Here is another stack trace


!ENTRY org.scala-ide.sdt.core 4 4 2011-03-08 16:49:15.347
!MESSAGE Failure in presentation compiler
!STACK 0
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.Object.wait(Object.java:485)
at scala.tools.nsc.interactive.Response.liftedTree1$1(Response.scala:52)
at scala.tools.nsc.interactive.Response.get(Response.scala:51)
at scala.tools.eclipse.ScalaPresentationCompiler$CachedCompilerResult$$anon$3.<init>(ScalaPresentationCompiler.scala:75)
at scala.tools.eclipse.ScalaPresentationCompiler$CachedCompilerResult.create(ScalaPresentationCompiler.scala:67)
at scala.tools.eclipse.ScalaPresentationCompiler$CachedCompilerResult.create(ScalaPresentationCompiler.scala:64)
at scala.tools.eclipse.util.Cached$class.apply(Cached.scala:44)
at scala.tools.eclipse.ScalaPresentationCompiler$CachedCompilerResult.apply(ScalaPresentationCompiler.scala:64)
at scala.tools.eclipse.ScalaPresentationCompiler.withCompilerResult(ScalaPresentationCompiler.scala:99)
at scala.tools.eclipse.ScalaProject$$anonfun$withCompilerResult$1.apply(ScalaProject.scala:367)
at scala.tools.eclipse.ScalaProject$$anonfun$withCompilerResult$1.apply(ScalaProject.scala:366)
at scala.tools.eclipse.util.Cached$$anonfun$apply$1.apply$mcV$sp(Cached.scala:22)
at scala.tools.eclipse.util.Cached$$anonfun$apply$1.apply(Cached.scala:21)
at scala.tools.eclipse.util.Cached$$anonfun$apply$1.apply(Cached.scala:21)
at scala.tools.eclipse.util.Cached$class.locked(Cached.scala:83)
at scala.tools.eclipse.util.Cached$class.apply(Cached.scala:20)
at scala.tools.eclipse.ScalaProject$$anon$1.apply(ScalaProject.scala:40)
at scala.tools.eclipse.ScalaProject.withPresentationCompiler(ScalaProject.scala:362)
at scala.tools.eclipse.ScalaProject.withCompilerResult(ScalaProject.scala:366)
at scala.tools.eclipse.javaelements.ScalaCompilationUnit$class.withCompilerResult(ScalaCompilationUnit.scala:58)
at scala.tools.eclipse.javaelements.ScalaSourceFile.withCompilerResult(ScalaSourceFile.scala:40)
at scala.tools.eclipse.javaelements.ScalaSelectionEngine.select(ScalaSelectionEngine.scala:44)
at scala.tools.eclipse.javaelements.ScalaCompilationUnit$class.codeSelect(ScalaCompilationUnit.scala:144)
at scala.tools.eclipse.javaelements.ScalaSourceFile.codeSelect(ScalaSourceFile.scala:40)
at scala.tools.eclipse.javaelements.ScalaSourceFile.codeSelect(ScalaSourceFile.scala:70)
at org.eclipse.jdt.internal.core.CompilationUnit.codeSelect_aroundBody0(CompilationUnit.java:371)
at org.eclipse.jdt.internal.core.CompilationUnit.codeSelect_aroundBody1$advice(CompilationUnit.java:314)
at org.eclipse.jdt.internal.core.CompilationUnit.codeSelect(CompilationUnit.java:1)
at org.eclipse.jdt.internal.ui.text.java.hover.AbstractJavaEditorTextHover.getJavaElementsAt(AbstractJavaEditorTextHover.java:115)
at org.eclipse.jdt.internal.ui.text.java.hover.JavaSourceHover.getHoverInfo(JavaSourceHover.java:53)
at org.eclipse.jdt.internal.ui.text.java.hover.AbstractJavaEditorTextHover.getHoverInfo2(AbstractJavaEditorTextHover.java:85)
at org.eclipse.jdt.internal.ui.text.java.hover.BestMatchHover.getHoverInfo2(BestMatchHover.java:129)
at org.eclipse.jdt.internal.ui.text.java.hover.JavaEditorTextHoverProxy.getHoverInfo2(JavaEditorTextHoverProxy.java:82)
at org.eclipse.jface.text.TextViewerHoverManager$4.run(TextViewerHoverManager.java:166)

Sorry, I forgot to say I was editing a multiline comment at the time.

Jono

Can you give a try to milestones (this freeze should be fix)
update-site http://download.scala-ide.org/update-1.0.0-milestones-2.8.1.final

Installed, I'll let you know how it goes.

Cheers
Jono

Updating tickets (#1000199, #1000200, #1000201, #1000204, #1000205, #1000209, #1000210, #1000211, #1000212, #1000215, #1000217, #1000218, #1000220, #1000222, #1000226, #1000227, #1000228, #1000230, #1000231, #1000232, #1000233, #1000235, #1000236, #1000237, #1000239, #1000240, #1000241, #1000242, #1000243, #1000244, #1000248, #1000249, #1000252, #1000253, #1000254, #1000255, #1000256, #1000258, #1000259, #1000032, #1000059, #1000062, #1000163, #1000197, #1000216, #1000221, #1000224, #1000121, #1000175, #1000219, #1000251, #1000069, #1000195, #1000213, #1000223, #1000006, #1000021, #1000038, #1000048, #1000051, #1000052, #1000075, #1000103, #1000109, #1000115, #1000119, #1000156, #1000186, #1000207, #1000238, #1000262, #1000263, #380, #389, #683, #1238, #1331, #1635, #1645, #1715, #1729, #1744, #1783, #1839, #1869, #1885, #1890, #1902, #1918, #1919, #1924, #1925, #1946, #1964, #1991, #2131, #2233, #2342, #2348, #2408)

The problem has not been reported again since the last comment.
No additional info from reporter.
No reproducible test case is available.

Closing this ticket as it cannot be used to improve Scala IDE anymore.

Please reopen with additional information if you still see the problem.