2.12.0 - java.lang.ArrayIndexOutOfBoundsException: -1 when emitting code

[Marek Żebrowski]

I think I've hit a bug in 2.12.0 compiler:

java.lang.ArrayIndexOutOfBoundsException: -1

at scala.tools.nsc.backend.jvm.analysis.BackendUtils.enqInsnIndex$1(BackendUtils.scala:430)

at scala.tools.nsc.backend.jvm.analysis.BackendUtils.enqInsn$1(BackendUtils.scala:426)

at scala.tools.nsc.backend.jvm.analysis.BackendUtils.computeMaxLocalsMaxStack(BackendUtils.scala:477)

at scala.tools.nsc.backend.jvm.analysis.BackendUtils$AsmAnalyzer.<init>(BackendUtils.scala:35)

at scala.tools.nsc.backend.jvm.opt.LocalOpt.removeUnreachableCodeImpl(LocalOpt.scala:488)

at scala.tools.nsc.backend.jvm.opt.LocalOpt.removalRound$2(LocalOpt.scala:275)

at scala.tools.nsc.backend.jvm.opt.LocalOpt.methodOptimizations(LocalOpt.scala:354)

at scala.tools.nsc.backend.jvm.opt.LocalOpt.$anonfun$methodOptimizations$1(LocalOpt.scala:195)

at scala.tools.nsc.backend.jvm.opt.LocalOpt.$anonfun$methodOptimizations$1$adapted(LocalOpt.scala:194)

at scala.collection.TraversableOnce.$anonfun$foldLeft$1(TraversableOnce.scala:157)

at scala.collection.TraversableOnce.$anonfun$foldLeft$1$adapted(TraversableOnce.scala:157)

at scala.collection.AbstractIterator.foreach(Iterator.scala:932)

at scala.collection.AbstractIterable.foreach(Iterable.scala:54)

at scala.collection.TraversableOnce.foldLeft(TraversableOnce.scala:157)

at scala.collection.TraversableOnce.foldLeft$(TraversableOnce.scala:155)

at scala.collection.AbstractTraversable.foldLeft(Traversable.scala:104)

at scala.tools.nsc.backend.jvm.opt.LocalOpt.methodOptimizations(LocalOpt.scala:194)

at scala.tools.nsc.backend.jvm.GenBCode$BCodePhase$Worker2.$anonfun$localOptimizations$1(GenBCode.scala:248)

at scala.tools.nsc.backend.jvm.GenBCode$BCodePhase$Worker2.localOptimizations(GenBCode.scala:248)

at scala.tools.nsc.backend.jvm.GenBCode$BCodePhase$Worker2.run(GenBCode.scala:267)

at scala.tools.nsc.backend.jvm.GenBCode$BCodePhase.buildAndSendToDisk(GenBCode.scala:384)

at scala.tools.nsc.backend.jvm.GenBCode$BCodePhase.run(GenBCode.scala:350)

at scala.tools.nsc.Global$Run.compileUnitsInternal(Global.scala:1404)

at scala.tools.nsc.Global$Run.compileUnits(Global.scala:1389)

at scala.tools.nsc.Global$Run.compileSources(Global.scala:1384)

at scala.tools.nsc.Global$Run.compile(Global.scala:1478)

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:498)

at sbt.compiler.AnalyzingCompiler.call(AnalyzingCompiler.scala:107)

at sbt.compiler.AnalyzingCompiler.compile(AnalyzingCompiler.scala:53)

at sbt.compiler.AnalyzingCompiler.compile(AnalyzingCompiler.scala:47)

at sbt.compiler.MixedAnalyzingCompiler$$anonfun$compileScala$1$1.apply$mcV$sp(MixedAnalyzingCompiler.scala:50)

at sbt.compiler.MixedAnalyzingCompiler$$anonfun$compileScala$1$1.apply(MixedAnalyzingCompiler.scala:50)

at sbt.compiler.MixedAnalyzingCompiler$$anonfun$compileScala$1$1.apply(MixedAnalyzingCompiler.scala:50)

at sbt.compiler.MixedAnalyzingCompiler.timed(MixedAnalyzingCompiler.scala:74)

at sbt.compiler.MixedAnalyzingCompiler.compileScala$1(MixedAnalyzingCompiler.scala:49)

at sbt.compiler.MixedAnalyzingCompiler.compile(MixedAnalyzingCompiler.scala:64)

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:32)

at sbt.inc.Incremental$$anonfun$1.apply(Incremental.scala:72)

at sbt.inc.Incremental$$anonfun$1.apply(Incremental.scala:71)

at sbt.inc.Incremental$.manageClassfiles(Incremental.scala:99)

at sbt.inc.Incremental$.compile(Incremental.scala:71)

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:155)

at sbt.Compiler$.compile(Compiler.scala:141)

at sbt.Defaults$.sbt$Defaults$$compileIncrementalTaskImpl(Defaults.scala:879)

at sbt.Defaults$$anonfun$compileIncrementalTask$1.apply(Defaults.scala:870)

at sbt.Defaults$$anonfun$compileIncrementalTask$1.apply(Defaults.scala:868)

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)

[error] Error while emitting net/liftweb/actor/SpecializedLiftActor

[error] -1

[error] one error found

I have a full sourcecode https://github.com/sgrouples/framework/tree/scala-2.12.0-wip - which is attempt to upgrade Lift framework version 2.6 to scala 2.12.0

Unfortunately I don't know how to minimize that to open better test case.

Stacktrace leads to

if (insnIndex < size && stackHeights(insnIndex) != -1) { So insnIndex is equal -1 obviously. Should I try to open Bug report with that finding ?

[Lukas Rytz]

Hi Marek

Yes, please file a bug, even if it's not minimized. I'll take a look on Monday.

Thank you!

Lukas

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[Marek Żebrowski]

https://issues.scala-lang.org/browse/SI-10032

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