0002428: XDEBUG_MODE=develop and set_error_handler for deprecated null key in array

ID	Project	Category	View Status	Date Submitted	Last Update
0002428	Xdebug	Uncategorized	public	2026-05-29 12:39	2026-05-29 15:13

Reporter	erjot	Assigned To
Priority	normal	Severity	major	Reproducibility	always
Status	acknowledged	Resolution	open
Product Version	3.5.1
Target Version	3.5dev

Summary	0002428: XDEBUG_MODE=develop and set_error_handler for deprecated null key in array
Description	when an error handler is added in the code, the array does not support null keys (which are deprecated as of 8.5.x)
Steps To Reproduce	`➜ ~ XDEBUG_MODE=off php php85-nullkey-min.php { "php": "8.5.6", "iterations": 100, "lost_dropped": 0, "kept_ok": 100 } # OK!` `➜ ~ XDEBUG_MODE=off php php85-nullkey-min.php attach attach error handler { "php": "8.5.6", "iterations": 100, "lost_dropped": 0, "kept_ok": 100 } # OK!` `➜ ~ XDEBUG_MODE=develop php php85-nullkey-min.php { "php": "8.5.6", "iterations": 100, "lost_dropped": 0, "kept_ok": 100 } #OK!` `➜ ~ XDEBUG_MODE=develop php php85-nullkey-min.php attach attach error handler { "php": "8.5.6", "iterations": 100, "lost_dropped": 100, "kept_ok": 0 # WRONG!! kept_ok == 0, lost_droppped = 100!`
Additional Information	PHP 8.5.6 (cli) (built: May 5 2026 21:19:36) (NTS) Copyright (c) The PHP Group Built by Shivam Mathur Zend Engine v4.5.6, Copyright (c) Zend Technologies with Xdebug v3.5.1, Copyright (c) 2002-2026, by Derick Rethans with Zend OPcache v8.5.6, Copyright (c), by Zend Technologies
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Operating System
PHP Version	8.5.0-8.5.4