Imports, Code Navigation mysteriously stop working in scripts Follow

Has anyone experienced this? I've got a perfectly fine Groovy script that I authored in JetGroovy that runs, works fine and is functioning normally. After some time and changes elsewhere in the system, suddenly the imports are greyed out (unused import warnings) and code navigation (cntl-click on variables) fails and Groovy can't find my variables even though my script hasn't changed.

Looking in the logs, I do see this exception:

2008-02-22 17:31:18,630 ERROR - lang.psi.impl.GroovyPsiManager - Type is invalid: PsiType:List
java.lang.Throwable
at com.intellij.openapi.diagnostic.Logger.error(Logger.java:48)
at org.jetbrains.plugins.groovy.lang.psi.impl.GroovyPsiManager.getType(GroovyPsiManager.java:312)
at org.jetbrains.plugins.groovy.lang.psi.impl.statements.expressions.GrReferenceExpressionImpl.getType(GrReferenceExpressionImpl.java:313)
at org.jetbrains.plugins.groovy.annotator.GroovyAnnotator.checkReferenceExpression(GroovyAnnotator.java:684)
at org.jetbrains.plugins.groovy.annotator.GroovyAnnotator.annotate(GroovyAnnotator.java:102)
at com.intellij.codeInsight.daemon.impl.analysis.HighlightVisitorImpl.visitElement(HighlightVisitorImpl.java:483)
at com.intellij.extapi.psi.PsiElementBase.accept(PsiElementBase.java:129)
at com.intellij.codeInsight.daemon.impl.analysis.HighlightVisitorImpl.visit(HighlightVisitorImpl.java:149)
at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.a(GeneralHighlightingPass.java:196)
at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.access$600(GeneralHighlightingPass.java:107)
at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass$1.run(GeneralHighlightingPass.java:22)
at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.collectInformationWithProgress(GeneralHighlightingPass.java:123)
at com.intellij.codeInsight.daemon.impl.ProgressableTextEditorHighlightingPass.doCollectInformation(ProgressableTextEditorHighlightingPass.java:9)
at com.intellij.codeHighlighting.TextEditorHighlightingPass.collectInformation(TextEditorHighlightingPass.java:50)
at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass$1$1.run(PassExecutorService.java:8)
at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:7)
at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass$1.run(PassExecutorService.java:1)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:13)
at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.run(PassExecutorService.java:10)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)





and also this one:



com.intellij.psi.PsiInvalidElementAccessException: Element: class org.jetbrains.plugins.groovy.lang.psi.impl.toplevel.imports.GrImportStatementImpl
at com.intellij.extapi.psi.PsiElementBase.getContainingFile(PsiElementBase.java:103)
at org.jetbrains.plugins.groovy.codeInspection.GroovyImportsTracker.registerImportUsed(GroovyImportsTracker.java:36)
at org.jetbrains.plugins.groovy.annotator.GroovyAnnotator.registerUsedImport(GroovyAnnotator.java:794)
at org.jetbrains.plugins.groovy.annotator.GroovyAnnotator.checkReferenceElement(GroovyAnnotator.java:832)
at org.jetbrains.plugins.groovy.annotator.GroovyAnnotator.annotate(GroovyAnnotator.java:100)
at com.intellij.codeInsight.daemon.impl.analysis.HighlightVisitorImpl.visitElement(HighlightVisitorImpl.java:483)
at com.intellij.extapi.psi.PsiElementBase.accept(PsiElementBase.java:129)
at com.intellij.codeInsight.daemon.impl.analysis.HighlightVisitorImpl.visit(HighlightVisitorImpl.java:149)
at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.a(GeneralHighlightingPass.java:196)
at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.access$600(GeneralHighlightingPass.java:107)
at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass$1.run(GeneralHighlightingPass.java:22)
at com.intellij.codeInsight.daemon.impl.RefCountHolder.analyzeAndStoreReferences(RefCountHolder.java:79)
at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.collectInformationWithProgress(GeneralHighlightingPass.java:241)
at com.intellij.codeInsight.daemon.impl.ProgressableTextEditorHighlightingPass.doCollectInformation(ProgressableTextEditorHighlightingPass.java:9)
at com.intellij.codeHighlighting.TextEditorHighlightingPass.collectInformation(TextEditorHighlightingPass.java:50)
at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass$1$1.run(PassExecutorService.java:8)
at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:7)
at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass$1.run(PassExecutorService.java:1)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:13)
at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.run(PassExecutorService.java:10)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)