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SIGSEGV in OPCache Preloading when using Typed Class Constants with Closures #21059
Description
Description
Hello,
A Segmentation Fault occurs when an OPCache preloaded class contains a typed constant assigned to a Closure.
I have made a reproducer : https://github.com/MariusJam/opcache-crash-const-closure-reproducer
Please note that I am not familiar with C debugging. I relied on AI assistance to get and interpret the strace logs and create this minimal reproducer.
PHP Version
PHP 8.5.2 (cli) (built: Jan 16 2026 23:16:53) (NTS)
Copyright (c) The PHP Group
Built by https://github.com/docker-library/php
Zend Engine v4.5.2, Copyright (c) Zend Technologies
with Zend OPcache v8.5.2, Copyright (c), by Zend Technologies
Operating System
Alpine or Debian (Docker)
Reacted by Ilija Tovilo and Volker Dusch
Activity
Fix segfault when preloading constant AST closure
iluuu1994 commentedon Jan 28, 2026
Nice reproducer, thanks @MariusJam!
Fix segfault when preloading constant AST closure