joyent/node — pull request #8122 by zcbenz (2014-08-10 02:50:55+00:00)
Title: src: change kIsolateSlot to 3

The slot 0 and 1 had already been taken by "gin" and "blink" in Chromium, and the size of isolate's slots is 4 by default, so using 3 should hopefully make node work independently when embedded into other application.