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I edited in the compare editor and ended up in this weird state (screenshot to follow). Found this stack trace in my .log six times: java.lang.IllegalStateException at org.eclipse.jface.text.projection.ProjectionMapping.toImageLine(ProjectionMapping.java:479) at org.eclipse.jface.text.TextViewer.modelLine2WidgetLine(TextViewer.java:4869) at org.eclipse.jface.text.JFaceTextUtil.modelLineToWidgetLine(JFaceTextUtil.java:215) at org.eclipse.jface.internal.text.source.DiffPainter.paintLine(DiffPainter.java:220) at org.eclipse.jface.internal.text.source.DiffPainter.paint(DiffPainter.java:158) at org.eclipse.jface.text.source.LineNumberChangeRulerColumn.doPaint(LineNumberChangeRulerColumn.java:190) at org.eclipse.jface.text.source.LineNumberRulerColumn.doubleBufferPaint(LineNumberRulerColumn.java:612) at org.eclipse.jface.text.source.LineNumberRulerColumn.redraw(LineNumberRulerColumn.java:764) at org.eclipse.jface.text.source.LineNumberRulerColumn$InternalListener.viewportChanged(LineNumberRulerColumn.java:72) at org.eclipse.jface.text.TextViewer.updateViewportListeners(TextViewer.java:2914) at org.eclipse.jface.text.TextViewer$ViewportGuard.widgetSelected(TextViewer.java:301) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:227) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:962) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:947) at org.eclipse.swt.widgets.ScrollBar.wmScrollChild(ScrollBar.java:899) at org.eclipse.swt.widgets.Scrollable.wmScroll(Scrollable.java:403) at org.eclipse.swt.widgets.Scrollable.WM_VSCROLL(Scrollable.java:350) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3744) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4355) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2257) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:77) at org.eclipse.swt.widgets.Composite.WM_SYSCOMMAND(Composite.java:1425) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3738) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4342) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2257) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:77) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3752) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4355) at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method) at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2262) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3282) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2365) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2329) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2204) at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
Created attachment 67533 [details] screenshot Oh, I had a Java editor open on the same file, and it ended up in a weird state too.
BTW, there was no real change where the compare editor showed a change. I don't have time to try to reproduce this right now, but we can try tomorrow.
If both the Compare editor and Java editor where showing the behavior, then it sounds like a potential problem in the file buffer. Moving to Platform/Text for comment.
*** This bug has been marked as a duplicate of bug 142715 ***
