[php-src] Issue #8083: Segfault getting debug info from a Closure containing a static variable
| From: | therealgaxbo | Date: | Fri, 11 Feb 2022 19:50:53 +0000 |
| Subject: | [php-src] Issue #8083: Segfault getting debug info from a Closure containing a static variable | ||
| Groups: | php.bugs | ||
| Request: | Send a blank email to php-bugs+get-239686@lists.php.net to get a copy of this message | ||
Issue: https://github.com/php/php-src/issues/8083
Author: therealgaxbo
### Description
Calling var_dump/print_r on a Closure that holds a static variable segfaults:
```php
<?php
function func(){
static $i;
}
$x = func(...);
var_dump($x);
```
The backtrace:
```
Core was generated by `php81 test.php'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x000055c24b2666c5 in zend_closure_get_debug_info (object=0x7f6d42c7e000, is_temp=<optimized
out>)
at /usr/src/debug/php81-php-8.1.2-1.fc35.remi.x86_64/Zend/zend_closures.c:564
564 ZEND_HASH_FOREACH_STR_KEY_VAL(static_variables, key, var) {
Missing separate debuginfos, use: dnf debuginfo-install postgresql14-libs-14.2-1PGDG.f35.x86_64
(gdb) bt
#0 0x000055c24b2666c5 in zend_closure_get_debug_info (object=0x7f6d42c7e000, is_temp=<optimized
out>)
at /usr/src/debug/php81-php-8.1.2-1.fc35.remi.x86_64/Zend/zend_closures.c:564
#1 0x000055c24b276fb1 in zend_std_get_properties_for (obj=<optimized out>,
purpose=<optimized out>)
at /usr/src/debug/php81-php-8.1.2-1.fc35.remi.x86_64/Zend/zend_object_handlers.c:1880
#2 0x000055c24b15e502 in php_var_dump (struc=0x7f6d42c140e0, level=1) at
/usr/src/debug/php81-php-8.1.2-1.fc35.remi.x86_64/ext/standard/var.c:163
#3 0x000055c24b15ea11 in zif_var_dump (execute_data=<optimized out>,
return_value=<optimized out>)
at /usr/src/debug/php81-php-8.1.2-1.fc35.remi.x86_64/ext/standard/var.c:228
#4 0x000055c24b250317 in ZEND_DO_ICALL_SPEC_RETVAL_UNUSED_HANDLER () at
/usr/src/debug/php81-php-8.1.2-1.fc35.remi.x86_64/Zend/zend_vm_execute.h:1235
#5 execute_ex (ex=0x55c24b454068) at
/usr/src/debug/php81-php-8.1.2-1.fc35.remi.x86_64/Zend/zend_vm_execute.h:55310
#6 0x000055c24b257319 in zend_execute (op_array=0x7f6d42c85000, return_value=0x0) at
/usr/src/debug/php81-php-8.1.2-1.fc35.remi.x86_64/Zend/zend_vm_execute.h:59673
#7 0x000055c24b1e7e10 in zend_execute_scripts (type=type@entry=8, retval=retval@entry=0x0,
file_count=file_count@entry=3)
at /usr/src/debug/php81-php-8.1.2-1.fc35.remi.x86_64/Zend/zend.c:1761
#8 0x000055c24b18344a in php_execute_script (primary_file=<optimized out>) at
/usr/src/debug/php81-php-8.1.2-1.fc35.remi.x86_64/main/main.c:2535
#9 0x000055c24b2cfb0e in do_cli (argc=2, argv=0x55c24d1f85c0) at
/usr/src/debug/php81-php-8.1.2-1.fc35.remi.x86_64/sapi/cli/php_cli.c:965
#10 0x000055c24b03ac1b in main (argc=2, argv=0x55c24d1f85c0) at
/usr/src/debug/php81-php-8.1.2-1.fc35.remi.x86_64/sapi/cli/php_cli.c:1367
```
This appears to be an 8.1 regression as I can't replicate on 8.0.15.
### PHP Version
PHP 8.1.2
### Operating System
Fedora 35