Bug 61743 NPE in MessageDialog with null parent shell
I-build 2004-05-11 I have code that does the following: MessageDialog.openInformation(null, "Showing element", "Showning an integer of value: "+((Integer)match.getElement()).intValue()); This leads to a null pointer with the follwing stack trace: Thread [main] (Suspended (exception NullPointerException)) MessageDialog.<init>(Shell, String, Image, String, int, String[], int) line: 126 MessageDialog.openInformation(Shell, String, String) line: 305 TestUIParticipant.showMatch(Match, int, int, boolean) line: 57 JavaSearchResultPage.showMatch(Match, int, int, boolean) line: 153 AbstractTextSearchViewPage$9.run() line: 723 <snip> The API doc for MessageDialog say that I'm allowed to pass in null for the parent shell.
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/ProgressMonitorDialog.java
* @param cancelable
	 *            <code>true</code> if the end user can cancel this progress
	 *            dialog, and <code>false</code> if it cannot be canceled
	 */
	public void setCancelable(boolean cancelable) {
		if (cancel == null)
			enableCancelButton = cancelable;
		else
			asyncSetOperationCancelButtonEnabled(cancelable);
	}
	/**
	 * Helper to enable/disable Cancel button for this dialog.
	 * 
	 * @param b
	 *            <code>true</code> to enable the cancel button, and
	 *            <code>false</code> to disable it
	 * @since 3.0
	 */
	protected void setOperationCancelButtonEnabled(boolean b) {
		operationCancelableState = b;
		cancel.setEnabled(b);
	}
	/*
	 * @see org.eclipse.jface.dialogs.IconAndMessageDialog#getImage()
	 */
	protected Image getImage() {
		return getShell().getDisplay().getSystemImage(SWT.ICON_INFORMATION);
	}
	/**
	 * Set the message in the message label.