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I was debugging a new Eclipse editor. I selected a variable in the text view of the debugger and selected 'Inspect' from the context menu. The following walkback occurred in the debug target: java.lang.ClassNotFoundException: org.eclipse.ui.part.CodeSnippet_1 at org.eclipse.core.internal.boot.DelegatingURLClassLoader.loadClass (DelegatingURLClassLoader.java:755) at java.lang.ClassLoader.loadClass(ClassLoader.java:257) at java.lang.Class.forName1(Native Method) at java.lang.Class.forName(Class.java:134) at org.eclipse.ui.part.MultiPageSelectionProvider.getSelection (MultiPageSelectionProvider.java:75) at org.eclipse.ui.views.tasklist.TaskList.partActivated (TaskList.java:630) at org.eclipse.ui.views.tasklist.TaskList$1.partActivated (TaskList.java:134) at org.eclipse.ui.internal.PartListenerList$1.run (PartListenerList.java:37) at org.eclipse.core.internal.runtime.InternalPlatform.run (InternalPlatform.java:821) at org.eclipse.core.runtime.Platform.run(Platform.java:395) at org.eclipse.ui.internal.PartListenerList.firePartActivated (PartListenerList.java:35) at org.eclipse.ui.internal.WorkbenchPage.firePartActivated (WorkbenchPage.java:637) at org.eclipse.ui.internal.WorkbenchPage.setActivePart (WorkbenchPage.java:1427) at org.eclipse.ui.internal.WorkbenchPage.requestActivation (WorkbenchPage.java:1231) at org.eclipse.ui.internal.PartPane.requestActivation(PartPane.java:222) at org.eclipse.ui.internal.EditorPane.requestActivation (EditorPane.java:112) at org.eclipse.ui.internal.PartPane.handleEvent(PartPane.java:181) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:74) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:839) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:825) at org.eclipse.swt.widgets.Shell.setActiveControl(Shell.java:689) at org.eclipse.swt.widgets.Shell.WM_MOUSEACTIVATE(Shell.java:979) at org.eclipse.swt.widgets.Control.windowProc(Control.java:2627) at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1116) at org.eclipse.swt.widgets.Display.windowProc(Display.java:1794) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:1155) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:71) at org.eclipse.swt.widgets.Control.windowProc(Control.java:2662) at org.eclipse.swt.widgets.Display.windowProc(Display.java:1794) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:1155) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:71) at org.eclipse.swt.widgets.Control.windowProc(Control.java:2662) at org.eclipse.swt.widgets.Display.windowProc(Display.java:1794) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:1155) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:71) at org.eclipse.swt.widgets.Control.windowProc(Control.java:2662) at org.eclipse.swt.widgets.Display.windowProc(Display.java:1794) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:1155) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:71) at org.eclipse.swt.widgets.Control.windowProc(Control.java:2662) at org.eclipse.swt.widgets.Display.windowProc(Display.java:1794) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:1155) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:71) at org.eclipse.swt.widgets.Control.windowProc(Control.java:2662) at org.eclipse.swt.widgets.Display.windowProc(Display.java:1794) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:1155) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:71) at org.eclipse.swt.widgets.Control.windowProc(Control.java:2662) at org.eclipse.swt.widgets.Display.windowProc(Display.java:1794) at org.eclipse.swt.internal.win32.OS.PeekMessageW(Native Method) at org.eclipse.swt.internal.win32.OS.PeekMessage(OS.java:1519) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:1195) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:815) at org.eclipse.ui.internal.Workbench.run(Workbench.java:798) at org.eclipse.core.internal.boot.InternalBootLoader.run (InternalBootLoader.java:821) at org.eclipse.core.boot.BootLoader.run(BootLoader.java:285) at java.lang.reflect.Method.invoke(Native Method) at org.eclipse.core.launcher.Main.basicRun(Main.java:151) at org.eclipse.core.launcher.Main.run(Main.java:502) at org.eclipse.core.launcher.UIMain.main(UIMain.java:52)
Require some more details: * Eclispe version * The stack frame you were in (source/binary/system package, etc) * the exrepssion evaluated
Eclipse version: 20011219 Stack frame I was in: org.eclipse.ui.part.MultiPageSelectionProvider.getSelection Target VM: HDK 1.3 Selection: 'activeEditor', a temporary variable The debugger had stopped because of a NullPointerException breakpoint. MultiPageSelectionProvider was not loaded in my workspace, but its source was displayed in the debugger.
Known problem. The current evaluation technology, when self-hosting, only works for projects that are "source projects" (as opposed to imported binary projects). The reason for this is that the Eclipse class loader is unable to see the "temp eval file" we deploy to do the evaluation.
*** This bug has been marked as a duplicate of 1546 ***
