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I'm getting a NPE in Embedded CDT, when trying to open one of the Properties window (the C/C++ Build -> Settings) !ENTRY org.eclipse.cdt.ui 4 4 2021-01-11 17:59:49.267 !MESSAGE Internal error !STACK 0 java.lang.NullPointerException: Cannot invoke "org.eclipse.swt.internal.cocoa.NSWindow.windowNumber()" because "window" is null at org.eclipse.swt.widgets.Control.internal_new_GC(Control.java:2163) at org.eclipse.swt.graphics.GC.<init>(GC.java:262) at org.eclipse.swt.graphics.GC.<init>(GC.java:223) at org.eclipse.swt.widgets.Table.setScrollWidth(Table.java:2885) at org.eclipse.swt.widgets.Table.setScrollWidth(Table.java:2855) at org.eclipse.swt.widgets.Table.setRedraw(Table.java:2827) at org.eclipse.jface.viewers.AbstractTableViewer.inputChanged(AbstractTableViewer.java:574) at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:282) at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1634) at org.eclipse.cdt.ui.newui.ErrorParsTab.initMapParsers(ErrorParsTab.java:264) at org.eclipse.cdt.ui.newui.ErrorParsTab.performApply(ErrorParsTab.java:539) at org.eclipse.cdt.ui.newui.AbstractCPropertyTab.handleTabEvent(AbstractCPropertyTab.java:576) at org.eclipse.cdt.ui.newui.AbstractPage.forEach(AbstractPage.java:1100) at org.eclipse.cdt.ui.newui.AbstractPage$5.run(AbstractPage.java:687) at org.eclipse.ui.actions.WorkspaceModifyDelegatingOperation.execute(WorkspaceModifyDelegatingOperation.java:71) at org.eclipse.ui.actions.WorkspaceModifyOperation.lambda$0(WorkspaceModifyOperation.java:110) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2292) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2317) at org.eclipse.ui.actions.WorkspaceModifyOperation.run(WorkspaceModifyOperation.java:131) at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:436) at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:352) at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:468) at org.eclipse.ui.internal.progress.ProgressManager$RunnableWithStatus.run(ProgressManager.java:1117) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:74) at org.eclipse.ui.internal.progress.ProgressManager.lambda$27(ProgressManager.java:996) at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:236) at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:133) at org.eclipse.swt.widgets.Display.syncExec(Display.java:5050) at org.eclipse.ui.internal.progress.ProgressManager.runInUI(ProgressManager.java:996) at org.eclipse.cdt.ui.newui.AbstractPage.performSave(AbstractPage.java:706) at org.eclipse.cdt.ui.newui.AbstractPage.performApply(AbstractPage.java:554) at org.eclipse.jface.preference.PreferencePage.lambda$1(PreferencePage.java:289) at org.eclipse.swt.events.SelectionListener$1.widgetSelected(SelectionListener.java:84) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:252) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4443) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1512) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1535) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1520) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1324) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4229) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3839) at org.eclipse.jface.window.Window.runEventLoop(Window.java:823) at org.eclipse.jface.window.Window.open(Window.java:799) at org.eclipse.ui.dialogs.PropertyDialogAction.run(PropertyDialogAction.java:153) at org.eclipse.jface.action.Action.runWithEvent(Action.java:474) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:580) at org.eclipse.jface.action.ActionContributionItem.lambda$4(ActionContributionItem.java:414) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4443) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1512) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1535) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1520) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1324) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4229) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3839) 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:653) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590) at org.eclipse.equinox.launcher.Main.run(Main.java:1461) This does happen only after using Eclipse for a while, so it might be related to depleted memory/resources.
In certain situation the bug also occurs right after starting Eclipse, so the depleted resources probably are not internal to Eclipse. Without being able to change the CDT settings, Eclipse is hardly usable.
Created attachment 285291 [details] Screenshot with error
