Description Per Mildner 2021-12-19 07:16:32 EST

Created attachment 287708 [details]
Text file with two FF characters.

The attached text file triggers a AssertionFailedException when you click in the text editor.

The cause seems to be the form feed (FF, ^L, Page Break, Control character 12) in the text.

I originally saw this in my own editor plugin, but it happens in a plain text file as well.

The backtrace:


StyledText: topIndex was -134217720, isFixedLineHeight() = true, delta = -2147483521, content.getLineCount() = 9, clientAreaHeight = 701, oldTopIndex = 0, oldTopIndexY = 0, getVerticalScrollOffset = -2147483521, oldDelta = -2147483521, getVerticalIncrement() = 16

!ENTRY org.eclipse.ui 4 0 2021-12-19 13:12:00.691
!MESSAGE Unhandled event loop exception
!STACK 0
org.eclipse.core.runtime.AssertionFailedException: assertion failed: 
	at org.eclipse.core.runtime.Assert.isTrue(Assert.java:113)
	at org.eclipse.core.runtime.Assert.isTrue(Assert.java:99)
	at org.eclipse.jface.text.Position.<init>(Position.java:65)
	at org.eclipse.jface.text.AbstractDocument.getPositions(AbstractDocument.java:1608)
	at org.eclipse.core.internal.filebuffers.SynchronizableDocument.getPositions(SynchronizableDocument.java:246)
	at org.eclipse.jface.text.source.AnnotationModel.getRegionAnnotationIterator(AnnotationModel.java:716)
	at org.eclipse.jface.text.source.AnnotationModel.getAnnotationIterator(AnnotationModel.java:678)
	at org.eclipse.jface.text.source.AnnotationRulerColumn.doPaint(AnnotationRulerColumn.java:642)
	at org.eclipse.jface.text.source.AnnotationRulerColumn.doubleBufferPaint(AnnotationRulerColumn.java:548)
	at org.eclipse.jface.text.source.AnnotationRulerColumn.lambda$1(AnnotationRulerColumn.java:274)
	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:234)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4565)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1522)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1545)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1530)
	at org.eclipse.swt.widgets.Control.drawWidget(Control.java:1270)
	at org.eclipse.swt.widgets.Canvas.drawWidget(Canvas.java:176)
	at org.eclipse.swt.widgets.Widget.drawRect(Widget.java:776)
	at org.eclipse.swt.widgets.Canvas.drawRect(Canvas.java:170)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:6200)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSend_bool(Native Method)
	at org.eclipse.swt.internal.cocoa.NSRunLoop.runMode(NSRunLoop.java:40)
	at org.eclipse.swt.widgets.Display.sleep(Display.java:5131)
	at org.eclipse.ui.application.WorkbenchAdvisor.eventLoopIdle(WorkbenchAdvisor.java:339)
	at org.eclipse.ui.internal.ide.application.IDEWorkbenchAdvisor.eventLoopIdle(IDEWorkbenchAdvisor.java:994)
	at org.eclipse.ui.internal.Workbench$1.eventLoopIdle(Workbench.java:479)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1159)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1045)
	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: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:659)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1467)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1440)

!ENTRY org.eclipse.ui 4 0 2021-12-19 13:14:14.793
!MESSAGE Unhandled event loop exception
!STACK 0
org.eclipse.core.runtime.AssertionFailedException: assertion failed: 
	at org.eclipse.core.runtime.Assert.isTrue(Assert.java:113)
	at org.eclipse.core.runtime.Assert.isTrue(Assert.java:99)
	at org.eclipse.jface.text.Position.<init>(Position.java:65)
	at org.eclipse.jface.text.AbstractDocument.getPositions(AbstractDocument.java:1608)
	at org.eclipse.core.internal.filebuffers.SynchronizableDocument.getPositions(SynchronizableDocument.java:246)
	at org.eclipse.jface.text.source.AnnotationModel.getRegionAnnotationIterator(AnnotationModel.java:716)
	at org.eclipse.jface.text.source.AnnotationModel.getAnnotationIterator(AnnotationModel.java:678)
	at org.eclipse.jface.text.source.AnnotationRulerColumn.doPaint(AnnotationRulerColumn.java:642)
	at org.eclipse.jface.text.source.AnnotationRulerColumn.doubleBufferPaint(AnnotationRulerColumn.java:548)
	at org.eclipse.jface.text.source.AnnotationRulerColumn.lambda$1(AnnotationRulerColumn.java:274)
	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:234)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4565)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1522)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1545)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1530)
	at org.eclipse.swt.widgets.Control.drawWidget(Control.java:1270)
	at org.eclipse.swt.widgets.Canvas.drawWidget(Canvas.java:176)
	at org.eclipse.swt.widgets.Widget.drawRect(Widget.java:776)
	at org.eclipse.swt.widgets.Canvas.drawRect(Canvas.java:170)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:6200)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
	at org.eclipse.swt.widgets.Display.applicationNextEventMatchingMask(Display.java:5474)
	at org.eclipse.swt.widgets.Display.applicationProc(Display.java:5878)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
	at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:235)
	at org.eclipse.swt.widgets.Widget.mouseDownSuper(Widget.java:1146)
	at org.eclipse.swt.widgets.Tree.mouseDownSuper(Tree.java:2188)
	at org.eclipse.swt.widgets.Widget.mouseDown(Widget.java:1138)
	at org.eclipse.swt.widgets.Control.mouseDown(Control.java:2625)
	at org.eclipse.swt.widgets.Tree.mouseDown(Tree.java:2155)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:6233)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
	at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:235)
	at org.eclipse.swt.widgets.Widget.windowSendEvent(Widget.java:2160)
	at org.eclipse.swt.widgets.Shell.windowSendEvent(Shell.java:2487)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:6357)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
	at org.eclipse.swt.widgets.Display.applicationSendEvent(Display.java:5601)
	at org.eclipse.swt.widgets.Display.applicationProc(Display.java:5744)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method)
	at org.eclipse.swt.internal.cocoa.NSApplication.sendEvent(NSApplication.java:117)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3924)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1154)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1045)
	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: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:659)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1467)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1440)