facebook/hhvm — pull request #2036 by mugwhump (2014-03-12 00:29:52+00:00)
Title: Fix for is_callable throwing array->string conversion notices

See facebook/hhvm/#1995

is_callable() gives an array->string conversion notice on line 95 in hphp/runtime/ext/ext_function.cpp. Calling toString() on it doesn't seem to actually be necessary, since we've already checked that it's an array, so it's always going to return "Array".