Eclipse Integration 1.6.1: qtcppdesigner causes org.eclipse.swt.SWTException: Invalid thread access

FYI:

Under Eclipse Galileo and Helios (CDT 6 and 7), Linux X86_64, qt designer (com.trolltech.qtcppdesigner) causes the CDT Reference Search feature to fail with “org.eclipse.swt.SWTException: Invalid thread access”. (The designer Is being polled for dirty files when this happens (see stack below) but it doesn’t make any difference if the ui file is dirty or not).

Edit: This also affects other CDT search features.

Workaround: close qtdesigner before using the Reference feature.

Stack:

org.eclipse.swt.SWTException: Invalid thread access
at org.eclipse.swt.SWT.error(SWT.java:3884)
at org.eclipse.swt.SWT.error(SWT.java:3799)
at org.eclipse.swt.SWT.error(SWT.java:3770)
at org.eclipse.swt.widgets.Widget.error(Widget.java:450)
at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:389)
at com.trolltech.qtcppdesigner.views.embedded.FormWindowW.isDirty(FormWindowW.java:141)
at com.trolltech.qtcppdesigner.editors.UiEditor.isDirty(UiEditor.java:159)
at org.eclipse.ui.internal.EditorManager.collectDirtyEditors(EditorManager.java:276)
at org.eclipse.ui.internal.EditorManager.getDirtyEditors(EditorManager.java:566)
at org.eclipse.ui.internal.WorkbenchPage.getDirtyEditors(WorkbenchPage.java:2071)
at org.eclipse.cdt.ui.CUIPlugin.getDirtyEditors(CUIPlugin.java:690)
…