Bug 86184 [KeyBinding] registry: Missing key binding for paste in emacs scheme
3.1 M5a 1. start fresh workspace 2. Window > Preferences > General > Keys 3. switch to "Modify" 4. select emacs scheme 5. select "Edit" category 6. select "Paste" command ==> all key bindings are missing, only the binding provided by "Editing Text" is there. This might be caused by the fact that Ctrl+Y is already declared in org.eclipse.ui/plugin.xml for the redo command.
bundles/org.eclipse.jface/src/org/eclipse/jface/bindings/BindingManager.java
while (contextIdItr.hasNext()) {
			String childContextId = (String) contextIdItr.next();
			while (childContextId != null) {
				final Context childContext = contextManager
						.getContext(childContextId);
				try {
					final String parentContextId = childContext.getParentId();
					contextTree.put(childContextId, parentContextId);
					childContextId = parentContextId;
				} catch (final NotDefinedException e) {
					break; 
				}
			}
		}
		return contextTree;
	}
	/**
	 * <p>
	 * Creates a tree of context identifiers, representing the hierarchical
	 * structure of the given contexts. The tree is structured as a mapping from
	 * child to parent. In this tree, the key binding specific filtering of
	 * contexts will have taken place.
	 * </p>
	 * <p>
	 * This method completes in <code>O(n^2)</code>, where <code>n</code>
	 * is the height of the context tree.
	 * </p>
	 * 
	 * @param contextIds
	 *            The set of context identifiers to be converted into a tree;