Bug 24231 ErrorDialog not accessible
The reorg done for the MessageDialog was not applied to the ErrorDialog so its contents cannot be read in 2.0.2.
bundles/org.eclipse.ui.workbench/extensions/org/eclipse/jface/dialogs/ErrorDialog.java
if (message != null) {
		Label label = new Label(composite, SWT.WRAP);
		label.setText(message);
		GridData data = new GridData(
			GridData.GRAB_HORIZONTAL |
			GridData.GRAB_VERTICAL |
			GridData.HORIZONTAL_ALIGN_FILL |
			GridData.VERTICAL_ALIGN_CENTER);
		data.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH);;
		label.setLayoutData(data);
		label.setFont(parent.getFont());
	}
	return composite;
}
/**
 * Returns the image to display beside the message in this dialog.
 * <p>
 * Subclasses may override.
 * </p>
 * 
 * @return the image to display beside the message
 * @since 2.0
 */
protected Image getImage() {
	return JFaceResources.getImageRegistry().get(DLG_IMG_ERROR);
}
/**
 * Create this dialog's drop-down list component.
 *