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Kwestor/compilercrash.scala

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Demonstration of compiler crash with Scala 2.11.8
Raw
compilercrash.scala
package dynamicrash
import scala.language.dynamics
class Config
trait Extractor[A] {
def extract(config: Config, name: String): A
}
object Extractor {
// note missing "implicit"
val stringExtractor = new Extractor[String] {
override def extract(config: Config, name: String): String = ???
}
}
class Workspace extends Dynamic {
val config: Config = new Config
def selectDynamic[A](name: String)(implicit extractor: Extractor[A]): A =
extractor.extract(config, name)
}
object Main {
val storage = new Workspace
// this line works fine
// val a = storage.foo
// this line crashes the compiler ("head of empty list")
// println(storage.foo[String])
// this line crashes the compiler in different way ("unknown type")
// println(storage.foo)
}
/*
First stack trace:
Error:scalac: Error: head of empty list
java.util.NoSuchElementException: head of empty list
at scala.collection.immutable.Nil$.head(List.scala:420)
at scala.collection.immutable.Nil$.head(List.scala:417)
at scala.tools.nsc.typechecker.ContextErrors$InferencerContextErrors$InferErrorGen$.NotWithinBoundsErrorMessage(ContextErrors.scala:1011)
at scala.tools.nsc.typechecker.ContextErrors$InferencerContextErrors$InferErrorGen$.NotWithinBounds(ContextErrors.scala:1018)
at scala.tools.nsc.typechecker.Infer$Inferencer.issueBoundsError$1(Infer.scala:887)
at scala.tools.nsc.typechecker.Infer$Inferencer.check$1(Infer.scala:893)
at scala.tools.nsc.typechecker.Infer$Inferencer.checkBounds(Infer.scala:897)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer.checkBounds(RefChecks.scala:1267)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer.transform(RefChecks.scala:1714)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer.transform(RefChecks.scala:111)
at scala.reflect.api.Trees$Transformer$$anonfun$transformTrees$1.apply(Trees.scala:2559)
at scala.reflect.api.Trees$Transformer$$anonfun$transformTrees$1.apply(Trees.scala:2559)
at scala.collection.immutable.List.loop$1(List.scala:173)
at scala.collection.immutable.List.mapConserve(List.scala:189)
at scala.reflect.api.Trees$Transformer.transformTrees(Trees.scala:2559)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1347)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2555)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer.transform(RefChecks.scala:1785)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer.transformStat(RefChecks.scala:1262)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer$$anonfun$transformStats$1.apply(RefChecks.scala:1165)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer$$anonfun$transformStats$1.apply(RefChecks.scala:1165)
at scala.collection.immutable.List.flatMap(List.scala:327)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer.transformStats(RefChecks.scala:1165)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer.transformStats(RefChecks.scala:111)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1404)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2555)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer.transform(RefChecks.scala:1785)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer.transform(RefChecks.scala:111)
at scala.reflect.api.Trees$Transformer.transformTemplate(Trees.scala:2563)
at scala.reflect.internal.Trees$$anonfun$itransform$4.apply(Trees.scala:1408)
at scala.reflect.internal.Trees$$anonfun$itransform$4.apply(Trees.scala:1407)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2600)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1406)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2555)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer.transform(RefChecks.scala:1785)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer.transform(RefChecks.scala:111)
at scala.reflect.api.Trees$Transformer$$anonfun$transformTrees$1.apply(Trees.scala:2559)
at scala.reflect.api.Trees$Transformer$$anonfun$transformTrees$1.apply(Trees.scala:2559)
at scala.collection.immutable.List.loop$1(List.scala:173)
at scala.collection.immutable.List.mapConserve(List.scala:189)
at scala.reflect.api.Trees$Transformer.transformTrees(Trees.scala:2559)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer$$anonfun$eliminateModuleDefs$1.apply(RefChecks.scala:1236)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer$$anonfun$eliminateModuleDefs$1.apply(RefChecks.scala:1182)
at scala.reflect.internal.SymbolTable.enteringPhase(SymbolTable.scala:235)
at scala.reflect.internal.SymbolTable.exitingPhase(SymbolTable.scala:256)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer.eliminateModuleDefs(RefChecks.scala:1182)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer.transformStat(RefChecks.scala:1248)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer$$anonfun$transformStats$1.apply(RefChecks.scala:1165)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer$$anonfun$transformStats$1.apply(RefChecks.scala:1165)
at scala.collection.immutable.List.flatMap(List.scala:327)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer.transformStats(RefChecks.scala:1165)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer.transformStats(RefChecks.scala:111)
at scala.reflect.internal.Trees$$anonfun$itransform$7.apply(Trees.scala:1426)
at scala.reflect.internal.Trees$$anonfun$itransform$7.apply(Trees.scala:1426)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2600)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1425)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2555)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer.transform(RefChecks.scala:1785)
at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer.transform(RefChecks.scala:111)
at scala.tools.nsc.ast.Trees$Transformer.transformUnit(Trees.scala:147)
at scala.tools.nsc.transform.Transform$Phase.apply(Transform.scala:30)
at scala.tools.nsc.Global$GlobalPhase$$anonfun$applyPhase$1.apply$mcV$sp(Global.scala:440)
at scala.tools.nsc.Global$GlobalPhase.withCurrentUnit(Global.scala:431)
at scala.tools.nsc.Global$GlobalPhase.applyPhase(Global.scala:440)
at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:398)
at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:398)
at scala.collection.Iterator$class.foreach(Iterator.scala:893)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1336)
at scala.tools.nsc.Global$GlobalPhase.run(Global.scala:398)
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:115)
at xsbt.CachedCompiler0.run(CompilerInterface.scala:94)
at xsbt.CompilerInterface.run(CompilerInterface.scala:22)
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:606)
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 org.jetbrains.jps.incremental.scala.local.IdeaIncrementalCompiler.compile(IdeaIncrementalCompiler.scala:29)
at org.jetbrains.jps.incremental.scala.local.LocalServer.compile(LocalServer.scala:26)
at org.jetbrains.jps.incremental.scala.remote.Main$.make(Main.scala:67)
at org.jetbrains.jps.incremental.scala.remote.Main$.nailMain(Main.scala:24)
at org.jetbrains.jps.incremental.scala.remote.Main.nailMain(Main.scala)
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:606)
at com.martiansoftware.nailgun.NGSession.run(NGSession.java:319)
---
Second stack trace:
Error:scalac: Error:
Unknown type: <error>, <error> [class scala.reflect.internal.Types$ErrorType$, class scala.reflect.internal.Types$ErrorType$] TypeRef? false
while compiling: C:\Users\Jerzy\Desktop\Scala\2.11\src\main\scala\dynamicrash\Defaults.scala
during phase: icode
library version: version 2.11.8
compiler version: version 2.11.8
reconstructed args: -nobootcp -javabootclasspath ; -classpath C:\Program Files\Java\jdk1.7.0_60\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\jce.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\jfxrt.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\resources.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\rt.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\ext\zipfs.jar;C:\Users\Jerzy\Desktop\Scala\2.11\target\scala-2.11\classes;C:\Users\Jerzy\.ivy2\cache\org.scala-lang\scala-compiler\jars\scala-compiler-2.11.8.jar;C:\Users\Jerzy\.ivy2\cache\org.scala-lang.modules\scala-xml_2.11\bundles\scala-xml_2.11-1.0.4.jar;C:\Users\Jerzy\.ivy2\cache\org.scala-lang.modules\scala-parser-combinators_2.11\bundles\scala-parser-combinators_2.11-1.0.4.jar;C:\Users\Jerzy\.ivy2\cache\org.scala-lang\scala-reflect\jars\scala-reflect-2.11.8.jar;C:\Users\Jerzy\.ivy2\cache\org.scala-lang\scala-library\jars\scala-library-2.11.8.jar
last tree to typer: Apply(constructor Workspace)
tree position: line 26 of C:\Users\Jerzy\Desktop\Scala\2.11\src\main\scala\dynamicrash\Defaults.scala
tree tpe: dynamicrash.Workspace
symbol: constructor Workspace in class Workspace
symbol definition: def <init>(): dynamicrash.Workspace (a MethodSymbol)
symbol package: dynamicrash
symbol owners: constructor Workspace -> class Workspace
call site: <$anon: dynamicrash.Extractor> in package dynamicrash in package dynamicrash
== Source file context for tree position ==
23
24 object Main {
25 val storage = new Workspace
26
27 // this line works fine
28 // val a = storage.foo
29
scala.reflect.internal.FatalError:
Unknown type: <error>, <error> [class scala.reflect.internal.Types$ErrorType$, class scala.reflect.internal.Types$ErrorType$] TypeRef? false
while compiling: C:\Users\Jerzy\Desktop\Scala\2.11\src\main\scala\dynamicrash\Defaults.scala
during phase: icode
library version: version 2.11.8
compiler version: version 2.11.8
reconstructed args: -nobootcp -javabootclasspath ; -classpath C:\Program Files\Java\jdk1.7.0_60\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\jce.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\jfxrt.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\resources.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\rt.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.7.0_60\jre\lib\ext\zipfs.jar;C:\Users\Jerzy\Desktop\Scala\2.11\target\scala-2.11\classes;C:\Users\Jerzy\.ivy2\cache\org.scala-lang\scala-compiler\jars\scala-compiler-2.11.8.jar;C:\Users\Jerzy\.ivy2\cache\org.scala-lang.modules\scala-xml_2.11\bundles\scala-xml_2.11-1.0.4.jar;C:\Users\Jerzy\.ivy2\cache\org.scala-lang.modules\scala-parser-combinators_2.11\bundles\scala-parser-combinators_2.11-1.0.4.jar;C:\Users\Jerzy\.ivy2\cache\org.scala-lang\scala-reflect\jars\scala-reflect-2.11.8.jar;C:\Users\Jerzy\.ivy2\cache\org.scala-lang\scala-library\jars\scala-library-2.11.8.jar
last tree to typer: Apply(constructor Workspace)
tree position: line 26 of C:\Users\Jerzy\Desktop\Scala\2.11\src\main\scala\dynamicrash\Defaults.scala
tree tpe: dynamicrash.Workspace
symbol: constructor Workspace in class Workspace
symbol definition: def <init>(): dynamicrash.Workspace (a MethodSymbol)
symbol package: dynamicrash
symbol owners: constructor Workspace -> class Workspace
call site: <$anon: dynamicrash.Extractor> in package dynamicrash in package dynamicrash
== Source file context for tree position ==
23
24 object Main {
25 val storage = new Workspace
26
27 // this line works fine
28 // val a = storage.foo
29
at scala.reflect.internal.Reporting$class.abort(Reporting.scala:59)
at scala.reflect.internal.SymbolTable.abort(SymbolTable.scala:16)
at scala.tools.nsc.backend.icode.TypeKinds$class.toTypeKind(TypeKinds.scala:401)
at scala.tools.nsc.backend.icode.ICodes.toTypeKind(ICodes.scala:19)
at scala.tools.nsc.backend.icode.GenICode$ICodePhase.genLoadSelect$1(GenICode.scala:847)
at scala.tools.nsc.backend.icode.GenICode$ICodePhase.scala$tools$nsc$backend$icode$GenICode$ICodePhase$$genLoad(GenICode.scala:869)
at scala.tools.nsc.backend.icode.GenICode$ICodePhase$$anonfun$genLoadArguments$1.apply(GenICode.scala:1140)
at scala.tools.nsc.backend.icode.GenICode$ICodePhase$$anonfun$genLoadArguments$1.apply(GenICode.scala:1138)
at scala.collection.LinearSeqOptimized$class.foldLeft(LinearSeqOptimized.scala:124)
at scala.collection.immutable.List.foldLeft(List.scala:84)
at scala.tools.nsc.backend.icode.GenICode$ICodePhase.genLoadArguments(GenICode.scala:1138)
at scala.tools.nsc.backend.icode.GenICode$ICodePhase.genLoadApply6$1(GenICode.scala:778)
at scala.tools.nsc.backend.icode.GenICode$ICodePhase.scala$tools$nsc$backend$icode$GenICode$ICodePhase$$genLoad(GenICode.scala:809)
at scala.tools.nsc.backend.icode.GenICode$ICodePhase.scala$tools$nsc$backend$icode$GenICode$ICodePhase$$genStat(GenICode.scala:181)
at scala.tools.nsc.backend.icode.GenICode$ICodePhase$$anonfun$genStat$1.apply(GenICode.scala:155)
at scala.tools.nsc.backend.icode.GenICode$ICodePhase$$anonfun$genStat$1.apply(GenICode.scala:155)
at scala.collection.LinearSeqOptimized$class.foldLeft(LinearSeqOptimized.scala:124)
at scala.collection.immutable.List.foldLeft(List.scala:84)
at scala.tools.nsc.backend.icode.GenICode$ICodePhase.scala$tools$nsc$backend$icode$GenICode$ICodePhase$$genLoad(GenICode.scala:922)
at scala.tools.nsc.backend.icode.GenICode$ICodePhase.gen(GenICode.scala:123)
at scala.tools.nsc.backend.icode.GenICode$ICodePhase.gen(GenICode.scala:71)
at scala.tools.nsc.backend.icode.GenICode$ICodePhase.gen(GenICode.scala:148)
at scala.tools.nsc.backend.icode.GenICode$ICodePhase.gen(GenICode.scala:98)
at scala.tools.nsc.backend.icode.GenICode$ICodePhase.gen(GenICode.scala:71)
at scala.tools.nsc.backend.icode.GenICode$ICodePhase.gen(GenICode.scala:89)
at scala.tools.nsc.backend.icode.GenICode$ICodePhase.gen(GenICode.scala:67)
at scala.tools.nsc.backend.icode.GenICode$ICodePhase.apply(GenICode.scala:63)
at scala.tools.nsc.Global$GlobalPhase$$anonfun$applyPhase$1.apply$mcV$sp(Global.scala:440)
at scala.tools.nsc.Global$GlobalPhase.withCurrentUnit(Global.scala:431)
at scala.tools.nsc.Global$GlobalPhase.applyPhase(Global.scala:440)
at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:398)
at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:398)
at scala.collection.Iterator$class.foreach(Iterator.scala:893)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1336)
at scala.tools.nsc.Global$GlobalPhase.run(Global.scala:398)
at scala.tools.nsc.backend.icode.GenICode$ICodePhase.run(GenICode.scala:55)
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:115)
at xsbt.CachedCompiler0.run(CompilerInterface.scala:94)
at xsbt.CompilerInterface.run(CompilerInterface.scala:22)
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:606)
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 org.jetbrains.jps.incremental.scala.local.IdeaIncrementalCompiler.compile(IdeaIncrementalCompiler.scala:29)
at org.jetbrains.jps.incremental.scala.local.LocalServer.compile(LocalServer.scala:26)
at org.jetbrains.jps.incremental.scala.remote.Main$.make(Main.scala:67)
at org.jetbrains.jps.incremental.scala.remote.Main$.nailMain(Main.scala:24)
at org.jetbrains.jps.incremental.scala.remote.Main.nailMain(Main.scala)
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:606)
at com.martiansoftware.nailgun.NGSession.run(NGSession.java:319)
*/
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