Allow new style aliases to be stored

IPython/core/alias.py

@@ -211,6 +211,14 b' class AliasManager(Configurable):'
                                     "got: %r" % cmd)
         return True
 
+    def retrieve_alias(self, name):
+        """Retrieve the command to which an alias expands."""
+        caller = self.shell.magics_manager.magics['line'].get(name, None)
+        if isinstance(caller, AliasCaller):
+            return caller.cmd
+        else:
+            raise ValueError('%s is not an alias' % name)
+
     def call_alias(self, alias, rest=''):
         """Call an alias given its name and the rest of the line."""
         cmd = self.transform_alias(alias, rest)

IPython/extensions/storemagic.py

@@ -211,16 +211,17 b' class StoreMagics(Magics, Configurable):'
             except KeyError:
                 # it might be an alias
                 # This needs to be refactored to use the new AliasManager stuff.
-                if args[0] in ip.alias_manager:
                     name = args[0]
-                    nargs, cmd = ip.alias_manager.alias_table[ name ]
+                try:
+                    cmd = ip.alias_manager.retrieve_alias(name)
+                except ValueError:
+                    raise UsageError("Unknown variable '%s'" % name)
+                
                     staliases = db.get('stored_aliases',{})
                     staliases[ name ] = cmd
                     db['stored_aliases'] = staliases
                     print "Alias stored: %s (%s)" % (name, cmd)
                     return
-                else:
-                    raise UsageError("Unknown variable '%s'" % args[0])
 
             else:
                 modname = getattr(inspect.getmodule(obj), '__name__', '')