eclipse编译出错，为什么？

!ENTRY org.eclipse.core.resources 4 2 2006-07-28 16:49:00.109
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.core.resources".
!STACK 0
org.eclipse.swt.SWTException: Widget is disposed
 at org.eclipse.swt.SWT.error(SWT.java:2942)
 at org.eclipse.swt.SWT.error(SWT.java:2865)
 at org.eclipse.swt.SWT.error(SWT.java:2836)
 at org.eclipse.swt.widgets.Widget.error(Widget.java:395)
 at org.eclipse.swt.widgets.Widget.getDisplay(Widget.java:505)
 at org.eclipse.ui.internal.progress.ProgressMonitorFocusJobDialog$4.runAsync(ProgressMonitorFocusJobDialog.java:257)
 at org.eclipse.ui.internal.progress.ProgressMonitorFocusJobDialog$4.internalWorked(ProgressMonitorFocusJobDialog.java:221)
 at org.eclipse.ui.internal.progress.ProgressManager$JobMonitor.internalWorked(ProgressManager.java:230)
 at org.eclipse.core.runtime.ProgressMonitorWrapper.internalWorked(ProgressMonitorWrapper.java:94)
 at org.eclipse.core.runtime.SubProgressMonitor.internalWorked(SubProgressMonitor.java:147)
 at org.eclipse.core.runtime.ProgressMonitorWrapper.internalWorked(ProgressMonitorWrapper.java:94)
 at org.eclipse.core.runtime.SubProgressMonitor.internalWorked(SubProgressMonitor.java:147)
 at org.eclipse.core.runtime.SubProgressMonitor.worked(SubProgressMonitor.java:173)
 at org.eclipse.jdt.internal.core.builder.BuildNotifier.updateProgress(BuildNotifier.java:265)
 at org.eclipse.jdt.internal.core.builder.BuildNotifier.done(BuildNotifier.java:109)
 at org.eclipse.jdt.internal.core.builder.JavaBuilder.build(JavaBuilder.java:196)
 at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:593)
 at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1044)
 at org.eclipse.core.runtime.Platform.run(Platform.java:783)
 at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:168)
 at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:202)
 at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:231)
 at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1044)
 at org.eclipse.core.runtime.Platform.run(Platform.java:783)
 at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:234)
 at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:303)
 at org.eclipse.core.internal.resources.Project.build(Project.java:106)
 at org.eclipse.ui.actions.BuildAction.invokeOperation(BuildAction.java:190)
 at org.eclipse.ui.actions.WorkspaceAction.execute(WorkspaceAction.java:133)
 at org.eclipse.ui.actions.WorkspaceAction$2.runInWorkspace(WorkspaceAction.java:424)
 at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
 at org.eclipse.core.internal.jobs.Worker.run(Worker.java:76)

!ENTRY org.eclipse.core.resources 4 2 2006-07-28 16:49:00.156
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.core.resources".
!STACK 0
org.eclipse.swt.SWTException: Widget is disposed
 at org.eclipse.swt.SWT.error(SWT.java:2942)
 at org.eclipse.swt.SWT.error(SWT.java:2865)
 at org.eclipse.swt.SWT.error(SWT.java:2836)
 at org.eclipse.swt.widgets.Widget.error(Widget.java:395)
 at org.eclipse.swt.widgets.Widget.getDisplay(Widget.java:505)
 at org.eclipse.ui.internal.progress.ProgressMonitorFocusJobDialog$4.runAsync(ProgressMonitorFocusJobDialog.java:257)
 at org.eclipse.ui.internal.progress.ProgressMonitorFocusJobDialog$4.internalWorked(ProgressMonitorFocusJobDialog.java:221)
 at org.eclipse.ui.internal.progress.ProgressManager$JobMonitor.internalWorked(ProgressManager.java:230)
 at org.eclipse.core.runtime.ProgressMonitorWrapper.internalWorked(ProgressMonitorWrapper.java:94)
 at org.eclipse.core.runtime.SubProgressMonitor.done(SubProgressMonitor.java:132)
 at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:207)
 at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:231)
 at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1044)
 at org.eclipse.core.runtime.Platform.run(Platform.java:783)
 at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:234)
 at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:303)
 at org.eclipse.core.internal.resources.Project.build(Project.java:106)
 at org.eclipse.ui.actions.BuildAction.invokeOperation(BuildAction.java:190)
 at org.eclipse.ui.actions.WorkspaceAction.execute(WorkspaceAction.java:133)
 at org.eclipse.ui.actions.WorkspaceAction$2.runInWorkspace(WorkspaceAction.java:424)
 at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
 at org.eclipse.core.internal.jobs.Worker.run(Worker.java:76)

!ENTRY org.eclipse.core.runtime 4 2 2006-07-28 16:49:00.218
!MESSAGE An internal error occurred during: "Build Project".
!STACK 0
org.eclipse.swt.SWTException: Widget is disposed
 at org.eclipse.swt.SWT.error(SWT.java:2942)
 at org.eclipse.swt.SWT.error(SWT.java:2865)
 at org.eclipse.swt.SWT.error(SWT.java:2836)
 at org.eclipse.swt.widgets.Widget.error(Widget.java:395)
 at org.eclipse.swt.widgets.Widget.getDisplay(Widget.java:505)
 at org.eclipse.ui.internal.progress.ProgressMonitorFocusJobDialog$4.runAsync(ProgressMonitorFocusJobDialog.java:257)
 at org.eclipse.ui.internal.progress.ProgressMonitorFocusJobDialog$4.done(ProgressMonitorFocusJobDialog.java:202)
 at org.eclipse.ui.internal.progress.ProgressManager$JobMonitor.done(ProgressManager.java:215)
 at org.eclipse.ui.actions.WorkspaceAction.execute(WorkspaceAction.java:143)
 at org.eclipse.ui.actions.WorkspaceAction$2.runInWorkspace(WorkspaceAction.java:424)
 at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
 at org.eclipse.core.internal.jobs.Worker.run(Worker.java:76)
!SESSION 2006-07-28 16:52:06.546 -----------------------------------------------
eclipse.buildId=unknown
java.version=1.4.2_06
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=zh_CN
Command-line arguments:  -os win32 -ws win32 -arch x86