segfault in Zend/tests/assign_coalesce_001.phpt

Description

Doing the following:

hans@DESKTOP-EE15SLU:~/projects/php-src$ git log -1
commit da6a4e799aafdf33c8701fcdd632d646f61e612e (HEAD -> master, origin/master, origin/HEAD)
Merge: 1cc0a16752 ae44ab47a7
Author: Jakub Zelenka <bukka@php.net>
Date:   Sun Feb 4 12:01:09 2024 +0000

    Merge branch 'PHP-8.3'
hans@DESKTOP-EE15SLU:~/projects/php-src$ git status
On branch master
Your branch is up to date with 'origin/master'.

nothing to commit, working tree clean
hans@DESKTOP-EE15SLU:~/projects/php-src$ ./buildconf >/dev/null
hans@DESKTOP-EE15SLU:~/projects/php-src$ ./configure --disable-all --disable-cgi --enable-cli >/dev/null
hans@DESKTOP-EE15SLU:~/projects/php-src$ make clean >/dev/null;
hans@DESKTOP-EE15SLU:~/projects/php-src$ make -j$(nproc) >/dev/null
/home/hans/projects/php-src/ext/pcre/pcre2lib/pcre2_compile.c: In function ‘compile_regex’:
/home/hans/projects/php-src/ext/pcre/pcre2lib/pcre2_compile.c:8169:17: warning: storing the address of local variable ‘capitem’ in ‘*cb.open_caps’ [-Wdangling-pointer=]
 8169 |   cb->open_caps = &capitem;
      |   ~~~~~~~~~~~~~~^~~~~~~~~~
/home/hans/projects/php-src/ext/pcre/pcre2lib/pcre2_compile.c:8106:14: note: ‘capitem’ declared here
 8106 | open_capitem capitem;
      |              ^~~~~~~
/home/hans/projects/php-src/ext/pcre/pcre2lib/pcre2_compile.c:8100:39: note: ‘cb’ declared here
 8100 |   branch_chain *bcptr, compile_block *cb, PCRE2_SIZE *lengthptr)
In file included from /home/hans/projects/php-src/Zend/zend.h:32,
                 from /home/hans/projects/php-src/Zend/zend_API.c:22:
In function ‘zend_check_magic_method_implementation’,
    inlined from ‘zend_register_functions’ at /home/hans/projects/php-src/Zend/zend_API.c:3035:4:
/home/hans/projects/php-src/Zend/zend_API.c:2636:34: warning: array subscript ‘zend_function {aka const union _zend_function}[0]’ is partly outside array bounds of ‘unsigned char[136]’ [-Warray-bounds=]
 2636 |         if (ZSTR_VAL(fptr->common.function_name)[0] != '_'
/home/hans/projects/php-src/Zend/zend_string.h:68:26: note: in definition of macro ‘ZSTR_VAL’
   68 | #define ZSTR_VAL(zstr)  (zstr)->val
      |                          ^~~~
/home/hans/projects/php-src/Zend/zend_API.c: In function ‘zend_register_functions’:
/home/hans/projects/php-src/Zend/zend_API.c:2926:32: note: object of size 136 allocated by ‘malloc’
 2926 |                 reg_function = malloc(sizeof(zend_internal_function));
      |                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
hans@DESKTOP-EE15SLU:~/projects/php-src$ ./sapi/cli/php ./run-tests.php Zend/tests/assign_coalesce_001.phpt --show-diff

resulted in:

=====================================================================
PHP         : /home/hans/projects/php-src/sapi/cli/php
PHP_SAPI    : cli
PHP_VERSION : 8.4.0-dev
ZEND_VERSION: 4.4.0-dev
PHP_OS      : Linux - Linux DESKTOP-EE15SLU 5.15.133.1-microsoft-standard-WSL2 #1 SMP Thu Oct 5 21:02:42 UTC 2023 x86_64
INI actual  : /home/hans/projects/php-src
More .INIs  :
---------------------------------------------------------------------
PHP         : /home/hans/projects/php-src/sapi/phpdbg/phpdbg
PHP_SAPI    : phpdbg
PHP_VERSION : 8.4.0-dev
ZEND_VERSION: 4.4.0-dev
PHP_OS      : Linux - Linux DESKTOP-EE15SLU 5.15.133.1-microsoft-standard-WSL2 #1 SMP Thu Oct 5 21:02:42 UTC 2023 x86_64
INI actual  : /home/hans/projects/php-src
More .INIs  :
---------------------------------------------------------------------
CWD         : /home/hans/projects/php-src
Extra dirs  :
VALGRIND    : Not used
=====================================================================
Running selected tests.
TEST 1/1 [Zend/tests/assign_coalesce_001.phpt]
========DIFF========
--
     }

     Static props:
042- int(123)
043- string(3) "foo"
044- id(foo)
045- id(foo)
046- id(bar)
047- int(123)
048- string(3) "foo"
042+ Segmentation fault
043+
044+ Termsig=11
========DONE========
FAIL Coalesce assign (??=): Basic behavior [Zend/tests/assign_coalesce_001.phpt]
=====================================================================
Number of tests :     1                 1
Tests skipped   :     0 (  0.0%) --------
Tests warned    :     0 (  0.0%) (  0.0%)
Tests failed    :     1 (100.0%) (100.0%)
Tests passed    :     0 (  0.0%) (  0.0%)
---------------------------------------------------------------------
Time taken      : 0.003 seconds
=====================================================================

=====================================================================
FAILED TEST SUMMARY
---------------------------------------------------------------------
Coalesce assign (??=): Basic behavior [Zend/tests/assign_coalesce_001.phpt]
=====================================================================

but I expected the test to pass.

PHP Version

8.4.0-dev commit da6a4e799aafdf33c8701fcdd632d646f61e612e

Operating System

WSL2 Ubuntu 24.04-dev