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While working with 2.11.5 in sbt's console I've faced the following issue:
scala> scala.util.Properties.versionString
res0:String= version 2.11.5
scala>vals=Seq(1->2)
s:Seq[(Int, Int)] =List((1,2))
scala> s.groupBy(_._1)
java.lang.AssertionError: assertion failed: List(value _1$mcI$sp, value _1$mcI$sp, value _1$mcI$sp)
at scala.reflect.internal.Symbols$Symbol.suchThat(Symbols.scala:1916)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.matchingSymbolInPrefix$1(SpecializeTypes.scala:1460)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transformSelect$1(SpecializeTypes.scala:1483)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform1(SpecializeTypes.scala:1579)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.reportError(SpecializeTypes.scala:1420)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1371)
at scala.reflect.internal.Trees$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$Transformer.transform(Trees.scala:2555)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:44)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform1(SpecializeTypes.scala:1712)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.reportError(SpecializeTypes.scala:1420)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1371)
at scala.reflect.internal.Trees$$anonfun$itransform$2.apply(Trees.scala:1363)
at scala.reflect.internal.Trees$$anonfun$itransform$2.apply(Trees.scala:1361)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2600)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:30)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:25)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:17)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1360)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2555)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:44)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform1(SpecializeTypes.scala:1692)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.reportError(SpecializeTypes.scala:1420)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1371)
at scala.reflect.api.Trees$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.transform.SpecializeTypes$$anon$2$$anonfun$transformTemplate$1$1.apply(SpecializeTypes.scala:1599)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transformTemplate$1$1.apply(SpecializeTypes.scala:1599)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2600)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:30)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transformTemplate$1(SpecializeTypes.scala:1599)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform1(SpecializeTypes.scala:1601)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.reportError(SpecializeTypes.scala:1420)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1371)
at scala.reflect.api.Trees$Transformer.transformTemplate(Trees.scala:2563)
at scala.reflect.internal.Trees$$anonfun$itransform$4.apply(Trees.scala:1408)
at scala.reflect.internal.Trees$$anonfun$itransform$4.apply(Trees.scala:1407)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2600)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:30)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:25)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:17)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1406)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2555)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:44)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform1(SpecializeTypes.scala:1712)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.reportError(SpecializeTypes.scala:1420)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1371)
at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:2589)
at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:2587)
at scala.collection.immutable.List.loop$1(List.scala:173)
at scala.collection.immutable.List.mapConserve(List.scala:189)
at scala.reflect.api.Trees$Transformer.transformStats(Trees.scala:2587)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1366)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2555)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:44)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform1(SpecializeTypes.scala:1712)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.reportError(SpecializeTypes.scala:1420)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1371)
at scala.reflect.api.Trees$Transformer$$anonfun$transformTrees$1.apply(Trees.scala:2559)
at scala.reflect.api.Trees$Transformer$$anonfun$transformTrees$1.apply(Trees.scala:2559)
at scala.collection.immutable.List.loop$1(List.scala:173)
at scala.collection.immutable.List.mapConserve(List.scala:189)
at scala.reflect.api.Trees$Transformer.transformTrees(Trees.scala:2559)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1347)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2555)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:44)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform1(SpecializeTypes.scala:1712)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.reportError(SpecializeTypes.scala:1420)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1371)
at scala.reflect.internal.Trees$$anonfun$itransform$1.apply(Trees.scala:1357)
at scala.reflect.internal.Trees$$anonfun$itransform$1.apply(Trees.scala:1356)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2600)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:30)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:25)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:17)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1355)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2555)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:44)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform1(SpecializeTypes.scala:1712)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.reportError(SpecializeTypes.scala:1420)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1371)
at scala.reflect.api.Trees$Transformer$$anonfun$transformTrees$1.apply(Trees.scala:2559)
at scala.reflect.api.Trees$Transformer$$anonfun$transformTrees$1.apply(Trees.scala:2559)
at scala.collection.immutable.List.loop$1(List.scala:173)
at scala.collection.immutable.List.mapConserve(List.scala:189)
at scala.reflect.api.Trees$Transformer.transformTrees(Trees.scala:2559)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transformTemplate$1$1.apply(SpecializeTypes.scala:1599)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transformTemplate$1$1.apply(SpecializeTypes.scala:1599)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2600)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:30)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transformTemplate$1(SpecializeTypes.scala:1599)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform1(SpecializeTypes.scala:1601)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.reportError(SpecializeTypes.scala:1420)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1371)
at scala.reflect.api.Trees$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.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:30)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:25)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:17)
at scala.reflect.internal.Trees$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$Transformer.transform(Trees.scala:2555)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:44)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform1(SpecializeTypes.scala:1712)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.reportError(SpecializeTypes.scala:1420)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1371)
at scala.reflect.api.Trees$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.transform.SpecializeTypes$$anon$2$$anonfun$transformTemplate$1$1.apply(SpecializeTypes.scala:1599)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transformTemplate$1$1.apply(SpecializeTypes.scala:1599)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2600)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:30)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transformTemplate$1(SpecializeTypes.scala:1599)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform1(SpecializeTypes.scala:1601)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.reportError(SpecializeTypes.scala:1420)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1371)
at scala.reflect.api.Trees$Transformer.transformTemplate(Trees.scala:2563)
at scala.reflect.internal.Trees$$anonfun$itransform$4.apply(Trees.scala:1408)
at scala.reflect.internal.Trees$$anonfun$itransform$4.apply(Trees.scala:1407)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2600)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:30)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:25)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:17)
at scala.reflect.internal.Trees$class.itransform(Trees.scala:1406)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.internal.SymbolTable.itransform(SymbolTable.scala:16)
at scala.reflect.api.Trees$Transformer.transform(Trees.scala:2555)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:44)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform1(SpecializeTypes.scala:1712)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.reportError(SpecializeTypes.scala:1420)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1371)
at scala.reflect.api.Trees$Transformer$$anonfun$transformTrees$1.apply(Trees.scala:2559)
at scala.reflect.api.Trees$Transformer$$anonfun$transformTrees$1.apply(Trees.scala:2559)
at scala.collection.immutable.List.loop$1(List.scala:173)
at scala.collection.immutable.List.mapConserve(List.scala:189)
at scala.reflect.api.Trees$Transformer.transformTrees(Trees.scala:2559)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transformTemplate$1$1.apply(SpecializeTypes.scala:1599)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transformTemplate$1$1.apply(SpecializeTypes.scala:1599)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2600)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:30)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transformTemplate$1(SpecializeTypes.scala:1599)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform1(SpecializeTypes.scala:1601)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.reportError(SpecializeTypes.scala:1420)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1371)
at scala.reflect.api.Trees$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.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:30)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:25)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:17)
at scala.reflect.internal.Trees$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$Transformer.transform(Trees.scala:2555)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:44)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform1(SpecializeTypes.scala:1712)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.reportError(SpecializeTypes.scala:1420)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1371)
at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:2589)
at scala.reflect.api.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:2587)
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.transformStats(Trees.scala:2587)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform1$6.apply(SpecializeTypes.scala:1585)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform1$6.apply(SpecializeTypes.scala:1583)
at scala.reflect.api.Trees$Transformer.atOwner(Trees.scala:2600)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:30)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform1(SpecializeTypes.scala:1583)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2$$anonfun$transform$3.apply(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.reportError(SpecializeTypes.scala:1420)
at scala.tools.nsc.transform.SpecializeTypes$$anon$2.transform(SpecializeTypes.scala:1428)
at scala.tools.nsc.transform.SpecializeTypes$SpecializationTransformer$$anonfun$54.apply(SpecializeTypes.scala:1949)
at scala.tools.nsc.transform.SpecializeTypes$SpecializationTransformer$$anonfun$54.apply(SpecializeTypes.scala:1949)
at scala.reflect.internal.SymbolTable.enteringPhase(SymbolTable.scala:235)
at scala.reflect.internal.SymbolTable.exitingPhase(SymbolTable.scala:256)
at scala.tools.nsc.transform.SpecializeTypes$SpecializationTransformer.transform(SpecializeTypes.scala:1949)
at scala.tools.nsc.transform.SpecializeTypes$SpecializationTransformer.transform(SpecializeTypes.scala:1945)
at scala.tools.nsc.ast.Trees$Transformer.transformUnit(Trees.scala:147)
at scala.tools.nsc.transform.Transform$Phase.apply(Transform.scala:30)
at scala.tools.nsc.Global$GlobalPhase$$anonfun$applyPhase$1.apply$mcV$sp(Global.scala:441)
at scala.tools.nsc.Global$GlobalPhase.withCurrentUnit(Global.scala:432)
at scala.tools.nsc.Global$GlobalPhase.applyPhase(Global.scala:441)
at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:399)
at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:399)
at scala.collection.Iterator$class.foreach(Iterator.scala:750)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1202)
at scala.tools.nsc.Global$GlobalPhase.run(Global.scala:399)
at scala.tools.nsc.Global$Run.compileUnitsInternal(Global.scala:1500)
at scala.tools.nsc.Global$Run.compileUnits(Global.scala:1487)
at scala.tools.nsc.Global$Run.compileSources(Global.scala:1482)
at scala.tools.nsc.interpreter.IMain.compileSourcesKeepingRun(IMain.scala:425)
at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.compileAndSaveRun(IMain.scala:841)
at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.compile(IMain.scala:800)
at scala.tools.nsc.interpreter.IMain$Request.compile$lzycompute(IMain.scala:976)
at scala.tools.nsc.interpreter.IMain$Request.compile(IMain.scala:971)
at scala.tools.nsc.interpreter.IMain.compile(IMain.scala:568)
at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:556)
at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:554)
at scala.tools.nsc.interpreter.ILoop.reallyInterpret$1(ILoop.scala:802)
at scala.tools.nsc.interpreter.ILoop.interpretStartingWith(ILoop.scala:847)
at scala.tools.nsc.interpreter.ILoop.command(ILoop.scala:705)
at scala.tools.nsc.interpreter.ILoop.processLine(ILoop.scala:404)
at scala.tools.nsc.interpreter.ILoop.loop(ILoop.scala:430)
at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply$mcZ$sp(ILoop.scala:918)
at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:904)
at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:904)
at scala.reflect.internal.util.ScalaClassLoader$.savingContextLoader(ScalaClassLoader.scala:97)
at scala.tools.nsc.interpreter.ILoop.process(ILoop.scala:904)
at scala.tools.nsc.interpreter.ILoop.main(ILoop.scala:929)
at xsbt.ConsoleInterface.run(ConsoleInterface.scala:62)
at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethod)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at sbt.compiler.AnalyzingCompiler.call(AnalyzingCompiler.scala:101)
at sbt.compiler.AnalyzingCompiler.console(AnalyzingCompiler.scala:76)
at sbt.Console.sbt$Console$$console0$1(Console.scala:22)
at sbt.Console$$anonfun$apply$2$$anonfun$apply$1.apply$mcV$sp(Console.scala:23)
at sbt.Console$$anonfun$apply$2$$anonfun$apply$1.apply(Console.scala:23)
at sbt.Console$$anonfun$apply$2$$anonfun$apply$1.apply(Console.scala:23)
at sbt.Logger$$anon$4.apply(Logger.scala:85)
at sbt.TrapExit$App.run(TrapExit.scala:248)
at java.lang.Thread.run(Thread.java:745)
That entry seems to have slain the compiler. ShallI replay
your session?I can re-run each line except the last one.
[y/n]
While working with 2.11.5 in sbt's console I've faced the following issue:
See https://gist.github.com/jaceklaskowski/7ad1864c9e0687b47807.
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