Incorrect Argument Count Error

Hey Internals, I'm working on the patch to change the error exception to \ArgumentCountError instead of \Error when too few, or too many arguments are passed in as discussed a couple of weeks ago. To be BC with 7.0, this extends \TypeError, which is the exception currently thrown when strict_types=1 for both userland and internal functions. I've run into an issue where things are inconsistent for internal functions. For example, the array_* functions, like array_diff, still have a warning thrown, regardless of strict_types: php_error_docref(NULL, E_WARNING, "at least %d parameters are required, %d given", req_args, ZEND_NUM_ARGS()); It seems that fixing this will be: a) a mammoth task b) a huge BC break (stuff that currently throws a warning in strict_types mode will now throw an exception, similar BC break as we're implementing for userland functions regardless of strict_types) c) something we should have done for 7.0, and that we cannot change now. We are currently heading in 7.1.0RC1 in two weeks, and I want this issue resolved in its entirety before then. What say you, internals? - Davey