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I can not stop the the following content assist errors when pressing "." in the Java editor despite the suggestions on what to do in the alert: The 'API Tools Javadoc Proposals' proposal computer from the 'org.eclipse.pde.api.tools.ui' plug-in did not complete normally. The extension has thrown a runtime exception. To avoid this message, disable the 'org.eclipse.pde.api.tools.ui' plug-in or disable the 'API Tools Proposals' category on the content assist preference page. I've followed the instruction listed in the error, however the problem still exists. Here is the stack trace: java.lang.IllegalArgumentException at org.eclipse.jdt.core.dom.ASTParser.<init>(ASTParser.java:226) at org.eclipse.jdt.core.dom.ASTParser.newParser(ASTParser.java:125) at org.eclipse.pde.api.tools.ui.internal.completion.APIToolsJavadocCompletionProposalComputer.sessionStarted(APIToolsJavadocCompletionProposalComputer.java:415) at org.eclipse.jdt.internal.ui.text.java.CompletionProposalComputerDescriptor.sessionStarted(CompletionProposalComputerDescriptor.java:423) at org.eclipse.jdt.internal.ui.text.java.CompletionProposalCategory.sessionStarted(CompletionProposalCategory.java:384) at org.eclipse.jdt.internal.ui.text.java.ContentAssistProcessor$CompletionListener.assistSessionStarted(ContentAssistProcessor.java:119) at org.eclipse.jface.text.contentassist.ContentAssistant.fireSessionBeginEvent(ContentAssistant.java:2221) at org.eclipse.jface.text.contentassist.ContentAssistant.prepareToShowCompletions(ContentAssistant.java:1696) at org.eclipse.jface.text.contentassist.ContentAssistant.access$6(ContentAssistant.java:1687) at org.eclipse.jface.text.contentassist.ContentAssistant$2.run(ContentAssistant.java:376) 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:4145) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3762) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1113) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:997) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:140) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:611) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:567) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124) 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:354) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:636) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591) at org.eclipse.equinox.launcher.Main.run(Main.java:1450)
*** Bug 440429 has been marked as a duplicate of this bug. ***
APIToolsJavadocCompletionProposalComputer has public void sessionStarted() { fParser = ASTParser.newParser(AST.JLS8); fErrorMessage = null; & ASTParser has ASTParser(int level) { switch(level) { case AST.JLS2_INTERNAL: case AST.JLS3_INTERNAL: case AST.JLS4_INTERNAL: case AST.JLS8: break; default: throw new IllegalArgumentException(); based on this default code will not be executed. This is fixed in 4.5
Also I was unable to recreate on 4.5
Works for me with 4.5 M1 eclipse-SDK-I20140806-2000-win32
