Bug 122982 [KeyBindings] errors: No warning when creating an invalid keybinding sequence
I tried to map COLUMN_PREVIOUS to ARROW_LEFT in my plug.xml. But I set it to "LEFT" instead. LEFT is unrecognized, yet there was no warning in the .log file indicating that an invalid sequence had been set. I also have debug keybindings enabled in my options file, and it did not spew any complaints either.
bundles/org.eclipse.jface/src/org/eclipse/jface/bindings/keys/KeyStroke.java
try {
			return new KeyStroke(modifierKeys, naturalKey);
		} catch (final Throwable t) {
			throw new ParseException("Cannot create key stroke with " 
					+ modifierKeys + " and " + naturalKey); 
		}
	}
	/**
	 * An integer representation of the modifier keys; <code>NO_KEY</code>
	 * means that there is no modifier key.
	 */
	private final int modifierKeys;
	/**
	 * The natural key for this key stroke. This value is <code>NO_KEY</code>
	 * if the key stroke is incomplete (i.e., has no natural key).
	 */
	private final int naturalKey;
	/**
	 * Constructs an instance of <code>KeyStroke</code> given a set of
	 * modifier keys and a natural key.
	 * 
	 * @param modifierKeys
	 *            the modifier keys. The format of this integer is defined by
	 *            whichever widget toolkit you are using; <code>NO_KEY</code>
	 *            always means no modifier keys.
	 * @param naturalKey
	 *            the natural key. The format of this integer is defined by
	 *            whichever widget toolkit you are using; <code>NO_KEY</code>
	 *            always means no natural key.
	 * @see SWTKeySupport