Shutdown crash: "fatal error: non-Go code disabled sigaltstack"

[Th3Mouk]

What happened?

Hello !

I've upgraded my Docker image from 1.9.1... to frankenphp:1.11.1-php8.5.2-bookworm and since when I stop or restart a container that had handled at least 1 HTTP request, I've got a crash.
It can be an issue for projects that are using blue/green deployments or horizontal scaling because containers will not stop gracefully.

I'm not used to Go development so I asked an LLM to lead an investigation to ensure the problem was not on my side, and then propose a clue here to see if it can help you.

According to it's "analyse" ARM64 architecture seems impacted due to a stricter signal management.

This is what it has proposed:

Root Cause

PR #2033 added runtime.Gosched() at the start of handleRequestWithRegularPHPThreads() to improve tail latency. During graceful shutdown:

1. Final request arrives (health check, connection draining)
2. runtime.Gosched() yields control to scheduler
3. PHP thread shutdown begins while Go is yielded
4. C layer disables sigaltstack during cleanup
5. Go resumes from Gosched, expects sigaltstack configured
6. PANIC on ARM64 (strict signal stack requirements)

Timeline visualization:

handleRequestWithRegularPHPThreads() → Gosched() yields
                                       ↓
                     PHP cleanup disables sigaltstack
                                       ↓
                     Go resumes, expects sigaltstack
                                       ↓
                     CRASH: "non-Go code disabled sigaltstack"

Solution

Check if ANY thread is in shutdown state before calling runtime.Gosched():

// Only yield if no threads are shutting down
// Prevents ARM64 sigaltstack race during cleanup
if !isAnyThreadShuttingDown() {
    runtime.Gosched()
}

func isAnyThreadShuttingDown() bool {
    regularThreadMu.RLock()
    defer regularThreadMu.RUnlock()

    for _, thread := range regularThreads {
        state := thread.state.Get()
        if state == state.ShuttingDown || state == state.Done {
            return true
        }
    }
    return false
}

If I can help by any way to debug it further tell me.

TY for your time and consideration.

Build Type

Docker (Debian Bookworm)

Worker Mode

No

Operating System

macOS

CPU Architecture

Apple Silicon

PHP configuration

phpinfo()
PHP Version => 8.5.2

System => Linux 5b663fc7c974 6.12.54-linuxkit #1 SMP Tue Nov  4 21:21:47 UTC 2025 aarch64
Build Date => Jan 16 2026 23:20:06
Build System => Linux - Docker
Build Provider => https://github.com/docker-library/php
Configure Command =>  './configure'  '--build=aarch64-linux-gnu' '--sysconfdir=/usr/local/etc' '--with-config-file-path=/usr/local/etc/php' '--with-config-file-scan-dir=/usr/local/etc/php/conf.d' '--enable-option-checking=fatal' '--with-mhash' '--with-pic' '--enable-mbstring' '--enable-mysqlnd' '--with-password-argon2' '--with-sodium=shared' '--with-pdo-sqlite=/usr' '--with-sqlite3=/usr' '--with-curl' '--with-iconv' '--with-openssl' '--with-readline' '--with-zlib' '--enable-phpdbg' '--enable-phpdbg-readline' '--with-pear' '--with-libdir=lib/aarch64-linux-gnu' '--enable-embed' '--enable-zts' '--disable-zend-signals' 'build_alias=aarch64-linux-gnu' 'PHP_UNAME=Linux - Docker' 'PHP_BUILD_PROVIDER=https://github.com/docker-library/php'
Server API => Command Line Interface
Virtual Directory Support => enabled
Configuration File (php.ini) Path => /usr/local/etc/php
Loaded Configuration File => /usr/local/etc/php/php.ini
Scan this dir for additional .ini files => /usr/local/etc/php/conf.d
Additional .ini files parsed => /usr/local/etc/php/conf.d/98-ddtrace.ini,
/usr/local/etc/php/conf.d/docker-php-ext-bcmath.ini,
/usr/local/etc/php/conf.d/docker-php-ext-gd.ini,
/usr/local/etc/php/conf.d/docker-php-ext-intl.ini,
/usr/local/etc/php/conf.d/docker-php-ext-pdo_pgsql.ini,
/usr/local/etc/php/conf.d/docker-php-ext-sodium.ini,
/usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini,
/usr/local/etc/php/conf.d/docker-php-ext-xsl.ini,
/usr/local/etc/php/conf.d/docker-php-ext-zip.ini

PHP API => 20250925
PHP Extension => 20250925
Zend Extension => 420250925
Zend Extension Build => API420250925,TS
PHP Extension Build => API20250925,TS
PHP Integer Size => 64 bits
Debug Build => no
Thread Safety => enabled
Thread API => POSIX Threads
Zend Signal Handling => disabled
Zend Memory Manager => disabled
Zend Multibyte Support => provided by mbstring
Zend Max Execution Timers => enabled
IPv6 Support => enabled
DTrace Support => disabled

Registered PHP Streams => https, ftps, compress.zlib, php, file, glob, data, http, ftp, phar, zip
Registered Stream Socket Transports => tcp, udp, unix, udg, ssl, tls, tlsv1.0, tlsv1.1, tlsv1.2, tlsv1.3
Registered Stream Filters => zlib.*, convert.iconv.*, string.rot13, string.toupper, string.tolower, convert.*, consumed, dechunk

This program makes use of the Zend Scripting Language Engine:
Zend Engine v4.5.2, Copyright (c) Zend Technologies
    with Xdebug v3.5.0, Copyright (c) 2002-2025, by Derick Rethans
    with Zend OPcache v8.5.2, Copyright (c), by Zend Technologies
    with ddtrace v1.15.2, Copyright Datadog, by Datadog
    with datadog-profiling v1.15.2, Copyright Datadog, by Datadog
    with ddappsec v1.15.2, Copyright Datadog, by Datadog


 _______________________________________________________________________


Configuration

bcmath

BCMath support => enabled

Directive => Local Value => Master Value
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Core

PHP Version => 8.5.2

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ddappsec


Datadog PHP AppSec extension
(c) Datadog 2021

State managed by remote config => Yes
Current state => Not configured
Version => 1.15.2
Connected to helper? => No

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ddtrace


Datadog PHP tracer extension
For help, check out the documentation at https://docs.datadoghq.com/tracing/languages/php/
(c) Datadog 2020

Datadog tracing support => enabled
Version => 1.15.2
DATADOG TRACER CONFIGURATION => {
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datadog[Removed...]

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ZIP-based phar archives => enabled
gzip compression => enabled
bzip2 compression => disabled (install ext/bz2)
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Phar based on pear/PHP_Archive, original concept by Davey Shafik.
Phar fully realized by Gregory Beaver and Marcus Boerger.
Portions of tar implementation Copyright (c) 2003-2009 Tim Kientzle.
Directive => Local Value => Master Value
phar.cache_list => no value => no value
phar.readonly => On => On
phar.require_hash => On => On

posix

POSIX support => enabled

random

Version => 8.5.2

readline

Readline Support => enabled
Readline library => 8.2

Directive => Local Value => Master Value
cli.pager => no value => no value
cli.prompt => \b \>  => \b \> 

Reflection

Reflection => enabled

session

Session Support => enabled
Registered save handlers => files user 
Registered serializer handlers => php_serialize php php_binary 

Directive => Local Value => Master Value
session.auto_start => Off => Off
session.cache_expire => 180 => 180
session.cache_limiter => nocache => nocache
session.cookie_domain => no value => no value
session.cookie_httponly => Off => Off
session.cookie_lifetime => 0 => 0
session.cookie_partitioned => Off => Off
session.cookie_path => / => /
session.cookie_samesite => no value => no value
session.cookie_secure => Off => Off
session.gc_divisor => 1000 => 1000
session.gc_maxlifetime => 1440 => 1440
session.gc_probability => 1 => 1
session.lazy_write => On => On
session.name => PHPSESSID => PHPSESSID
session.referer_check => no value => no value
session.save_handler => files => files
session.save_path => no value => no value
session.serialize_handler => php => php
session.sid_bits_per_character => 4 => 4
session.sid_length => 32 => 32
session.upload_progress.cleanup => On => On
session.upload_progress.enabled => On => On
session.upload_progress.freq => 1% => 1%
session.upload_progress.min_freq => 1 => 1
session.upload_progress.name => PHP_SESSION_UPLOAD_PROGRESS => PHP_SESSION_UPLOAD_PROGRESS
session.upload_progress.prefix => upload_progress_ => upload_progress_
session.use_cookies => On => On
session.use_only_cookies => On => On
session.use_strict_mode => Off => Off
session.use_trans_sid => Off => Off

SimpleXML

SimpleXML support => enabled
Schema support => enabled

sodium

sodium support => enabled
libsodium headers version => 1.0.18
libsodium library version => 1.0.18

SPL

SPL support => enabled
Interfaces => OuterIterator, RecursiveIterator, SeekableIterator, SplObserver, SplSubject
Classes => AppendIterator, ArrayIterator, ArrayObject, BadFunctionCallException, BadMethodCallException, CachingIterator, CallbackFilterIterator, DirectoryIterator, DomainException, EmptyIterator, FilesystemIterator, FilterIterator, GlobIterator, InfiniteIterator, InvalidArgumentException, IteratorIterator, LengthException, LimitIterator, LogicException, MultipleIterator, NoRewindIterator, OutOfBoundsException, OutOfRangeException, OverflowException, ParentIterator, RangeException, RecursiveArrayIterator, RecursiveCachingIterator, RecursiveCallbackFilterIterator, RecursiveDirectoryIterator, RecursiveFilterIterator, RecursiveIteratorIterator, RecursiveRegexIterator, RecursiveTreeIterator, RegexIterator, RuntimeException, SplDoublyLinkedList, SplFileInfo, SplFileObject, SplFixedArray, SplHeap, SplMinHeap, SplMaxHeap, SplObjectStorage, SplPriorityQueue, SplQueue, SplStack, SplTempFileObject, UnderflowException, UnexpectedValueException

sqlite3

SQLite3 support => enabled
SQLite Library => 3.40.1

Directive => Local Value => Master Value
sqlite3.defensive => On => On
sqlite3.extension_dir => no value => no value

standard

Dynamic Library Support => enabled
Path to sendmail => /usr/sbin/sendmail -t -i

Directive => Local Value => Master Value
assert.active => On => On
assert.bail => Off => Off
assert.callback => no value => no value
assert.exception => On => On
assert.warning => On => On
auto_detect_line_endings => Off => Off
default_socket_timeout => 60 => 60
from => no value => no value
session.trans_sid_hosts => no value => no value
session.trans_sid_tags => a=href,area=href,frame=src,form= => a=href,area=href,frame=src,form=
unserialize_max_depth => 4096 => 4096
url_rewriter.hosts => no value => no value
url_rewriter.tags => form= => form=
user_agent => no value => no value

tokenizer

Tokenizer Support => enabled

uri

URI support => active
uriparser bundled version => 1.0.0

xdebug

__   __   _      _                 
\ \ / /  | |    | |                
 \ V / __| | ___| |__  _   _  __ _ 
  > < / _` |/ _ \ '_ \| | | |/ _` |
 / . \ (_| |  __/ |_) | |_| | (_| |
/_/ \_\__,_|\___|_.__/ \__,_|\__, |
                              __/ |
                             |___/ 

Version => 3.5.0
Support Xdebug on Patreon, GitHub, or as a business: https://xdebug.org/support

          Enabled Features (through 'XDEBUG_MODE' env variable)          
Feature => Enabled/Disabled
Development Helpers => ✘ disabled
Coverage => ✘ disabled
GC Stats => ✘ disabled
Profiler => ✘ disabled
Step Debugger => ✔ enabled
Tracing => ✘ disabled

                            Optional Features                            
Compressed File Support => no
Clock Source => clock_gettime
TSC Clock Source => unavailable
'xdebug://gateway' pseudo-host support => yes
'xdebug://nameserver' pseudo-host support => yes
Systemd Private Temp Directory => not enabled

Debugger => enabled
IDE Key => PHPSTORM

Directive => Local Value => Master Value
xdebug.auto_trace => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.cli_color => 0 => 0
xdebug.client_discovery_header => HTTP_X_FORWARDED_FOR,REMOTE_ADDR => HTTP_X_FORWARDED_FOR,REMOTE_ADDR
xdebug.client_host => host.docker.internal => localhost
xdebug.client_port => 9003 => 9003
xdebug.cloud_id => no value => no value
xdebug.collect_assignments => Off => Off
xdebug.collect_includes => (setting removed in Xdebug 3) => (setting removed in Xdebug 3)
xdebug.collect_params => On => On
xdebug.collect_return => Off => Off
xdebug.collect_vars => (setting removed in Xdebug 3) => (setting removed in Xdebug 3)
xdebug.connect_timeout_ms => 200 => 200
xdebug.control_socket => off => off
xdebug.coverage_enable => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.default_enable => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.discover_client_host => Off => Off
xdebug.dump.COOKIE => no value => no value
xdebug.dump.ENV => no value => no value
xdebug.dump.FILES => no value => no value
xdebug.dump.GET => no value => no value
xdebug.dump.POST => no value => no value
xdebug.dump.REQUEST => no value => no value
xdebug.dump.SERVER => no value => no value
xdebug.dump.SESSION => no value => no value
xdebug.dump_globals => On => On
xdebug.dump_once => On => On
xdebug.dump_undefined => Off => Off
xdebug.file_link_format => no value => no value
xdebug.filename_format => no value => no value
xdebug.force_display_errors => Off => Off
xdebug.force_error_reporting => 0 => 0
xdebug.gc_stats_enable => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.gc_stats_output_dir => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.gc_stats_output_name => gcstats.%p => gcstats.%p
xdebug.halt_level => 0 => 0
xdebug.idekey => PHPSTORM => no value
xdebug.log => no value => no value
xdebug.log_level => 7 => 7
xdebug.max_nesting_level => 512 => 512
xdebug.max_stack_frames => -1 => -1
xdebug.mode => no value => no value
xdebug.output_dir => /tmp => /tmp
xdebug.overload_var_dump => (setting removed in Xdebug 3) => (setting removed in Xdebug 3)
xdebug.path_mapping => 0 => 0
xdebug.profiler_append => Off => Off
xdebug.profiler_enable => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.profiler_enable_trigger => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.profiler_enable_trigger_value => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.profiler_output_dir => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.profiler_output_name => cachegrind.out.%p => cachegrind.out.%p
xdebug.remote_autostart => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.remote_connect_back => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.remote_enable => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.remote_host => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.remote_log => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.remote_log_level => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.remote_mode => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.remote_port => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.remote_timeout => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.scream => Off => Off
xdebug.show_error_trace => Off => Off
xdebug.show_exception_trace => Off => Off
xdebug.show_local_vars => Off => Off
xdebug.show_mem_delta => (setting removed in Xdebug 3) => (setting removed in Xdebug 3)
xdebug.start_upon_error => default => default
xdebug.start_with_request => default => default
xdebug.trace_enable_trigger => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.trace_enable_trigger_value => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.trace_format => 0 => 0
xdebug.trace_options => 0 => 0
xdebug.trace_output_dir => (setting renamed in Xdebug 3) => (setting renamed in Xdebug 3)
xdebug.trace_output_name => trace.%c => trace.%c
xdebug.trigger_value => no value => no value
xdebug.use_compression => 0 => 0
xdebug.var_display_max_children => 128 => 128
xdebug.var_display_max_data => 512 => 512
xdebug.var_display_max_depth => 3 => 3

xml

XML Support => active
XML Namespace Support => active
libxml2 Version => 2.9.14

xmlreader

XMLReader => enabled

xmlwriter

XMLWriter => enabled

xsl

XSL => enabled
libxslt Version => 1.1.35
libxslt compiled against libxml Version => 2.9.14
EXSLT => enabled
libexslt Version => 0.8.20

Zend OPcache

Opcode Caching => Up and Running
Optimization => Disabled
SHM Cache => Enabled
File Cache => Disabled
JIT => Disabled
Startup => OK
Shared memory model => mmap
Cache hits => 0
Cache misses => 0
Used memory => 26727656
Free memory => 107490072
Wasted memory => 0
Interned Strings Used memory => 4652864
Interned Strings Free memory => 20512960
Cached scripts => 0
Cached keys => 0
Max keys => 32531
OOM restarts => 0
Hash keys restarts => 0
Manual restarts => 0
Start time => 2026-01-22T14:26:08+0000
Last restart time => none
Last force restart time => none

Directive => Local Value => Master Value
opcache.blacklist_filename => no value => no value
opcache.dups_fix => Off => Off
opcache.enable => On => On
opcache.enable_cli => On => On
opcache.enable_file_override => Off => Off
opcache.error_log => no value => no value
opcache.file_cache => no value => no value
opcache.file_cache_consistency_checks => On => On
opcache.file_cache_only => Off => Off
opcache.file_cache_read_only => Off => Off
opcache.file_update_protection => 2 => 2
opcache.force_restart_timeout => 180 => 180
opcache.huge_code_pages => Off => Off
opcache.interned_strings_buffer => 24 => 24
opcache.jit => disable => disable
opcache.jit_bisect_limit => 0 => 0
opcache.jit_blacklist_root_trace => 16 => 16
opcache.jit_blacklist_side_trace => 8 => 8
opcache.jit_buffer_size => 64M => 64M
opcache.jit_debug => 0 => 0
opcache.jit_hot_func => 127 => 127
opcache.jit_hot_loop => 61 => 61
opcache.jit_hot_return => 8 => 8
opcache.jit_hot_side_exit => 8 => 8
opcache.jit_max_exit_counters => 8192 => 8192
opcache.jit_max_loop_unrolls => 8 => 8
opcache.jit_max_polymorphic_calls => 2 => 2
opcache.jit_max_recursive_calls => 2 => 2
opcache.jit_max_recursive_returns => 2 => 2
opcache.jit_max_root_traces => 1024 => 1024
opcache.jit_max_side_traces => 128 => 128
opcache.jit_max_trace_length => 1024 => 1024
opcache.jit_prof_threshold => 0.005 => 0.005
opcache.lockfile_path => /tmp => /tmp
opcache.log_verbosity_level => 1 => 1
opcache.max_accelerated_files => 20000 => 20000
opcache.max_file_size => 0 => 0
opcache.max_wasted_percentage => 5 => 5
opcache.memory_consumption => 128 => 128
opcache.opt_debug_level => 0 => 0
opcache.optimization_level => 0 => 0x7FFEBFFF
opcache.preferred_memory_model => no value => no value
opcache.preload => no value => no value
opcache.preload_user => no value => no value
opcache.protect_memory => Off => Off
opcache.record_warnings => Off => Off
opcache.restrict_api => no value => no value
opcache.revalidate_freq => 2 => 2
opcache.revalidate_path => Off => Off
opcache.save_comments => On => On
opcache.use_cwd => On => On
opcache.validate_permission => Off => Off
opcache.validate_root => Off => Off
opcache.validate_timestamps => On => On

zip

Zip => enabled
Zip version => 1.22.7
Libzip version => 1.7.3
BZIP2 compression => Yes
XZ compression => No
ZSTD compression => No
AES-128 encryption => Yes
AES-192 encryption => Yes
AES-256 encryption => Yes

zlib

ZLib Support => enabled
Stream Wrapper => compress.zlib://
Stream Filter => zlib.inflate, zlib.deflate
Compiled Version => 1.2.13
Linked Version => 1.2.13

Directive => Local Value => Master Value
zlib.output_compression => Off => Off
zlib.output_compression_level => -1 => -1
zlib.output_handler => no value => no value

Additional Modules

Module Name

Environment

Variable => Value
HOSTNAME => 5b663fc7c974
PHP_INI_DIR => /usr/local/etc/php
HOME => /root
GODEBUG => cgocheck=0
XDEBUG_CONFIG => client_host=host.docker.internal
PHP_LDFLAGS => -Wl,-O1 -pie
PHP_CFLAGS => -fstack-protector-strong -fpic -fpie -O2 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64
PHP_VERSION => 8.5.2
GPG_KEYS => 1198C0117593497A5EC5C199286AF1F9897469DC 49D9AF6BC72A80D6691719C8AA23F5BE9C7097D4 D95C03BC702BE9515344AE3374E44BC9067701A5
PHP_CPPFLAGS => -fstack-protector-strong -fpic -fpie -O2 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64
PHP_ASC_URL => https://www.php.net/distributions/php-8.5.2.tar.xz.asc
COMPOSER_ALLOW_SUPERUSER => 1
PHP_URL => https://www.php.net/distributions/php-8.5.2.tar.xz
TERM => xterm
XDEBUG_MODE => debug
PATH => /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
XDG_CONFIG_HOME => /config
XDG_DATA_HOME => /data
APP_ENV_NAME => local
PHPIZE_DEPS => autoconf                 dpkg-dev                file            g++             gcc             libc-dev                make            pkg-config              re2c
APP_ENV => dev
PWD => /app
PHP_SHA256 => cb75a9b00a2806f7390dd64858ef42a47b443b3475769c8af6af33a18b1381f1
SERVER_PORT => 80
LOG_MODE => file
SERVER_NAME => :80

PHP Variables

Variable => Value
$_SERVER['HOSTNAME'] => 5b663fc7c974
$_SERVER['PHP_INI_DIR'] => /usr/local/etc/php
$_SERVER['HOME'] => /root
$_SERVER['GODEBUG'] => cgocheck=0
$_SERVER['XDEBUG_CONFIG'] => client_host=host.docker.internal
$_SERVER['PHP_LDFLAGS'] => -Wl,-O1 -pie
$_SERVER['PHP_CFLAGS'] => -fstack-protector-strong -fpic -fpie -O2 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64
$_SERVER['PHP_VERSION'] => 8.5.2
$_SERVER['GPG_KEYS'] => 1198C0117593497A5EC5C199286AF1F9897469DC 49D9AF6BC72A80D6691719C8AA23F5BE9C7097D4 D95C03BC702BE9515344AE3374E44BC9067701A5
$_SERVER['PHP_CPPFLAGS'] => -fstack-protector-strong -fpic -fpie -O2 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64
$_SERVER['PHP_ASC_URL'] => https://www.php.net/distributions/php-8.5.2.tar.xz.asc
$_SERVER['COMPOSER_ALLOW_SUPERUSER'] => 1
$_SERVER['PHP_URL'] => https://www.php.net/distributions/php-8.5.2.tar.xz
$_SERVER['TERM'] => xterm
$_SERVER['XDEBUG_MODE'] => debug
$_SERVER['PATH'] => /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
$_SERVER['XDG_CONFIG_HOME'] => /config
$_SERVER['XDG_DATA_HOME'] => /data
$_SERVER['APP_ENV_NAME'] => local
$_SERVER['PHPIZE_DEPS'] => autoconf             dpkg-dev                file            g++             gcc             libc-dev                make            pkg-config            re2c
$_SERVER['APP_ENV'] => dev
$_SERVER['PWD'] => /app
$_SERVER['PHP_SHA256'] => cb75a9b00a2806f7390dd64858ef42a47b443b3475769c8af6af33a18b1381f1
$_SERVER['SERVER_PORT'] => 80
$_SERVER['LOG_MODE'] => file
$_SERVER['SERVER_NAME'] => :80
$_SERVER['PHP_SELF'] => 
$_SERVER['SCRIPT_NAME'] => 
$_SERVER['SCRIPT_FILENAME'] => 
$_SERVER['PATH_TRANSLATED'] => 
$_SERVER['DOCUMENT_ROOT'] => 
$_SERVER['REQUEST_TIME_FLOAT'] => 1769091968.6422
$_SERVER['REQUEST_TIME'] => 1769091968

Relevant log output

/root/go/pkg/mod/github.com/caddyserver/caddy/v2@v2.10.2/cmd/cobra.go:141 +0x34 fp=0x4000679c30 sp=0x4000679be0 pc=0xaf2f34

github.com/spf13/cobra.(*Command).execute(0x40007d0308, {0x400011f830, 0x3, 0x3})

	/root/go/pkg/mod/github.com/spf13/cobra@v1.10.2/command.go:1015 +0x7d4 fp=0x4000679de0 sp=0x4000679c30 pc=0x600734

github.com/spf13/cobra.(*Command).ExecuteC(0x400020db08)

	/root/go/pkg/mod/github.com/spf13/cobra@v1.10.2/command.go:1148 +0x350 fp=0x4000679ed0 sp=0x4000679de0 pc=0x600eb0

github.com/spf13/cobra.(*Command).Execute(...)

	/root/go/pkg/mod/github.com/spf13/cobra@v1.10.2/command.go:1071

github.com/caddyserver/caddy/v2/cmd.Main()

	/root/go/pkg/mod/github.com/caddyserver/caddy/v2@v2.10.2/cmd/main.go:72 +0x6c fp=0x4000679f30 sp=0x4000679ed0 pc=0xaec06c

main.main()

	/go/src/app/caddy/frankenphp/main.go:15 +0x1c fp=0x4000679f40 sp=0x4000679f30 pc=0x16440bc

runtime.main()

	/usr/local/go/src/runtime/proc.go:285 +0x278 fp=0x4000679fd0 sp=0x4000679f40 pc=0x44c9f8

runtime.goexit({})

	/usr/local/go/src/runtime/asm_arm64.s:1268 +0x4 fp=0x4000679fd0 sp=0x4000679fd0 pc=0x48b4e4


goroutine 17 gp=0x4000002700 m=nil [chan receive, locked to thread]:

runtime.gopark(0x400009c008?, 0x40006c2680?, 0x18?, 0xad?, 0x485ac4?)

	/usr/local/go/src/runtime/proc.go:460 +0xc0 fp=0x40000aacd0 sp=0x40000aacb0 pc=0x482e60

runtime.chanrecv(0x40000ce460, 0x0, 0x1)

	/usr/local/go/src/runtime/chan.go:667 +0x428 fp=0x40000aad50 sp=0x40000aacd0 pc=0x416f28

runtime.chanrecv1(0x40002fe130?, 0x0?)

	/usr/local/go/src/runtime/chan.go:509 +0x14 fp=0x40000aad80 sp=0x40000aad50 pc=0x416ac4

github.com/dunglas/frankenphp/internal/state.(*ThreadState).WaitFor(0x40002fe120, {0x4000062e80, 0x1, 0x1})

	/go/src/app/internal/state/state.go:129 +0x19c fp=0x40000aae00 sp=0x40000aad80 pc=0x142945c

github.com/dunglas/frankenphp.go_frankenphp_main_thread_is_ready()

	/go/src/app/phpmainthread.go:152 +0x94 fp=0x40000aae30 sp=0x40000aae00 pc=0x153aa64

_cgoexp_634fea83287e_go_frankenphp_main_thread_is_ready(0x40000aae98?)

	_cgo_gotypes.go:2061 +0x1c fp=0x40000aae40 sp=0x40000aae30 pc=0x15418fc

runtime.cgocallbackg1(0x15418e0, 0xffff457ae3f0, 0x0)

	/usr/local/go/src/runtime/cgocall.go:446 +0x248 fp=0x40000aaf10 sp=0x40000aae40 pc=0x414f68

runtime.cgocallbackg(0x15418e0, 0xffff457ae3f0, 0x0)

	/usr/local/go/src/runtime/cgocall.go:350 +0x104 fp=0x40000aaf80 sp=0x40000aaf10 pc=0x414c54

runtime.cgocallbackg(0x15418e0, 0xffff457ae3f0, 0x0)

	<autogenerated>:1 +0x1c fp=0x40000aafb0 sp=0x40000aaf80 pc=0x48d4ac

runtime.cgocallback(0x0, 0x0, 0x0)

	/usr/local/go/src/runtime/asm_arm64.s:1180 +0xb0 fp=0x40000aafe0 sp=0x40000aafb0 pc=0x48b400

runtime.goexit({})

	/usr/local/go/src/runtime/asm_arm64.s:1268 +0x4 fp=0x40000aafe0 sp=0x40000aafe0 pc=0x48b4e4

[...]

Too long

[AlliBalliBaba]

This crash is unlikely to be linked to anything happening on the go side. Are you also seeing the crash when disabling Xdebug? There have been similar issues with Xdebug in the past, could be that they are re-appearing in the 3.5 version.

Could you also share the full log output, might help even if it's long.

[withinboredom]

Hmm. I can't reproduce on amd64 but I can on my Mac. So, this is probably specific to arm.

I have no idea (yet) how we are still handling requests after we have shutdown php.