facebook/hhvm — pull request #3457 by SiebelsTim (2014-08-13 16:58:55+00:00)
Title: Fix json_encode UTF8 error

Removed the hack to not return false on utf8 errors
That hack was introduced due to getting utf8 errors on unexpected situations

Seems to be working now, so remove the hack.

Changed one test in slow to properly match php