Error ``this._callback is not a function'' [x-] in file ``chrome://https-everywhere/content/code/IOUtil.js'', line 629, character 0.
Exception ``TypeError: this._callback is not a function'' thrown from function anonymous(ctx=null:null, r=XPComponent:{82}) in <chrome://https-everywhere/content/code/IOUtil.js> line 629.
[] message = [string] "this._callback is not a function"

Exception ``2147500034'' thrown from function anonymous(iid=XPComponent:{7}) in <file:/home/pde/.mozilla/firefox/uoxh1c2i.https%20everywhere%20testing/extensions/https-everywhere@eff.org/components/https-everywhere.js> line 109.