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scala-ide / scala-worksheet

A Scala IDE plugin for a multi-line REPL (called worksheet)
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An exception is thrown if a worksheet is closed while is is being evaluated #57

Closed dotta closed 12 years ago

dotta commented 12 years ago

Create the following worksheet

object A {
  "before"
  synchronized {
    wait(5000)
  }
  "after"
}

Starts the evaluation and then close the editor, the following exception is reported when the evaluation terminates

ProgramExecutorService <actor> self-healing...
org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.NullPointerException)
    at org.eclipse.swt.SWT.error(SWT.java:4282)
    at org.eclipse.swt.SWT.error(SWT.java:4197)
    at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:196)
    at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:150)
    at org.eclipse.swt.widgets.Display.syncExec(Display.java:4613)
    at scala.tools.eclipse.util.SWTUtils$.syncExec(SWTUtils.scala:22)
    at org.scalaide.worksheet.editor.ScriptEditor$DefaultEditorProxy.caretOffset(ScriptEditor.scala:78)
    at org.scalaide.worksheet.runtime.IncrementalDocumentMixer.<init>(IncrementalDocumentMixer.scala:22)
    at org.scalaide.worksheet.runtime.IncrementalDocumentMixer$.apply(IncrementalDocumentMixer.scala:11)
    at org.scalaide.worksheet.runtime.ProgramExecutorService$$anonfun$act$1$$anonfun$apply$1.applyOrElse(ProgramExecutorService.scala:131)
    at scala.runtime.AbstractPartialFunction$mcVL$sp.apply$mcVL$sp(AbstractPartialFunction.scala:37)
    at scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:37)
    at scala.runtime.AbstractPartialFunction$mcVL$sp.apply(AbstractPartialFunction.scala:29)
    at scala.actors.ReactorTask.run(ReactorTask.scala:31)
    at scala.actors.ReactorTask.compute(ReactorTask.scala:63)
    at scala.concurrent.forkjoin.RecursiveAction.exec(RecursiveAction.java:160)
    at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:262)
    at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:975)
    at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1478)
    at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:104)
Caused by: java.lang.NullPointerException
    at org.scalaide.worksheet.editor.ScriptEditor$DefaultEditorProxy$$anonfun$caretOffset$1.apply$mcV$sp(ScriptEditor.scala:79)
    at scala.tools.eclipse.util.SWTUtils$$anon$11.run(SWTUtils.scala:23)
    at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
    at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)
    at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3938)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3615)
    at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2701)
    at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2665)
    at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2499)
    at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:679)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:668)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
dotta commented 12 years ago

This and #58 are intimately related.