> db.eval( "q = function()

" );
Thu Jun 24 09:53:19 uncaught exception: {
"assertion" : "can't append type from:13",
"errmsg" : "db assertion failure",
"ok" : 0
}

This is a temporary workaround:

> db.eval( "q = {a:function() { print( 1 ); }}" );
{ "a" : function cf_3f()

}