Static completion error on 4.21

[gayanper]

java.util.concurrent.ExecutionException: java.lang.NullPointerException: Cannot invoke "org.eclipse.jdt.internal.compiler.lookup.ClassScope.compilerOptions()" because "this.scope" is null
	at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122)
	at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:205)
	at org.gap.eclipse.jdt.types.StaticMemberFinder.performSearch(StaticMemberFinder.java:254)
	at org.gap.eclipse.jdt.types.StaticMemberFinder.find(StaticMemberFinder.java:65)
	at org.gap.eclipse.jdt.types.SmartStaticProposalComputer.completionList(SmartStaticProposalComputer.java:43)
	at org.gap.eclipse.jdt.types.SmartStaticProposalComputer.computeSmartCompletionProposals(SmartStaticProposalComputer.java:33)
	at org.gap.eclipse.jdt.types.AbstractSmartProposalComputer.computeCompletionProposals(AbstractSmartProposalComputer.java:171)
	at org.eclipse.jdt.internal.ui.text.java.CompletionProposalComputerDescriptor.computeCompletionProposals(CompletionProposalComputerDescriptor.java:348)
	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:333)
	at org.eclipse.jdt.internal.ui.text.java.ContentAssistProcessor.computeCompletionProposals(ContentAssistProcessor.java:289)
	at org.eclipse.jface.text.contentassist.ContentAssistant$2.lambda$0(ContentAssistant.java:2020)
	at java.base/java.util.Collections$SingletonSet.forEach(Collections.java:4872)
	at org.eclipse.jface.text.contentassist.ContentAssistant$2.run(ContentAssistant.java:2019)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.jface.text.contentassist.ContentAssistant.computeCompletionProposals(ContentAssistant.java:2016)
	at org.eclipse.jface.text.contentassist.CompletionProposalPopup.computeProposals(CompletionProposalPopup.java:577)
	at org.eclipse.jface.text.contentassist.CompletionProposalPopup.handleRepeatedInvocation(CompletionProposalPopup.java:559)
	at org.eclipse.jface.text.contentassist.CompletionProposalPopup.incrementalComplete(CompletionProposalPopup.java:1610)
	at org.eclipse.jface.text.contentassist.ContentAssistant.showPossibleCompletions(ContentAssistant.java:1829)
	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor$AdaptedSourceViewer.doOperation(CompilationUnitEditor.java:188)
	at org.eclipse.ui.texteditor.ContentAssistAction.lambda$0(ContentAssistAction.java:85)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:74)
	at org.eclipse.ui.texteditor.ContentAssistAction.run(ContentAssistAction.java:84)
	at org.eclipse.ui.texteditor.RetargetTextEditorAction.run(RetargetTextEditorAction.java:232)
	at org.eclipse.jface.action.Action.runWithEvent(Action.java:474)
	at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:121)
	at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:97)
	at jdk.internal.reflect.GeneratedMethodAccessor92.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:319)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:253)
	at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:173)
	at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:156)
	at org.eclipse.core.commands.Command.executeWithChecks(Command.java:488)
	at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:487)
	at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:213)
	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.executeCommand(KeyBindingDispatcher.java:308)
	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.press(KeyBindingDispatcher.java:584)
	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.processKeyEvent(KeyBindingDispatcher.java:653)
	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.filterKeySequenceBindings(KeyBindingDispatcher.java:443)
	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher$KeyDownFilter.handleEvent(KeyBindingDispatcher.java:96)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
	at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1270)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1042)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1067)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1052)
	at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1094)
	at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1090)
	at org.eclipse.swt.widgets.Widget.wmChar(Widget.java:1519)
	at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:4882)
	at org.eclipse.swt.widgets.Canvas.WM_CHAR(Canvas.java:345)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:4760)
	at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:340)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:4930)
	at org.eclipse.swt.internal.win32.OS.DispatchMessage(Native Method)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3624)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1157)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1046)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)
	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:644)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:551)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:156)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:152)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401)
	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:64)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:654)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1462)
Caused by: java.lang.NullPointerException: Cannot invoke "org.eclipse.jdt.internal.compiler.lookup.ClassScope.compilerOptions()" because "this.scope" is null
	at org.eclipse.jdt.internal.compiler.lookup.SourceTypeBinding.resolveTypeFor(SourceTypeBinding.java:2544)
	at org.eclipse.jdt.internal.compiler.lookup.SourceTypeBinding.getField(SourceTypeBinding.java:1811)
	at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.convertMemberValue(BinaryTypeBinding.java:151)
	at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.createAnnotation(BinaryTypeBinding.java:199)
	at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.createAnnotations(BinaryTypeBinding.java:212)
	at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.createMethod(BinaryTypeBinding.java:1064)
	at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.createMethods(BinaryTypeBinding.java:1125)
	at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.cachePartsFrom(BinaryTypeBinding.java:613)
	at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.createBinaryTypeFrom(LookupEnvironment.java:1055)
	at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.createBinaryTypeFrom(LookupEnvironment.java:1036)
	at org.eclipse.jdt.internal.core.search.matching.MatchLocator.accept(MatchLocator.java:360)
	at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:257)
	at org.eclipse.jdt.internal.compiler.lookup.UnresolvedReferenceBinding.resolve(UnresolvedReferenceBinding.java:114)
	at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.resolveType(BinaryTypeBinding.java:248)
	at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.resolveTypeFor(BinaryTypeBinding.java:1798)
	at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.availableFields(BinaryTypeBinding.java:372)
	at org.eclipse.jdt.internal.core.search.matching.ClassFileMatchLocator.locateMatches(ClassFileMatchLocator.java:246)
	at org.eclipse.jdt.internal.core.search.matching.MatchLocator.process(MatchLocator.java:1976)
	at org.eclipse.jdt.internal.core.search.matching.MatchLocator.locateMatches(MatchLocator.java:1345)
	at org.eclipse.jdt.internal.core.search.matching.MatchLocator.locateMatches(MatchLocator.java:1382)
	at org.eclipse.jdt.internal.core.search.matching.MatchLocator.locateMatches(MatchLocator.java:1524)
	at org.eclipse.jdt.internal.core.search.JavaSearchParticipant.locateMatches(JavaSearchParticipant.java:135)
	at org.gap.eclipse.jdt.types.FilteredSearchParticipant.locateMatches(FilteredSearchParticipant.java:50)
	at org.gap.eclipse.jdt.types.CachedSearchParticipant.locateMatches(CachedSearchParticipant.java:62)
	at org.eclipse.jdt.internal.core.search.BasicSearchEngine.findMatches(BasicSearchEngine.java:250)
	at org.eclipse.jdt.internal.core.search.BasicSearchEngine.search(BasicSearchEngine.java:601)
	at org.eclipse.jdt.core.search.SearchEngine.search(SearchEngine.java:670)
	at org.gap.eclipse.jdt.types.StaticMemberFinder.lambda$6(StaticMemberFinder.java:225)
	at java.base/java.util.concurrent.Executors$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:1130)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
	at java.base/java.lang.Thread.run(Thread.java:832)