Community
Participate
Working Groups
record MyNumber(int someInt) implements MyInterface {} MyInterface mi = ... switch(mi) { case MyNumber mn && mn. -> doSomething(); } If you request content assist after 'mn.' you will get an error popup dialog. The error log will show a warning: The 'org.eclipse.jdt.ui.postfixCompletion' proposal computer from the 'org.eclipse.jdt.ui' plug-in did not complete normally. The extension has thrown a runtime exception. java.lang.ClassCastException: class org.eclipse.jdt.internal.compiler.ast.Argument cannot be cast to class org.eclipse.jdt.internal.compiler.ast.LambdaExpression (org.eclipse.jdt.internal.compiler.ast.Argument and org.eclipse.jdt.internal.compiler.ast.LambdaExpression are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @631192fb) at org.eclipse.jdt.internal.compiler.parser.Parser.consumeLambdaExpression(Parser.java:9103) at org.eclipse.jdt.internal.compiler.parser.Parser.consumeRule(Parser.java:7910) at org.eclipse.jdt.internal.compiler.parser.Parser.parse(Parser.java:13035) at org.eclipse.jdt.internal.compiler.parser.Parser.parse(Parser.java:13290) at org.eclipse.jdt.internal.compiler.parser.Parser.parse(Parser.java:13247) at org.eclipse.jdt.internal.compiler.parser.Parser.dietParse(Parser.java:11633) at org.eclipse.jdt.internal.compiler.Compiler.accept(Compiler.java:337) at org.eclipse.jdt.core.dom.CompilationUnitResolver.accept(CompilationUnitResolver.java:186) at org.eclipse.jdt.core.dom.CompilationUnitResolver.accept(CompilationUnitResolver.java:181) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:342) at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:276) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.findImport(CompilationUnitScope.java:551) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.findSingleImport(CompilationUnitScope.java:623) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.faultInImports(CompilationUnitScope.java:452) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.faultInTypes(CompilationUnitScope.java:525) at org.eclipse.jdt.core.dom.CompilationUnitResolver.resolve(CompilationUnitResolver.java:1233) at org.eclipse.jdt.core.dom.CompilationUnitResolver.resolve(CompilationUnitResolver.java:712) at org.eclipse.jdt.core.dom.ASTParser.internalCreateAST(ASTParser.java:1253) at org.eclipse.jdt.core.dom.ASTParser.createAST(ASTParser.java:868) at org.eclipse.jdt.internal.ui.text.java.PostfixCompletionProposalComputer.updateTemplateEngine(PostfixCompletionProposalComputer.java:153) at org.eclipse.jdt.internal.ui.text.java.PostfixCompletionProposalComputer.analyzeCoreContext(PostfixCompletionProposalComputer.java:121) at org.eclipse.jdt.internal.ui.text.java.PostfixCompletionProposalComputer.computeCompletionEngine(PostfixCompletionProposalComputer.java:110) at org.eclipse.jdt.internal.ui.text.java.AbstractTemplateCompletionProposalComputer.computeCompletionProposals(AbstractTemplateCompletionProposalComputer.java:71) 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$0(ContentAssistant.java:2022) at java.base/java.util.Collections$SingletonSet.forEach(Collections.java:4872) at org.eclipse.jface.text.contentassist.ContentAssistant$2.run(ContentAssistant.java:2021) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45) at org.eclipse.jface.text.contentassist.ContentAssistant.computeCompletionProposals(ContentAssistant.java:2018) at org.eclipse.jface.text.contentassist.CompletionProposalPopup.computeProposals(CompletionProposalPopup.java:577) at org.eclipse.jface.text.contentassist.CompletionProposalPopup.lambda$3(CompletionProposalPopup.java:1629) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:74) at org.eclipse.jface.text.contentassist.CompletionProposalPopup.incrementalComplete(CompletionProposalPopup.java:1624) at org.eclipse.jface.text.contentassist.ContentAssistant.showPossibleCompletions(ContentAssistant.java:1831) at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor$AdaptedSourceViewer.doOperation(CompilationUnitEditor.java:188) at org.eclipse.ui.texteditor.ContentAssistAction.lambda$0(ContentAssistAction.java:85) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:74) at org.eclipse.ui.texteditor.ContentAssistAction.run(ContentAssistAction.java:84) at org.eclipse.ui.texteditor.RetargetTextEditorAction.run(RetargetTextEditorAction.java:232) at org.eclipse.jface.action.Action.runWithEvent(Action.java:474) at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:121) at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:97) at jdk.internal.reflect.GeneratedMethodAccessor74.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:567) at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58) at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:317) at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:251) at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:173) at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:156) at org.eclipse.core.commands.Command.executeWithChecks(Command.java:488) at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:487) at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:213) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.executeCommand(KeyBindingDispatcher.java:308) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.press(KeyBindingDispatcher.java:580) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.processKeyEvent(KeyBindingDispatcher.java:647) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.filterKeySequenceBindings(KeyBindingDispatcher.java:439) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher$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:1059) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1084) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1069) at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1111) at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1107) at org.eclipse.swt.widgets.Widget.wmChar(Widget.java:1536) at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:4875) at org.eclipse.swt.widgets.Canvas.WM_CHAR(Canvas.java:345) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4753) at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:340) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4958) at org.eclipse.swt.internal.win32.OS.CallWindowProc(Native Method) at org.eclipse.swt.internal.BidiUtil.windowProc(BidiUtil.java:648) 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:1150) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1041) 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:136) 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:78) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:567) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596) at org.eclipse.equinox.launcher.Main.run(Main.java:1467) Using: Version: 2021-09 (4.21) Build id: I20210906-0500 Eclipse JDT (Java Development Tools) Patch with Java 17 support for 2021-09 development stream 1.2.200.v20210914-1442_BETA_JAVA17 org.eclipse.jdt.java17patch.feature.group Eclipse.org
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.
