* This function is used to handle fatal errors. It takes a standard printf(3c) * format and arguments and outputs to stderr. It then either: * * -

* Safely check if an object has a property

* Allocate a JSParseNode from cx's temporary arena. */

** sprintf into a fixed size buffer. Make sure there is a NUL at the end ** when finished. */

* Check that obj is an object of class Date, and get the date value. * Return NULL on failure. */

Construct and initialize an RENode, returning NULL for out-of-memory */

ECMA-357 9.2.1.6 XMLList [[Append]]. */