Scala 2.8.RC2 plugin in an up-to-date Eclipse 3.5 on Mac OS X 10.6.3 with Java 1.6.0_17

I have a project that builds fine when I clean it, but the build fails when I just change a single file. The trace below appears in the error log. The project also builds fine using sbt and Scala 2.8.RC2.

Happy to provide extra information if it would be of use.

Tony

Warning
Sun May 16 22:09:10 EST 2010
Errors running builder 'Scala Builder' on project 'PrologK'.

java.lang.IndexOutOfBoundsException
at scala.collection.LinearSeqOptimized$class.apply(LinearSeqOptimized.scala:54)
at scala.collection.immutable.List.apply(List.scala:46)
at scala.tools.nsc.matching.Matrix$MatrixContext$PatternVarGroup.apply(Matrix.scala:141)
at scala.tools.nsc.matching.ParallelMatching$MatchMatrix$$anonfun$1$$anonfun$apply$1.apply(ParallelMatching.scala:77)
at scala.tools.nsc.matching.ParallelMatching$MatchMatrix$$anonfun$1$$anonfun$apply$1.apply(ParallelMatching.scala:77)
at scala.Function2$$anonfun$tupled$1.apply(Function2.scala:54)
at scala.Function2$$anonfun$tupled$1.apply(Function2.scala:53)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:203)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:203)
at scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.scala:62)
at scala.collection.immutable.List.foreach(List.scala:46)
at scala.collection.TraversableLike$class.map(TraversableLike.scala:203)
at scala.collection.immutable.List.map(List.scala:46)
at scala.tools.nsc.matching.ParallelMatching$MatchMatrix$Row.expandAlternatives(ParallelMatching.scala:627)
at scala.tools.nsc.matching.ParallelMatching$MatchMatrix$$anonfun$1.apply(ParallelMatching.scala:77)
at scala.tools.nsc.matching.ParallelMatching$MatchMatrix$$anonfun$1.apply(ParallelMatching.scala:77)
at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:224)
at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:224)
at scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.scala:62)
at scala.collection.immutable.List.foreach(List.scala:46)
at scala.collection.TraversableLike$class.flatMap(TraversableLike.scala:224)
at scala.collection.immutable.List.flatMap(List.scala:46)
at scala.tools.nsc.matching.ParallelMatching$MatchMatrix.make(ParallelMatching.scala:77)
at scala.tools.nsc.matching.ParallelMatching$MatchMatrix$RuleApplication.remake(ParallelMatching.scala:261)
at scala.tools.nsc.matching.ParallelMatching$MatchMatrix$MixTypes.success(ParallelMatching.scala:585)
at scala.tools.nsc.matching.ParallelMatching$MatchMatrix$RuleApplication.codegen(ParallelMatching.scala:249)
at scala.tools.nsc.matching.ParallelMatching$MatchMatrix$MixTypes.tree(ParallelMatching.scala:592)
at scala.tools.nsc.matching.ParallelMatching$MatchMatrix$Rep.applyRule(ParallelMatching.scala:780)
at scala.tools.nsc.matching.TransMatcher$class.handlePattern(TransMatcher.scala:80)
at scala.tools.nsc.transform.ExplicitOuter.handlePattern(ExplicitOuter.scala:20)
at scala.tools.nsc.transform.ExplicitOuter$ExplicitOuterTransformer.matchTranslation(ExplicitOuter.scala:395)
at scala.tools.nsc.transform.ExplicitOuter$ExplicitOuterTransformer.transform(ExplicitOuter.scala:484)
at scala.tools.nsc.ast.Trees$Transformer$$anonfun$transform$5.apply(Trees.scala:743)
at scala.tools.nsc.ast.Trees$Transformer$$anonfun$transform$5.apply(Trees.scala:741)
at scala.tools.nsc.ast.Trees$Transformer.atOwner(Trees.scala:857)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:36)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:29)
at scala.tools.nsc.ast.Trees$Transformer.transform(Trees.scala:740)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:51)
at scala.tools.nsc.transform.ExplicitOuter$OuterPathTransformer.transform(ExplicitOuter.scala:234)
at scala.tools.nsc.transform.ExplicitOuter$ExplicitOuterTransformer.transform(ExplicitOuter.scala:453)
at scala.tools.nsc.ast.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:849)
at scala.tools.nsc.ast.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:847)
at scala.collection.immutable.List.loop$1(List.scala:116)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.tools.nsc.ast.Trees$Transformer.transformStats(Trees.scala:847)
at scala.tools.nsc.ast.Trees$Transformer.transform(Trees.scala:757)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.scala$tools$nsc$transform$TypingTransformers$TypingTransformer$$super$transform(TypingTransformers.scala:47)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$1.apply(TypingTransformers.scala:47)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$1.apply(TypingTransformers.scala:47)
at scala.tools.nsc.ast.Trees$Transformer.atOwner(Trees.scala:857)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:36)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:29)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:47)
at scala.tools.nsc.transform.ExplicitOuter$OuterPathTransformer.transform(ExplicitOuter.scala:234)
at scala.tools.nsc.transform.ExplicitOuter$ExplicitOuterTransformer.transform(ExplicitOuter.scala:433)
at scala.tools.nsc.ast.Trees$Transformer.transformTemplate(Trees.scala:833)
at scala.tools.nsc.ast.Trees$Transformer$$anonfun$transform$2.apply(Trees.scala:727)
at scala.tools.nsc.ast.Trees$Transformer$$anonfun$transform$2.apply(Trees.scala:726)
at scala.tools.nsc.ast.Trees$Transformer.atOwner(Trees.scala:857)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:36)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:29)
at scala.tools.nsc.ast.Trees$Transformer.transform(Trees.scala:725)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:51)
at scala.tools.nsc.transform.ExplicitOuter$OuterPathTransformer.transform(ExplicitOuter.scala:234)
at scala.tools.nsc.transform.ExplicitOuter$ExplicitOuterTransformer.transform(ExplicitOuter.scala:487)
at scala.tools.nsc.ast.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:849)
at scala.tools.nsc.ast.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:847)
at scala.collection.immutable.List.loop$1(List.scala:116)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.collection.immutable.List.loop$1(List.scala:120)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.tools.nsc.ast.Trees$Transformer.transformStats(Trees.scala:847)
at scala.tools.nsc.ast.Trees$Transformer.transform(Trees.scala:757)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.scala$tools$nsc$transform$TypingTransformers$TypingTransformer$$super$transform(TypingTransformers.scala:47)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$1.apply(TypingTransformers.scala:47)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$1.apply(TypingTransformers.scala:47)
at scala.tools.nsc.ast.Trees$Transformer.atOwner(Trees.scala:857)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:36)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:29)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:47)
at scala.tools.nsc.transform.ExplicitOuter$OuterPathTransformer.transform(ExplicitOuter.scala:234)
at scala.tools.nsc.transform.ExplicitOuter$ExplicitOuterTransformer.transform(ExplicitOuter.scala:433)
at scala.tools.nsc.ast.Trees$Transformer.transformTemplate(Trees.scala:833)
at scala.tools.nsc.ast.Trees$Transformer$$anonfun$transform$2.apply(Trees.scala:727)
at scala.tools.nsc.ast.Trees$Transformer$$anonfun$transform$2.apply(Trees.scala:726)
at scala.tools.nsc.ast.Trees$Transformer.atOwner(Trees.scala:857)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:36)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:29)
at scala.tools.nsc.ast.Trees$Transformer.transform(Trees.scala:725)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:51)
at scala.tools.nsc.transform.ExplicitOuter$OuterPathTransformer.transform(ExplicitOuter.scala:234)
at scala.tools.nsc.transform.ExplicitOuter$ExplicitOuterTransformer.transform(ExplicitOuter.scala:487)
at scala.tools.nsc.ast.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:849)
at scala.tools.nsc.ast.Trees$Transformer$$anonfun$transformStats$1.apply(Trees.scala:847)
at scala.collection.immutable.List.loop$1(List.scala:116)
at scala.collection.immutable.List.mapConserve(List.scala:133)
at scala.tools.nsc.ast.Trees$Transformer.transformStats(Trees.scala:847)
at scala.tools.nsc.ast.Trees$Transformer$$anonfun$transform$1.apply(Trees.scala:721)
at scala.tools.nsc.ast.Trees$Transformer$$anonfun$transform$1.apply(Trees.scala:721)
at scala.tools.nsc.ast.Trees$Transformer.atOwner(Trees.scala:857)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:36)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:29)
at scala.tools.nsc.ast.Trees$Transformer.transform(Trees.scala:720)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.scala$tools$nsc$transform$TypingTransformers$TypingTransformer$$super$transform(TypingTransformers.scala:47)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$2.apply(TypingTransformers.scala:49)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer$$anonfun$transform$2.apply(TypingTransformers.scala:49)
at scala.tools.nsc.ast.Trees$Transformer.atOwner(Trees.scala:857)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:36)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.atOwner(TypingTransformers.scala:29)
at scala.tools.nsc.transform.TypingTransformers$TypingTransformer.transform(TypingTransformers.scala:49)
at scala.tools.nsc.transform.ExplicitOuter$OuterPathTransformer.transform(ExplicitOuter.scala:234)
at scala.tools.nsc.transform.ExplicitOuter$ExplicitOuterTransformer.transform(ExplicitOuter.scala:487)
at scala.tools.nsc.ast.Trees$Transformer.transformUnit(Trees.scala:850)
at scala.tools.nsc.transform.ExplicitOuter$ExplicitOuterTransformer.scala$tools$nsc$transform$ExplicitOuter$ExplicitOuterTransformer$$super$transformUnit(ExplicitOuter.scala:497)
at scala.tools.nsc.transform.ExplicitOuter$ExplicitOuterTransformer$$anonfun$transformUnit$1.apply(ExplicitOuter.scala:497)
at scala.tools.nsc.transform.ExplicitOuter$ExplicitOuterTransformer$$anonfun$transformUnit$1.apply(ExplicitOuter.scala:497)
at scala.tools.nsc.symtab.SymbolTable.atPhase(SymbolTable.scala:104)
at scala.tools.nsc.transform.ExplicitOuter$ExplicitOuterTransformer.transformUnit(ExplicitOuter.scala:497)
at scala.tools.nsc.transform.ExplicitOuter$ExplicitOuterTransformer.transformUnit(ExplicitOuter.scala:297)
at scala.tools.nsc.transform.Transform$Phase.apply(Transform.scala:31)
at scala.tools.nsc.Global$GlobalPhase$$anonfun$applyPhase$1.apply(Global.scala:272)
at scala.tools.nsc.Global$GlobalPhase$$anonfun$applyPhase$1.apply(Global.scala:272)
at scala.tools.nsc.reporters.Reporter.withSource(Reporter.scala:49)
at scala.tools.nsc.Global$GlobalPhase.applyPhase(Global.scala:272)
at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:248)
at scala.tools.nsc.Global$GlobalPhase$$anonfun$run$1.apply(Global.scala:248)
at scala.collection.Iterator$class.foreach(Iterator.scala:632)
at scala.collection.mutable.ListBuffer$$anon$1.foreach(ListBuffer.scala:305)
at scala.tools.nsc.Global$GlobalPhase.run(Global.scala:248)
at scala.tools.nsc.Global$Run.compileSources(Global.scala:729)
at scala.tools.nsc.Global$Run.compileFiles(Global.scala:800)
at scala.tools.nsc.interactive.RefinedBuildManager.update0$1(RefinedBuildManager.scala:124)
at scala.tools.nsc.interactive.RefinedBuildManager.update(RefinedBuildManager.scala:183)
at scala.tools.nsc.interactive.RefinedBuildManager.update(RefinedBuildManager.scala:93)
at scala.tools.eclipse.EclipseBuildManager.build(EclipseBuildManager.scala:119)
at scala.tools.eclipse.ScalaProject.build(ScalaProject.scala:421)
at scala.tools.eclipse.ScalaBuilder.build(ScalaBuilder.scala:87)
at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:627)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:170)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:201)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:253)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:256)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:309)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:341)
at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:140)
at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:238)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)