Call to undefined function is_wp_error() when there's no wp-config.php at install

[jottlieb]

If you try to start to install WP without having a wp-config.php and execute /wp-admin/install.php (!), it appears just the following error:

Fatal error: Call to undefined function is_wp_error() in path\wp-includes\functions.php on line 1320

[rob1n]

(In [5507]) Don't call is_wp_error() in wp_die() if it hasn't been defined yet. fixes #4308

[ryan]

wp-blog-header.php includes classes.php, functions.php, plugin.php before issuing wp_die(). This shouldn't be necessary.

[ryan]

My reading comprehension ain't so good. This is for install.php, which doesn't do the includes. Nevermind. :-)