0002331: Segmentation fault with 'invalid' variable names

ID	Project	Category	View Status	Date Submitted	Last Update
0002331	Xdebug	Step Debugging	public	2025-03-24 11:57	2025-05-14 09:36

Reporter	hburger	Assigned To
Priority	normal	Severity	minor	Reproducibility	have not tried
Status	closed	Resolution	fixed
Product Version	3.4.2
Target Version	3.4dev	Fixed in Version	3.4.3

Summary	0002331: Segmentation fault with 'invalid' variable names
Description	A segmentation fault happens when assigning any value to $GLOBALS using an index that ends with "-h" while step-debugging. Example: $GLOBALS["x"] = 1; -> works, $GLOBALS["x-h"] = 1; -> Segfault Without an active breakpoint the script will run fine. I could reproduce it through Apache as well as CLI
Steps To Reproduce	Using the attached example (test.php): Set a breakpoint on the echo-statement in line 3. Run the Script
Additional Information	PHP-Version: PHP 8.4.5 (cli) (built: Mar 13 2025 17:27:36) (NTS) Copyright (c) The PHP Group Zend Engine v4.4.5, Copyright (c) Zend Technologies with Zend OPcache v8.4.5, Copyright (c), by Zend Technologies with Xdebug v3.4.2, Copyright (c) 2002-2025, by Derick Rethans I ran the code inside a Docker Container using "debian:bookworm-slim" as the image and installed php/xdebug from sury
Tags	No tags attached.

Operating System
PHP Version	8.4-dev

derick 2025-03-26 11:31 administrator ~0007220	This turns out to not be a problem with `$GLOBALS` per-se, but rather that the variable parser would see this as the syntax `$x-h` which isn't valid. Of course, you can set this in $GLOBALS by using the array syntax. I have fixed the crash with https://github.com/xdebug/xdebug/pull/1003, but Xdebug still won't be able to show you the value for it.