A bug occurred in Swoole-v6.0.2

[godfreybwaira]

I was running a swoole application on my local server, when I received a request i.e $server->on('request', ...) my application crashed due to internal error, then I got these stuffs...

WARNING Worker::report_error(): worker(pid=15163, id=2) abnormal exit, status=0, signal=11
A bug occurred in Swoole-v6.0.2, please report it.
The Swoole developers probably don't know about it,
and unless you report it, chances are it won't be fixed.
You can read How to report a bug doc before submitting any bug reports:

https://github.com/swoole/swoole-src/blob/master/.github/ISSUE.md
Please do not send bug reports in the mailing list or personal letters.
The issue page is also suitable to submit feature requests.

OS: Linux 5.15.0-139-generic #149~20.04.1-Ubuntu SMP Wed Apr 16 08:29:56 UTC 2025 x86_64
GCC_VERSION: 9.4.0
OPENSSL_VERSION: OpenSSL 1.1.1f 31 Mar 2020
PHP_VERSION : 8.4.5

[NathanFreeman]

please show me your php extensions.
php -m

[godfreybwaira]

[PHP Modules]
calendar
Core
ctype
curl
date
dom
exif
FFI
fileinfo
filter
ftp
gettext
hash
iconv
json
libxml
mbstring
mysqli
mysqlnd
openssl
pcntl
pcre
PDO
pdo_mysql
Phar
posix
random
readline
Reflection
session
shmop
SimpleXML
sockets
sodium
SPL
standard
swoole
sysvmsg
sysvsem
sysvshm
tokenizer
xml
xmlreader
xmlwriter
xsl
yaml
Zend OPcache
zip
zlib

[Zend Modules]
Zend OPcache

[NathanFreeman]

Please use Valgrind to check for issues in the program.
https://wiki.swoole.com/en/#/other/issue?id=memory-analysis-highly-recommended

[godfreybwaira]

==18598== Memcheck, a memory error detector
==18598== Copyright (C) 2002-2024, and GNU GPL'd, by Julian Seward et al.
==18598== Using Valgrind-3.25.0 and LibVEX; rerun with -h for copyright info
==18598== Command: php index.php
==18598== Parent PID: 14218
==18598==
==18638== Warning: client switching stacks? SP change: 0x1ffeffbaf8 --> 0xc8c9b08
==18638== to suppress, use: --max-stackframe=137211617264 or greater
==18638== Warning: client switching stacks? SP change: 0xc8c9ad8 --> 0x1ffeffbaf8
==18638== to suppress, use: --max-stackframe=137211617312 or greater
==18638== Warning: client switching stacks? SP change: 0x1ffeffb528 --> 0xcea1ff8
==18638== to suppress, use: --max-stackframe=137205486896 or greater
==18638== further instances of this message will not be shown.
==18638== Invalid read of size 8
==18638== at 0xA22F31E: swoole::PHPCoroutine::create_context(swoole::PHPCoroutine::Args*) (in /usr/lib/php/20240924/swoole.so)
==18638== by 0xA23036A: swoole::PHPCoroutine::main_func(void*) (in /usr/lib/php/20240924/swoole.so)
==18638== by 0xA255D67: swoole::coroutine::Context::context_func(transfer_t) (in /usr/lib/php/20240924/swoole.so)
==18638== by 0xA2FA6D6: swoole_make_fcontext (in /usr/lib/php/20240924/swoole.so)
==18638== Address 0x18 is not stack'd, malloc'd or (recently) free'd
==18638==
==18638==
==18638== Process terminating with default action of signal 11 (SIGSEGV)
==18638== Access not within mapped region at address 0x18
==18638== at 0xA22F31E: swoole::PHPCoroutine::create_context(swoole::PHPCoroutine::Args*) (in /usr/lib/php/20240924/swoole.so)
==18638== by 0xA23036A: swoole::PHPCoroutine::main_func(void*) (in /usr/lib/php/20240924/swoole.so)
==18638== by 0xA255D67: swoole::coroutine::Context::context_func(transfer_t) (in /usr/lib/php/20240924/swoole.so)
==18638== by 0xA2FA6D6: swoole_make_fcontext (in /usr/lib/php/20240924/swoole.so)
==18638== If you believe this happened as a result of a stack
==18638== overflow in your program's main thread (unlikely but
==18638== possible), you can try to increase the size of the
==18638== main thread stack using the --main-stacksize= flag.
==18638== The main thread stack size used in this run was 8388608.
==18638==
==18638== HEAP SUMMARY:
==18638== in use at exit: 11,280,625 bytes in 42,864 blocks
==18638== total heap usage: 74,621 allocs, 31,757 frees, 25,000,193 bytes allocated
==18638==
==18638== LEAK SUMMARY:
==18638== definitely lost: 49,813 bytes in 1,302 blocks
==18638== indirectly lost: 40 bytes in 1 blocks
==18638== possibly lost: 3,695,167 bytes in 22,981 blocks
==18638== still reachable: 7,519,047 bytes in 18,579 blocks
==18638== suppressed: 16,558 bytes in 1 blocks
==18638== Rerun with --leak-check=full to see details of leaked memory
==18638==
==18638== For lists of detected and suppressed errors, rerun with: -s
==18638== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)

[NathanFreeman]

Execute the following commands and share their outputs:
php --ri swoole
php --ri curl
php --ri openssl

Also, try disabling the opcache extension to see if that resolves the issue.

[godfreybwaira]

I know how to reproduce the error. It occurs when accessing undeclared variable.

[godfreybwaira]

php --ri swoole

swoole

Swoole => enabled
Author => Swoole Team team@swoole.com
Version => 6.0.2
Built => Apr 7 2025 19:59:48
coroutine => enabled with boost asm context
epoll => enabled
eventfd => enabled
signalfd => enabled
cpu_affinity => enabled
spinlock => enabled
rwlock => enabled
sockets => enabled
openssl => OpenSSL 1.1.1f 31 Mar 2020
dtls => enabled
http2 => enabled
json => enabled
curl-native => enabled
curl-version => 7.68.0
c-ares => 1.15.0
mutex_timedlock => enabled
pthread_barrier => enabled
futex => enabled
mysqlnd => enabled
coroutine_pgsql => enabled
coroutine_sqlite => enabled

Directive => Local Value => Master Value
swoole.enable_library => On => On
swoole.enable_fiber_mock => Off => Off
swoole.enable_preemptive_scheduler => Off => Off
swoole.display_errors => On => On
swoole.use_shortname => On => On
swoole.unixsock_buffer_size => 8388608 => 8388608

[godfreybwaira]

php --ri curl

curl

cURL support => enabled
cURL Information => 7.68.0
Age => 5
Features
AsynchDNS => Yes
CharConv => No
Debug => No
GSS-Negotiate => No
IDN => Yes
IPv6 => Yes
krb4 => No
Largefile => Yes
libz => Yes
NTLM => Yes
NTLMWB => Yes
SPNEGO => Yes
SSL => Yes
SSPI => No
TLS-SRP => Yes
HTTP2 => Yes
GSSAPI => Yes
KERBEROS5 => Yes
UNIX_SOCKETS => Yes
PSL => Yes
HTTPS_PROXY => Yes
MULTI_SSL => No
BROTLI => Yes
ALTSVC => No
HTTP3 => No
Protocols => dict, file, ftp, ftps, gopher, http, https, imap, imaps, ldap, ldaps, pop3, pop3s, rtmp, rtsp, scp, sftp, smb, smbs, smtp, smtps, telnet, tftp
Host => x86_64-pc-linux-gnu
SSL Version => OpenSSL/1.1.1f
ZLib Version => 1.2.11
libSSH Version => libssh/0.9.3/openssl/zlib

Directive => Local Value => Master Value
curl.cainfo => no value => no value

[godfreybwaira]

php --ri openssl

openssl

OpenSSL support => enabled
OpenSSL Library Version => OpenSSL 1.1.1f 31 Mar 2020
OpenSSL Header Version => OpenSSL 1.1.1f 31 Mar 2020
Openssl default config => /usr/lib/ssl/openssl.cnf

Directive => Local Value => Master Value
openssl.cafile => no value => no value
openssl.capath => no value => no value