42)
at scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:773)
at scala.collection.immutable.List.foreach(List.scala:309)
at scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:772)
at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1.scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1(IndexModelFactory.scala:42)
at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1$$anonfun$scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1$2.apply(IndexModelFactory.scala:46)
at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1$$anonfun$scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1$2.apply(IndexModelFactory.scala:42)
at scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:773)
at scala.collection.immutable.List.foreach(List.scala:309)
at scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:772)
at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1.scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1(IndexModelFactory.scala:42)
at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1.firstLetterIndex$lzycompute(IndexModelFactory.scala:52)
at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1.firstLetterIndex(IndexModelFactory.scala:16)
at scala.tools.nsc.doc.html.HtmlFactory.generate(HtmlFactory.scala:131)
at scala.tools.nsc.doc.html.Doclet.generateImpl(Doclet.scala:16)
at scala.tools.nsc.doc.doclet.Generator.generate(Generator.scala:24)
at scala.tools.nsc.doc.DocFactory.generate$1(DocFactory.scala:134)
at scala.tools.nsc.doc.DocFactory.document(DocFactory.scala:137)
at xsbt.Runner.run(ScaladocInterface.scala:30)
at xsbt.ScaladocInterface.run(ScaladocInterface.scala:11)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at sbt.compiler.AnalyzingCompiler.call(AnalyzingCompiler.scala:73)
at sbt.compiler.AnalyzingCompiler.doc(AnalyzingCompiler.scala:54)
at sbt.compiler.AnalyzingCompiler.doc(AnalyzingCompiler.scala:50)
at sbt.Scaladoc$$anonfun$apply$3.apply(Doc.scala:62)
at sbt.Scaladoc$$anonfun$apply$3.apply(Doc.scala:62)
at sbt.Doc$class.generate(Doc.scala:36)
at sbt.Scaladoc.generate(Doc.scala:58)
at sbt.Scaladoc.apply(Doc.scala:62)
at sbt.Doc$$anonfun$1$$anonfun$apply$1.apply(Doc.scala:50)
at sbt.Doc$$anonfun$1$$anonfun$apply$1.apply(Doc.scala:48)
at sbt.Tracked$$anonfun$outputChanged$1.apply(Tracked.scala:57)
at sbt.Tracked$$anonfun$outputChanged$1.apply(Tracked.scala:52)
at sbt.Doc$class.cached(Doc.scala:55)
at sbt.Scaladoc.cached(Doc.scala:58)
at sbt.Defaults$$anonfun$docTaskSettings$1.apply(Defaults.scala:546)
at sbt.Defaults$$anonfun$docTaskSettings$1.apply(Defaults.scala:540)
at sbt.Scoped$$anonfun$hf5$1.apply(Structure.scala:581)
at sbt.Scoped$$anonfun$hf5$1.apply(Structure.scala:581)
at scala.Function1$$anonfun$compose$1.apply(Function1.scala:49)
at sbt.Scoped$Reduced$$anonfun$combine$1$$anonfun$apply$12.apply(Structure.scala:311)
at sbt.Scoped$Reduced$$anonfun$combine$1$$anonfun$apply$12.apply(Structure.scala:311)
at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:41)
at sbt.std.Transform$$anon$5.work(System.scala:71)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:232)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:232)
at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:18)
at sbt.Execute.work(Execute.scala:238)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:232)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:232)
at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159)
at sbt.CompletionService$$anon$2.call(CompletionService.scala:30)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)

@scabug
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@scabug scabug commented Nov 26, 2012

Imported From: https://issues.scala-lang.org/browse/SI-6715?orig=1
Reporter: Naftoli Gugenheim (naftoligug)
Affected Versions: 2.10.0-RC2, 2.10.0

@scabug
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@scabug scabug commented Jan 8, 2013

Naftoli Gugenheim (naftoligug) said:
Is there any workaround?

@scabug
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@scabug scabug commented Jan 8, 2013

@VladUreche said:
Hi, sorry for the delay in answering, I missed this bug completely. It seems you bumped into an entity without a name, which is very strange. Can you please post a minimization? It might help me find a workaround, at least to get things working with 2.10.0.

@scabug
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@scabug scabug commented Jan 9, 2013

Naftoli Gugenheim (naftoligug) said:
Turns out I had a def named $$.

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@scabug scabug commented Jan 10, 2013

@VladUreche said:
Good to know the indexer crashes on that. Thanks for investigating it!

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@scabug scabug commented Jan 29, 2013

@retronym said:
Deferring, we should fix this, but it it can wait.

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@scabug scabug commented Mar 19, 2013

@scabug scabug closed this May 1, 2013
@scabug
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@scabug scabug commented Aug 2, 2016

Michael Ahlers (michaelahlers) said:
I've encountered a similar issue, and this is the only ticket I found related to the problem.

Partial output (truncated and anonymized) output from last compile:doc:

[info] Main Scala API documentation to /Users/michaelahlers/Projects/my-project/target/scala-2.11/api...
[debug] Getting org.scala-sbt:compiler-interface:0.13.11:component from component compiler for Scala 2.11.8
[debug] Calling Scaladoc with arguments:
[debug]         -feature
[debug]         -unchecked
[debug]         -deprecation
[debug]         -target:jvm-1.8
[debug]         -Xfatal-warnings
[debug]         -Xmax-classfile-name
[debug]         150
[debug]         -doc-external-doc:/Users/michaelahlers/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.11.8.jar#http://www.scala-lang.org/api/2.11.8/,/Users/michaelahlers/.ivy2/cache/com.typesafe.play/play-json_2.11/jars/play-json_2.11-2.5.4.jar#http://playframework.com/documentation/2.5.x/api/scala/index.html,/Users/michaelahlers/.ivy2/cache/joda-time/joda-time/jars/joda-time-2.9.4.jar#http://www.joda.org/joda-time/apidocs/,/Users/michaelahlers/.ivy2/cache/org.scala-lang/scala-reflect/jars/scala-reflect-2.11.8.jar#http://www.scala-lang.org/api/2.11.8/,/Users/michaelahlers/.ivy2/cache/com.typesafe.play/play-iteratees_2.11/jars/play-iteratees_2.11-2.5.4.jar#http://playframework.com/documentation/2.5.x/api/scala/index.html
[debug]         -d
[debug]         /Users/michaelahlers/Projects/my-project/target/scala-2.11/api
[debug]         -bootclasspath
[debug]         /Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/sunrsasign.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk/Contents/Home/jre/classes:/Users/michaelahlers/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.11.8.jar
java.util.NoSuchElementException: next on empty iterator
        at scala.collection.Iterator$$anon$2.next(Iterator.scala:39)
        at scala.collection.Iterator$$anon$2.next(Iterator.scala:37)
        at scala.collection.IndexedSeqLike$Elements.next(IndexedSeqLike.scala:63)
        at scala.collection.IterableLike$class.head(IterableLike.scala:107)
        at scala.collection.immutable.StringOps.scala$collection$IndexedSeqOptimized$$super$head(StringOps.scala:29)
        at scala.collection.IndexedSeqOptimized$class.head(IndexedSeqOptimized.scala:126)
        at scala.collection.immutable.StringOps.head(StringOps.scala:29)
        at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1$result$2$.addMember(IndexModelFactory.scala:28)
        at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1$$anonfun$scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1$2.apply(IndexModelFactory.scala:48)
        at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1$$anonfun$scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1$2.apply(IndexModelFactory.scala:45)
        at scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:733)
        at scala.collection.immutable.List.foreach(List.scala:381)
        at scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:732)
        at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1.scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1(IndexModelFactory.scala:45)
        at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1$$anonfun$scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1$2.apply(IndexModelFactory.scala:49)
        at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1$$anonfun$scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1$2.apply(IndexModelFactory.scala:45)
        at scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:733)
        at scala.collection.immutable.List.foreach(List.scala:381)
        at scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:732)
        at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1.scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1(IndexModelFactory.scala:45)
        at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1$$anonfun$scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1$2.apply(IndexModelFactory.scala:49)
        at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1$$anonfun$scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1$2.apply(IndexModelFactory.scala:45)
        at scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:733)
        at scala.collection.immutable.List.foreach(List.scala:381)
        at scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:732)
        at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1.scala$tools$nsc$doc$model$IndexModelFactory$$anon$$gather$1(IndexModelFactory.scala:45)
        at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1.x$3$lzycompute(IndexModelFactory.scala:55)
        at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1.x$3(IndexModelFactory.scala:17)
        at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1.firstLetterIndex$lzycompute(IndexModelFactory.scala:17)
        at scala.tools.nsc.doc.model.IndexModelFactory$$anon$1.firstLetterIndex(IndexModelFactory.scala:17)
        at scala.tools.nsc.doc.html.page.Index$$anonfun$letters$1.apply(Index.scala:54)
        at scala.tools.nsc.doc.html.page.Index$$anonfun$letters$1.apply(Index.scala:51)
        at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
        at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
        at scala.collection.Iterator$class.foreach(Iterator.scala:893)
        at scala.collection.AbstractIterator.foreach(Iterator.scala:1336)
        at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
        at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
        at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
        at scala.collection.AbstractTraversable.map(Traversable.scala:104)
        at scala.tools.nsc.doc.html.page.Index.letters(Index.scala:50)
        at scala.tools.nsc.doc.html.page.Index.browser(Index.scala:74)
        at scala.tools.nsc.doc.html.page.Index.<init>(Index.scala:43)
        at scala.tools.nsc.doc.html.HtmlFactory.generate(HtmlFactory.scala:124)
        at scala.tools.nsc.doc.html.Doclet.generateImpl(Doclet.scala:16)
        at scala.tools.nsc.doc.doclet.Generator.generate(Generator.scala:24)
        at scala.tools.nsc.doc.DocFactory.generate$1(DocFactory.scala:121)
        at scala.tools.nsc.doc.DocFactory.document(DocFactory.scala:124)
        at xsbt.Runner.run(ScaladocInterface.scala:26)
        at xsbt.ScaladocInterface.run(ScaladocInterface.scala:10)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at sbt.compiler.AnalyzingCompiler.call(AnalyzingCompiler.scala:101)
        at sbt.compiler.AnalyzingCompiler.doc(AnalyzingCompiler.scala:67)
        at sbt.compiler.AnalyzingCompiler.doc(AnalyzingCompiler.scala:62)
        at sbt.Doc$$anonfun$scaladoc$1.apply(Doc.scala:23)
        at sbt.Doc$$anonfun$scaladoc$1.apply(Doc.scala:23)
        at sbt.RawCompileLike$$anonfun$prepare$1.apply(RawCompileLike.scala:64)
        at sbt.RawCompileLike$$anonfun$prepare$1.apply(RawCompileLike.scala:56)
        at sbt.RawCompileLike$$anonfun$cached$1$$anonfun$2$$anonfun$apply$1.apply(RawCompileLike.scala:49)
        at sbt.RawCompileLike$$anonfun$cached$1$$anonfun$2$$anonfun$apply$1.apply(RawCompileLike.scala:47)
        at sbt.Tracked$$anonfun$outputChanged$1.apply(Tracked.scala:84)
        at sbt.Tracked$$anonfun$outputChanged$1.apply(Tracked.scala:79)
        at sbt.RawCompileLike$$anonfun$cached$1.apply(RawCompileLike.scala:54)
        at sbt.RawCompileLike$$anonfun$cached$1.apply(RawCompileLike.scala:39)
        at sbt.Defaults$$anonfun$docTaskSettings$3.apply(Defaults.scala:803)
        at sbt.Defaults$$anonfun$docTaskSettings$3.apply(Defaults.scala:781)
        at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
        at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:40)
        at sbt.std.Transform$$anon$4.work(System.scala:63)
        at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)
        at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)
        at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
        at sbt.Execute.work(Execute.scala:237)
        at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)
        at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)
        at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159)
        at sbt.CompletionService$$anon$2.call(CompletionService.scala:28)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)

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