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crashing the scala compiler
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| object crash { | |
| class Bar[A] | |
| def bar[A](barOpt: Option[Bar[_ >: A]]): Bar[A] = new Bar | |
| def build[A](barOpt: Option[Bar[_ >: A]]): Bar[A] = | |
| // fix the crash by inserting "[A]" on the following line | |
| bar(barOpt) | |
| } |
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| [error] trying to do lub/glb of typevar ?A | |
| [error] while compiling: /Users/jsmscs/ws/crash1/src/main/scala/package.scala | |
| [error] during phase: typer | |
| [error] library version: version 2.11.7 | |
| [error] compiler version: version 2.11.7 | |
| [error] reconstructed args: -Xfuture -Yno-adapted-args -deprecation -feature -language:implicitConversions -language:higherKinds -language:existentials -bootclasspath /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/jsmscs/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.11.7.jar -Ywarn-numeric-widen -unchecked -classpath /Users/jsmscs/ws/crash1/target/scala-2.11/classes:/Users/jsmscs/.ivy2/cache/org.scoverage/scalac-scoverage-runtime_2.11/jars/scalac-scoverage-runtime_2.11-1.1.1.jar:/Users/jsmscs/.ivy2/cache/org.scoverage/scalac-scoverage-plugin_2.11/jars/scalac-scoverage-plugin_2.11-1.1.1.jar | |
| [error] | |
| [error] last tree to typer: Ident(barOpt) | |
| [error] tree position: line 11 of /Users/jsmscs/ws/crash1/src/main/scala/package.scala | |
| [error] tree tpe: Option[crash.Bar[_ >: A]] | |
| [error] symbol: value barOpt | |
| [error] symbol definition: barOpt: Option[crash.Bar[_ >: A]] (a TermSymbol) | |
| [error] symbol package: <empty> | |
| [error] symbol owners: value barOpt -> method build -> object crash | |
| [error] call site: method build in object crash in package <empty> | |
| [error] | |
| [error] == Source file context for tree position == | |
| [error] | |
| [error] 8 def build[A](barOpt: Option[Bar[_ >: A]]): Bar[A] = | |
| [error] 9 // fix the crash by inserting "[A]" on the following line | |
| [error] 10 bar(barOpt) | |
| [error] 11 | |
| [error] 12 } | |
| [trace] Stack trace suppressed: run last compile:compileIncremental for the full output. | |
| [error] (compile:compileIncremental) scala.reflect.internal.FatalError: | |
| [error] trying to do lub/glb of typevar ?A | |
| [error] while compiling: /Users/jsmscs/ws/crash1/src/main/scala/package.scala | |
| [error] during phase: typer | |
| [error] library version: version 2.11.7 | |
| [error] compiler version: version 2.11.7 | |
| [error] reconstructed args: -Xfuture -Yno-adapted-args -deprecation -feature -language:implicitConversions -language:higherKinds -language:existentials -bootclasspath /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/jsmscs/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.11.7.jar -Ywarn-numeric-widen -unchecked -classpath /Users/jsmscs/ws/crash1/target/scala-2.11/classes:/Users/jsmscs/.ivy2/cache/org.scoverage/scalac-scoverage-runtime_2.11/jars/scalac-scoverage-runtime_2.11-1.1.1.jar:/Users/jsmscs/.ivy2/cache/org.scoverage/scalac-scoverage-plugin_2.11/jars/scalac-scoverage-plugin_2.11-1.1.1.jar | |
| [error] | |
| [error] last tree to typer: Ident(barOpt) | |
| [error] tree position: line 11 of /Users/jsmscs/ws/crash1/src/main/scala/package.scala | |
| [error] tree tpe: Option[crash.Bar[_ >: A]] | |
| [error] symbol: value barOpt | |
| [error] symbol definition: barOpt: Option[crash.Bar[_ >: A]] (a TermSymbol) | |
| [error] symbol package: <empty> | |
| [error] symbol owners: value barOpt -> method build -> object crash | |
| [error] call site: method build in object crash in package <empty> | |
| [error] | |
| [error] == Source file context for tree position == | |
| [error] | |
| [error] 8 def build[A](barOpt: Option[Bar[_ >: A]]): Bar[A] = | |
| [error] 9 // fix the crash by inserting "[A]" on the following line | |
| [error] 10 bar(barOpt) | |
| [error] 11 | |
| [error] 12 } |
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| at scala.reflect.internal.Reporting$class.abort(Reporting.scala:59) | |
| at scala.reflect.internal.SymbolTable.abort(SymbolTable.scala:16) | |
| at scala.reflect.internal.tpe.GlbLubs$class.stripType$1(GlbLubs.scala:224) | |
| at scala.reflect.internal.tpe.GlbLubs$$anonfun$18.apply(GlbLubs.scala:227) | |
| at scala.reflect.internal.tpe.GlbLubs$$anonfun$18.apply(GlbLubs.scala:227) | |
| at scala.collection.immutable.List.loop$1(List.scala:173) | |
| at scala.collection.immutable.List.mapConserve(List.scala:189) | |
| at scala.reflect.internal.tpe.GlbLubs$class.stripExistentialsAndTypeVars(GlbLubs.scala:227) | |
| at scala.reflect.internal.tpe.GlbLubs$class.lub1$1(GlbLubs.scala:328) | |
| at scala.reflect.internal.tpe.GlbLubs$class.lub0$1(GlbLubs.scala:322) | |
| at scala.reflect.internal.tpe.GlbLubs$class.lub(GlbLubs.scala:419) | |
| at scala.reflect.internal.SymbolTable.lub(SymbolTable.scala:16) | |
| at scala.reflect.internal.tpe.GlbLubs$class.lub(GlbLubs.scala:279) | |
| at scala.reflect.internal.SymbolTable.lub(SymbolTable.scala:16) | |
| at scala.reflect.internal.tpe.TypeConstraints$class.solveOne$1(TypeConstraints.scala:248) | |
| at scala.reflect.internal.tpe.TypeConstraints$$anonfun$solve$1.apply(TypeConstraints.scala:260) | |
| at scala.reflect.internal.tpe.TypeConstraints$$anonfun$solve$1.apply(TypeConstraints.scala:260) | |
| at scala.reflect.internal.util.Collections$class.foreach3(Collections.scala:231) | |
| at scala.reflect.internal.SymbolTable.foreach3(SymbolTable.scala:16) | |
| at scala.reflect.internal.tpe.TypeConstraints$class.solve(TypeConstraints.scala:260) | |
| at scala.reflect.internal.SymbolTable.solve(SymbolTable.scala:16) | |
| at scala.reflect.internal.Types$ExistentialType.withTypeVars(Types.scala:2696) | |
| at scala.reflect.internal.tpe.TypeComparers$class.thirdTry$1(TypeComparers.scala:483) | |
| at scala.reflect.internal.tpe.TypeComparers$class.secondTry$1(TypeComparers.scala:450) | |
| at scala.reflect.internal.tpe.TypeComparers$class.firstTry$1(TypeComparers.scala:426) | |
| at scala.reflect.internal.tpe.TypeComparers$class.isSubType2(TypeComparers.scala:552) | |
| at scala.reflect.internal.tpe.TypeComparers$class.isSubType1(TypeComparers.scala:320) | |
| at scala.reflect.internal.tpe.TypeComparers$class.isSubType(TypeComparers.scala:278) | |
| at scala.reflect.internal.SymbolTable.isSubType(SymbolTable.scala:16) | |
| at scala.reflect.internal.tpe.TypeComparers$class.secondTry$1(TypeComparers.scala:445) | |
| at scala.reflect.internal.tpe.TypeComparers$class.firstTry$1(TypeComparers.scala:426) | |
| at scala.reflect.internal.tpe.TypeComparers$class.isSubType2(TypeComparers.scala:552) | |
| at scala.reflect.internal.tpe.TypeComparers$class.isSubType1(TypeComparers.scala:320) | |
| at scala.reflect.internal.tpe.TypeComparers$class.isSubType(TypeComparers.scala:278) | |
| at scala.reflect.internal.SymbolTable.isSubType(SymbolTable.scala:16) | |
| at scala.reflect.internal.Types$class.isSubArg$1(Types.scala:4117) | |
| at scala.reflect.internal.Types$$anonfun$isSubArgs$2.apply(Types.scala:4120) | |
| at scala.reflect.internal.Types$$anonfun$isSubArgs$2.apply(Types.scala:4120) | |
| at scala.reflect.internal.util.Collections$class.corresponds3(Collections.scala:24) | |
| at scala.reflect.internal.SymbolTable.corresponds3(SymbolTable.scala:16) | |
| at scala.reflect.internal.Types$class.isSubArgs(Types.scala:4120) | |
| at scala.reflect.internal.SymbolTable.isSubArgs(SymbolTable.scala:16) | |
| at scala.reflect.internal.tpe.TypeComparers$class.firstTry$1(TypeComparers.scala:402) | |
| at scala.reflect.internal.tpe.TypeComparers$class.isSubType2(TypeComparers.scala:552) | |
| at scala.reflect.internal.tpe.TypeComparers$class.isSubType1(TypeComparers.scala:320) | |
| at scala.reflect.internal.tpe.TypeComparers$class.isSubType(TypeComparers.scala:278) | |
| at scala.reflect.internal.SymbolTable.isSubType(SymbolTable.scala:16) | |
| at scala.reflect.internal.tpe.TypeComparers$class.isWeakSubType(TypeComparers.scala:575) | |
| at scala.reflect.internal.SymbolTable.isWeakSubType(SymbolTable.scala:16) | |
| at scala.reflect.internal.Types$Type.weak_$less$colon$less(Types.scala:825) | |
| at scala.tools.nsc.typechecker.Infer$Inferencer.scala$tools$nsc$typechecker$Infer$Inferencer$$isCompatible(Infer.scala:305) | |
| at scala.tools.nsc.typechecker.Infer$Inferencer$$anonfun$methTypeArgs$2.apply(Infer.scala:545) | |
| at scala.tools.nsc.typechecker.Infer$Inferencer$$anonfun$methTypeArgs$2.apply(Infer.scala:539) | |
| at scala.reflect.internal.util.Collections$class.map2(Collections.scala:79) | |
| at scala.reflect.internal.SymbolTable.map2(SymbolTable.scala:16) | |
| at scala.tools.nsc.typechecker.Infer$Inferencer.methTypeArgs(Infer.scala:539) | |
| at scala.tools.nsc.typechecker.Infer$Inferencer.inferMethodInstance(Infer.scala:992) | |
| at scala.tools.nsc.typechecker.Typers$Typer.handlePolymorphicCall$1(Typers.scala:3529) | |
| at scala.tools.nsc.typechecker.Typers$Typer.doTypedApply(Typers.scala:3534) | |
| at scala.tools.nsc.typechecker.Typers$Typer.normalTypedApply$1(Typers.scala:4545) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typedApply$1(Typers.scala:4579) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typedInAnyMode$1(Typers.scala:5342) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5359) | |
| at scala.tools.nsc.typechecker.Typers$Typer.runTyper$1(Typers.scala:5395) | |
| at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$typedInternal(Typers.scala:5422) | |
| at scala.tools.nsc.typechecker.Typers$Typer.body$2(Typers.scala:5369) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5373) | |
| at scala.tools.nsc.typechecker.Typers$Typer.transformedOrTyped(Typers.scala:5604) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typedDefDef(Typers.scala:2208) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typedMemberDef$1(Typers.scala:5307) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5358) | |
| at scala.tools.nsc.typechecker.Typers$Typer.runTyper$1(Typers.scala:5395) | |
| at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$typedInternal(Typers.scala:5422) | |
| at scala.tools.nsc.typechecker.Typers$Typer.body$2(Typers.scala:5369) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5373) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typedByValueExpr(Typers.scala:5451) | |
| at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$typedStat$1(Typers.scala:3047) | |
| at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$65.apply(Typers.scala:3151) | |
| at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$65.apply(Typers.scala:3151) | |
| at scala.collection.immutable.List.loop$1(List.scala:173) | |
| at scala.collection.immutable.List.mapConserve(List.scala:189) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:3151) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typedTemplate(Typers.scala:1921) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typedModuleDef(Typers.scala:1808) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typedMemberDef$1(Typers.scala:5309) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5358) | |
| at scala.tools.nsc.typechecker.Typers$Typer.runTyper$1(Typers.scala:5395) | |
| at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$typedInternal(Typers.scala:5422) | |
| at scala.tools.nsc.typechecker.Typers$Typer.body$2(Typers.scala:5369) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5373) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typedByValueExpr(Typers.scala:5451) | |
| at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$typedStat$1(Typers.scala:3047) | |
| at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$65.apply(Typers.scala:3151) | |
| at scala.tools.nsc.typechecker.Typers$Typer$$anonfun$65.apply(Typers.scala:3151) | |
| at scala.collection.immutable.List.loop$1(List.scala:173) | |
| at scala.collection.immutable.List.mapConserve(List.scala:189) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typedStats(Typers.scala:3151) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typedPackageDef$1(Typers.scala:5014) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typedMemberDef$1(Typers.scala:5311) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typed1(Typers.scala:5358) | |
| at scala.tools.nsc.typechecker.Typers$Typer.runTyper$1(Typers.scala:5395) | |
| at scala.tools.nsc.typechecker.Typers$Typer.scala$tools$nsc$typechecker$Typers$Typer$$typedInternal(Typers.scala:5422) | |
| at scala.tools.nsc.typechecker.Typers$Typer.body$2(Typers.scala:5369) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5373) | |
| at scala.tools.nsc.typechecker.Typers$Typer.typed(Typers.scala:5447) | |
| at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3.apply(Analyzer.scala:102) | |
| at scala.tools.nsc.Global$GlobalPhase$$anonfun$applyPhase$1.apply$mcV$sp(Global.scala:440) | |
| at scala.tools.nsc.Global$GlobalPhase.withCurrentUnit(Global.scala:431) | |
| at scala.tools.nsc.Global$GlobalPhase.applyPhase(Global.scala:440) | |
| at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3$$anonfun$run$1.apply(Analyzer.scala:94) | |
| at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3$$anonfun$run$1.apply(Analyzer.scala:93) | |
| at scala.collection.Iterator$class.foreach(Iterator.scala:742) | |
| at scala.collection.AbstractIterator.foreach(Iterator.scala:1194) | |
| at scala.tools.nsc.typechecker.Analyzer$typerFactory$$anon$3.run(Analyzer.scala:93) | |
| at scala.tools.nsc.Global$Run.compileUnitsInternal(Global.scala:1501) | |
| at scala.tools.nsc.Global$Run.compileUnits(Global.scala:1486) | |
| at scala.tools.nsc.Global$Run.compileSources(Global.scala:1481) | |
| at scala.tools.nsc.Global$Run.compile(Global.scala:1582) | |
| at xsbt.CachedCompiler0.run(CompilerInterface.scala:116) | |
| at xsbt.CachedCompiler0.run(CompilerInterface.scala:95) | |
| at xsbt.CompilerInterface.run(CompilerInterface.scala:26) | |
| 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.compile(AnalyzingCompiler.scala:47) | |
| at sbt.compiler.AnalyzingCompiler.compile(AnalyzingCompiler.scala:41) | |
| at sbt.compiler.MixedAnalyzingCompiler$$anonfun$compileScala$1$1.apply$mcV$sp(MixedAnalyzingCompiler.scala:51) | |
| at sbt.compiler.MixedAnalyzingCompiler$$anonfun$compileScala$1$1.apply(MixedAnalyzingCompiler.scala:51) | |
| at sbt.compiler.MixedAnalyzingCompiler$$anonfun$compileScala$1$1.apply(MixedAnalyzingCompiler.scala:51) | |
| at sbt.compiler.MixedAnalyzingCompiler.timed(MixedAnalyzingCompiler.scala:75) | |
| at sbt.compiler.MixedAnalyzingCompiler.compileScala$1(MixedAnalyzingCompiler.scala:50) | |
| at sbt.compiler.MixedAnalyzingCompiler.compile(MixedAnalyzingCompiler.scala:65) | |
| at sbt.compiler.IC$$anonfun$compileInternal$1.apply(IncrementalCompiler.scala:160) | |
| at sbt.compiler.IC$$anonfun$compileInternal$1.apply(IncrementalCompiler.scala:160) | |
| at sbt.inc.IncrementalCompile$$anonfun$doCompile$1.apply(Compile.scala:66) | |
| at sbt.inc.IncrementalCompile$$anonfun$doCompile$1.apply(Compile.scala:64) | |
| at sbt.inc.IncrementalCommon.cycle(IncrementalCommon.scala:31) | |
| at sbt.inc.Incremental$$anonfun$1.apply(Incremental.scala:62) | |
| at sbt.inc.Incremental$$anonfun$1.apply(Incremental.scala:61) | |
| at sbt.inc.Incremental$.manageClassfiles(Incremental.scala:89) | |
| at sbt.inc.Incremental$.compile(Incremental.scala:61) | |
| at sbt.inc.IncrementalCompile$.apply(Compile.scala:54) | |
| at sbt.compiler.IC$.compileInternal(IncrementalCompiler.scala:160) | |
| at sbt.compiler.IC$.incrementalCompile(IncrementalCompiler.scala:138) | |
| at sbt.Compiler$.compile(Compiler.scala:128) | |
| at sbt.Compiler$.compile(Compiler.scala:114) | |
| at sbt.Defaults$.sbt$Defaults$$compileIncrementalTaskImpl(Defaults.scala:814) | |
| at sbt.Defaults$$anonfun$compileIncrementalTask$1.apply(Defaults.scala:805) | |
| at sbt.Defaults$$anonfun$compileIncrementalTask$1.apply(Defaults.scala:803) | |
| 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:226) | |
| at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:226) | |
| at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17) | |
| at sbt.Execute.work(Execute.scala:235) | |
| at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:226) | |
| at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:226) | |
| 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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