0004929: Array is passed as reference, even though function is defined as pass-by-value

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ID:	Category:	Severity:	Reproducibility:	Date Submitted:	Last Update:
4929		major	always	01-24-12 06:39	06-21-12 01:23

Reporter:	jgilje	Platform:
Assigned To:	nam	OS:
Priority:	normal	OS Version:
Status:	closed	Product Version:	4.0.14
Product Build:		Resolution:	unable to reproduce
Projection:	none
ETA:	none	Fixed in Version:

Summary:	0004929: Array is passed as reference, even though function is defined as pass-by-value
Description:	Using the latest version of wordpress, I had trouble using the page-editor. On wp-admin/edit.php?post_type=page no edit links appear. I narrowed the bug down to the global variable $wp_post_types getting corrupted by the callstack starting at wp-admin/includes/post.php - line 852 - call to get_post_types(); wp-includes/post.php - line 854 - call to wp_filter_object_list(); wp-includes/functions.php - 3228 - call to wp_list_pluck(); wp-includes/functions.php - 3286 - definition of wp_list_pluck(); After the call to wp_list_pluck(), $wp_post_types is corrupted. However, if changing the function wp_list_pluck() to create a copy of its $list parameter as follows function wp_list_pluck( $list, $field ) { $ret = array(); foreach ( $list as $key => $value ) { if ( is_object( $value ) ) $ret[ $key ] = $value->$field; else $ret[ $key ] = $value[ $field ]; } return $ret; } it works perfectly. To me, this seems as the $list variable passed to wp_list_pluck() is assigned by reference and not by value through the callstack coming from get_post_types() in wp-includes/post.php - even though the functions involved does not specify pass-by-reference.
Steps To Reproduce:
Additional Information:
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Attached Files:	diff.txt [^] (569 bytes) 01-24-12 06:39

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