Tab completion broken in LiveScript 1.5 REPL

[cjld]

When I type tab after enter String in LiveScript 1.5 REPL

ls> String.
global           process          GLOBAL           root             Buffer
clear-immediate  clear-interval   clear-timeout    set-immediate    set-interval
set-timeout      console          module           exports          require
LiveScript       path             fs               util             say
warn             die              p                pp               ppp

The completion result doesn't show members of String.
in LiveScript 1.4, it works well:

ls> String.
String.__defineGetter__      String.__defineSetter__      String.__lookupGetter__
String.__lookupSetter__      String.__proto__             String.constructor
String.hasOwnProperty        String.isPrototypeOf         String.propertyIsEnumerable
String.toLocaleString        String.toString              String.valueOf

String.apply                 String.arguments             String.bind
String.call                  String.caller                String.length
String.name                  

String.fromCharCode          String.fromCodePoint         String.prototype
String.raw                   

[rhendric]

Paging @raine... this looks like a consequence of #732. Thoughts?