Community
Participate
Working Groups
Eclipse EE 2019-06-M3 (Windows 10) I'm working on an old codebase and I was adding a deprecation: /** * Parses a content type object from a string. * @param charSequence The character sequence representation of the content type. * @return A new content type object parsed from the string. * @throws ArgumentSyntaxException Thrown if the string is not a syntactically correct content type. * @deprecated in favor of # */ When I typed the `#` for the deprecation, content assist produced the following error: eclipse.buildId=4.12.0.I20190522-1800 java.version=11 java.vendor=Oracle Corporation BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US Framework arguments: -product org.eclipse.epp.package.jee.product Command-line arguments: -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.jee.product org.eclipse.jdt.ui Warning Wed Jun 05 09:06:13 PDT 2019 The 'org.eclipse.jdt.ui.org.eclipse.jdt.ui.javaCompletionProposalComputer.chain' proposal computer from the 'org.eclipse.jdt.ui' plug-in did not complete normally. The extension has thrown a runtime exception. java.lang.NullPointerException at java.base/java.lang.String.<init>(String.java:251) at java.base/java.lang.String.valueOf(String.java:2965) at org.eclipse.jdt.internal.ui.text.java.ChainCompletionProposalComputer.matchesExpectedPrefix(ChainCompletionProposalComputer.java:145) at org.eclipse.jdt.internal.ui.text.java.ChainCompletionProposalComputer.findEntrypoints(ChainCompletionProposalComputer.java:136) at org.eclipse.jdt.internal.ui.text.java.ChainCompletionProposalComputer.computeCompletionProposals(ChainCompletionProposalComputer.java:77) at org.eclipse.jdt.internal.ui.text.java.CompletionProposalComputerDescriptor.computeCompletionProposals(CompletionProposalComputerDescriptor.java:336) at org.eclipse.jdt.internal.ui.text.java.CompletionProposalCategory.computeCompletionProposals(CompletionProposalCategory.java:340) at org.eclipse.jdt.internal.ui.text.java.ContentAssistProcessor.collectProposals(ContentAssistProcessor.java:334) at org.eclipse.jdt.internal.ui.text.java.ContentAssistProcessor.computeCompletionProposals(ContentAssistProcessor.java:291) at org.eclipse.jface.text.contentassist.ContentAssistant$2.lambda$0(ContentAssistant.java:2014) at java.base/java.util.Collections$SingletonSet.forEach(Collections.java:4795) at org.eclipse.jface.text.contentassist.ContentAssistant$2.run(ContentAssistant.java:2013) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45) at org.eclipse.jface.text.contentassist.ContentAssistant.computeCompletionProposals(ContentAssistant.java:2010) at org.eclipse.jface.text.contentassist.CompletionProposalPopup.computeProposals(CompletionProposalPopup.java:575) at org.eclipse.jface.text.contentassist.CompletionProposalPopup.lambda$0(CompletionProposalPopup.java:505) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:72) at org.eclipse.jface.text.contentassist.CompletionProposalPopup.showProposals(CompletionProposalPopup.java:500) at org.eclipse.jface.text.contentassist.ContentAssistant$AutoAssistListener.lambda$0(ContentAssistant.java:380) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:40) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:185) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3919) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3550) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1173) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1062) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155) at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:635) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:559) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:155) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:400) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:660) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:597) at org.eclipse.equinox.launcher.Main.run(Main.java:1468)
Now it seems that Content Assist is pausing and then generating errors with almost everything I do: eclipse.buildId=4.12.0.I20190522-1800 java.version=11 java.vendor=Oracle Corporation BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US Framework arguments: -product org.eclipse.epp.package.jee.product Command-line arguments: -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.jee.product org.eclipse.jdt.core Error Wed Jun 05 10:03:28 PDT 2019 Could not retrieve declared methods java.lang.NullPointerException at org.eclipse.jdt.internal.compiler.lookup.SourceTypeBinding.resolveTypesFor(SourceTypeBinding.java:1880) at org.eclipse.jdt.internal.compiler.lookup.SourceTypeBinding.methods(SourceTypeBinding.java:1571) at org.eclipse.jdt.internal.compiler.lookup.ReferenceBinding.availableMethods(ReferenceBinding.java:248) at org.eclipse.jdt.core.dom.TypeBinding.getDeclaredMethods(TypeBinding.java:292) at org.eclipse.jdt.internal.ui.text.TypeBindingAnalyzer.findFieldsAndMethods(TypeBindingAnalyzer.java:102) at org.eclipse.jdt.internal.ui.text.TypeBindingAnalyzer.findVisibleInstanceFieldsAndRelevantInstanceMethods(TypeBindingAnalyzer.java:86) at org.eclipse.jdt.internal.ui.text.ChainFinder.findAllFieldsAndMethods(ChainFinder.java:146) at org.eclipse.jdt.internal.ui.text.ChainFinder.searchDeeper(ChainFinder.java:132) at org.eclipse.jdt.internal.ui.text.ChainFinder.searchChainsForExpectedType(ChainFinder.java:81) at org.eclipse.jdt.internal.ui.text.ChainFinder.startChainSearch(ChainFinder.java:58) at org.eclipse.jdt.internal.ui.text.java.ChainCompletionProposalComputer.lambda$0(ChainCompletionProposalComputer.java:158) at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at java.base/java.lang.Thread.run(Thread.java:834) … eclipse.buildId=4.12.0.I20190522-1800 java.version=11 java.vendor=Oracle Corporation BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US Framework arguments: -product org.eclipse.epp.package.jee.product Command-line arguments: -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.jee.product org.eclipse.jdt.core Error Wed Jun 05 10:03:28 PDT 2019 Could not retrieve declared fields java.lang.NullPointerException
Note that I was using content assist in Javadoc comments of another class trying to link to dependencies of the class `com.globalmentor.html.spec.HTML` which is available via Maven Central at the coordinates `com.globalmentor:globalmentor-html-spec:0.6.0`. For example: /** * {@inheritDoc} * @implSpec This version returns the media type <code>text/html</code> for all pages. * @see HTML# */ @Override public FooBar doFoo() … I was using content assist on the `HTML#` part above.
(In reply to Garret Wilson from comment #0) > org.eclipse.jdt.internal.ui.text.java.ChainCompletionProposalComputer. > matchesExpectedPrefix(ChainCompletionProposalComputer.java:145) Chain completion was never supposed to be automatically enabled. In fact this feature has been withdrawn from 4.12 due to known problems. Please go to Preferences > Java > Editor > Content Assist > Advanced and disable Chain Proposals.
Just to confirm the name, that would be "Chain Template Proposals" I am to disable?
(In reply to Garret Wilson from comment #4) > Just to confirm the name, that would be "Chain Template Proposals" I am to > disable? yep. See linked bug 547833.
Thanks. That seems to have fixed this problem.
Note that I certainly did not go enable any special content assist settings. And I didn't even "upgrade" Eclipse: I merely unzipped the Eclipse EE 2019-06 M3 distribution (although I did use an existing workspace). So you might want to check if this thing is getting enabled erroneously; someone mentioned in one of the linked bugs that it shouldn't be turned on by default. Then again there have been problems in the past with some Eclipse builds turning off content assist altogether; see Bug 542925. Maybe when I told it to "restore defaults" back in December 2018 it turned this on. I don't know; that's only a conjecture.
(In reply to Garret Wilson from comment #7) > Note that I certainly did not go enable any special content assist settings. > And I didn't even "upgrade" Eclipse: I merely unzipped the Eclipse EE > 2019-06 M3 distribution (although I did use an existing workspace). So you > might want to check if this thing is getting enabled erroneously; someone > mentioned in one of the linked bugs that it shouldn't be turned on by > default. > > Then again there have been problems in the past with some Eclipse builds > turning off content assist altogether; see Bug 542925. Maybe when I told it > to "restore defaults" back in December 2018 it turned this on. I don't know; > that's only a conjecture. That is not your fault, that is bug 547833 comment 9. This must be addressed in bug 544108, for now the feature is disabled.
This bug hasn't had any activity in quite some time. Maybe the problem got resolved, was a duplicate of something else, or became less pressing for some reason - or maybe it's still relevant but just hasn't been looked at yet. If you have further information on the current state of the bug, please add it. The information can be, for example, that the problem still occurs, that you still want the feature, that more information is needed, or that the bug is (for whatever reason) no longer relevant. -- The automated Eclipse Genie.
