[1] Bug 20141 – Cannot call pointer to function console.log ( (2013-04-19 08:49:47 +09:00 版)) <https://bugs.webkit.org/show_bug.cgi?id=20141>

[2] IRC logs: freenode / #whatwg / 20130414 ( (2013-04-17 21:14:16 +09:00 版)) <http://krijnhoetmer.nl/irc-logs/whatwg/20130414#l-356>