Stack smash error on Linux when using libevent

[uilianries]

Hello!

Description

When building and consuming pistache 0.4.26 on Linux Ubuntu 24.04 using its GCC13, and trying to consume the produced library using a simple validation, I have a stack smash error, like:

/test_package
*** stack smashing detected ***: terminated
Aborted (core dumped)

Environment

OS: GNU/Linux 6.8.0-60-generic
Distro: Ubuntu 24.04.1 LTS
Compiler: gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
CPU Architecture: x86_64
Build Type: Release and Debug (same error on both)

Pistache version: 0.4.26 (https://github.com/pistacheio/pistache/archive/refs/tags/v0.4.26.tar.gz)
Meson version: 1.7.2
libevent version: 2.1.12
OpenSSL version: 3.5.1
rapidjson version: 1.1.0

Steps to reproduce

First, we build Pistache as usual:

wget https://github.com/pistacheio/pistache/archive/refs/tags/v0.4.26.tar.gz
tar zxf v0.4.26.tar.gz
cd pistache-0.4.26/
mkdir build && cd build/
meson setup .. -DPISTACHE_USE_SSL=true -DPISTACHE_USE_RAPIDJSON=true -DPISTACHE_FORCE_LIBEVENT=true --prefix=/tmp/pistache/install --default-library=static
meson compile
meson install

Then, we consume using a simple example:

#include "pistache/endpoint.h"

using namespace Pistache;

class HelloHandler : public Http::Handler {
public:

    HTTP_PROTOTYPE(HelloHandler)

    void onRequest(const Http::Request& request, Http::ResponseWriter response) override{
        response.send(Pistache::Http::Code::Ok, "Hello World\n");
    }
};

int main() {
    Pistache::Address addr(Pistache::Ipv4::any(), Pistache::Port(9080));
    auto opts = Pistache::Http::Endpoint::options()
        .threads(1);

    Http::Endpoint server(addr);
    server.init(opts);
    server.setHandler(Http::make_handler<HelloHandler>());
    server.shutdown();

	return 0;
}

And build it as simple as possible:

g++ example.cpp -o example -std=c++17 -I/tmp/pistache/install/include /tmp/pistache/install/lib/x86_64-linux-gnu/libpistache.a -lssl -lcrypto -levent -levent_pthreads -lpthread

Details

My current build log:

Details

• wget https://github.com/pistacheio/pistache/archive/refs/tags/v0.4.26.tar.gz
  --2025-07-23 10:32:29-- https://github.com/pistacheio/pistache/archive/refs/tags/v0.4.26.tar.gz
  Resolving github.com (github.com)... 140.82.121.4
  Connecting to github.com (github.com)|140.82.121.4|:443... connected.
  HTTP request sent, awaiting response... 302 Found
  Location: https://codeload.github.com/pistacheio/pistache/tar.gz/refs/tags/v0.4.26 [following]
  --2025-07-23 10:32:29-- https://codeload.github.com/pistacheio/pistache/tar.gz/refs/tags/v0.4.26
  Resolving codeload.github.com (codeload.github.com)... 140.82.121.9
  Connecting to codeload.github.com (codeload.github.com)|140.82.121.9|:443... connected.
  HTTP request sent, awaiting response... 200 OK
  Length: unspecified [application/x-gzip]
  Saving to: 'v0.4.26.tar.gz'

  0K .......... .......... .......... .......... .......... 946K
  50K .......... .......... .......... .......... .......... 2.13M
  100K .......... .......... .......... .......... .......... 22.9M
  150K .......... .......... .......... .......... .......... 2.02M
  200K .......... .......... .......... .......... .......... 17.4M
  250K .......... .......... .......... .......... .......... 19.4M
  300K .......... .......... .......... .......... .......... 6.60M
  350K .......... .......... .......... .......... .......... 3.62M
  400K .......... .......... .......... .......... .......... 15.5M
  450K .......... .......... .......... .......... .......... 30.7M
  500K .......... .......... .......... .......... .......... 31.3M
  550K .......... .......... .......... .......... .......... 32.3M
  600K .......... .......... .......... ...... 11.6M=0.1s

2025-07-23 10:32:30 (4.47 MB/s) - 'v0.4.26.tar.gz' saved [651892]

• tar zxf v0.4.26.tar.gz
• cd pistache-0.4.26/
• mkdir build
• cd build/
• meson setup .. -DPISTACHE_USE_SSL=true -DPISTACHE_USE_RAPIDJSON=true -DPISTACHE_FORCE_LIBEVENT=true --prefix=/tmp/pistache/install --default-library=static
  The Meson build system
  Version: 1.3.2
  Source dir: /tmp/build/pistache-0.4.26
  Build dir: /tmp/build/pistache-0.4.26/build
  Build type: native build
  Project name: pistache
  Project version: 0.3.0
  C++ compiler for the host machine: c++ (gcc 13.3.0 "c++ (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0")
  C++ linker for the host machine: c++ ld.bfd 2.42
  Host machine cpu family: x86_64
  Host machine cpu: x86_64
  Compiler for C++ supports arguments -Wconversion: YES
  Compiler for C++ supports arguments -Wno-sign-conversion: YES
  Compiler for C++ supports arguments -Wno-missing-field-initializers: YES
  Run-time dependency threads found: YES
  Checking if "C++20 std::chrono" compiles: NO
  Found pkg-config: YES (/usr/bin/pkg-config) 1.8.1
  Found CMake: /usr/bin/cmake (3.28.3)
  Run-time dependency howardhinnant-date found: NO (tried pkgconfig and cmake)
  Run-time dependency hinnant-date found: NO (tried pkgconfig and cmake)
  Run-time dependency date found: NO (tried pkgconfig and cmake)
  Looking for a fallback subproject for the dependency date

Executing subproject hinnant-date

hinnant-date| Project name: hinnant-date
hinnant-date| Project version: 3.0.1
hinnant-date| C++ compiler for the host machine: c++ (gcc 13.3.0 "c++ (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0")
hinnant-date| C++ linker for the host machine: c++ ld.bfd 2.42
hinnant-date| Build targets in project: 0
hinnant-date| Subproject hinnant-date finished.

Dependency date from subproject subprojects/hinnant-date found: YES 3.0.1
Run-time dependency rapidjson found: NO (tried pkgconfig and cmake)
Looking for a fallback subproject for the dependency RapidJSON
Downloading rapidjson source from https://github.com/Tencent/rapidjson/archive/v1.1.0.tar.gz
Downloading file of unknown size.
Downloading rapidjson patch from https://wrapdb.mesonbuild.com/v2/rapidjson_1.1.0-2/get_patch

Executing subproject rapidjson

rapidjson| Project name: rapidjson
rapidjson| Project version: 1.1.0
rapidjson| C++ compiler for the host machine: c++ (gcc 13.3.0 "c++ (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0")
rapidjson| C++ linker for the host machine: c++ ld.bfd 2.42
rapidjson| Build targets in project: 0
rapidjson| Subproject rapidjson finished.

Dependency RapidJSON from subproject subprojects/rapidjson-1.1.0 found: YES 1.1.0
Checking if "std::atomic" : links: YES
Checking if "std::atomic<uint64_t>" : links: YES
Run-time dependency openssl found: YES 3.0.13
Run-time dependency libevent found: YES 2.1.12-stable
Run-time dependency libevent_pthreads found: YES 2.1.12-stable
Run-time dependency dl found: YES
Configuring version.h using configuration
Program git found: YES (/usr/bin/git)
Build targets in project: 1
NOTICE: Future-deprecated features used:

• 0.56.0: {'meson.source_root'}

pistache 0.3.0

Subprojects
hinnant-date : YES
rapidjson : YES

User defined options
default_library : static
prefix : /tmp/pistache/install
PISTACHE_FORCE_LIBEVENT: true
PISTACHE_USE_RAPIDJSON : true
PISTACHE_USE_SSL : true

Found ninja-1.11.1 at /usr/bin/ninja

• meson compile
  [1/37] Compiling C++ object src/libpistache.a.p/common_pist_clock_gettime.cc.o
  [2/37] Compiling C++ object src/libpistache.a.p/common_pist_fcntl.cc.o
  [3/37] Compiling C++ object src/libpistache.a.p/common_pist_filefns.cc.o
  [4/37] Compiling C++ object src/libpistache.a.p/common_pist_sockfns.cc.o
  [5/37] Compiling C++ object src/libpistache.a.p/common_pist_check.cc.o
  [6/37] Compiling C++ object src/libpistache.a.p/common_pist_ifaddrs.cc.o
  [7/37] Compiling C++ object src/libpistache.a.p/common_pist_resource.cc.o
  [8/37] Compiling C++ object src/libpistache.a.p/common_net.cc.o
  [9/37] Compiling C++ object src/libpistache.a.p/common_base64.cc.o
  [10/37] Compiling C++ object src/libpistache.a.p/common_pist_strerror_r.cc.o
  [11/37] Compiling C++ object src/libpistache.a.p/common_ps_basename.cc.o
  [12/37] Compiling C++ object src/libpistache.a.p/common_os.cc.o
  [13/37] Compiling C++ object src/libpistache.a.p/common_pist_syslog.cc.o
  [14/37] Compiling C++ object src/libpistache.a.p/common_ps_sendfile.cc.o
  [15/37] Compiling C++ object src/libpistache.a.p/common_ps_strl.cc.o
  [16/37] Compiling C++ object src/libpistache.a.p/common_pist_timelog.cc.o
  [17/37] Compiling C++ object src/libpistache.a.p/common_string_logger.cc.o
  [18/37] Compiling C++ object src/libpistache.a.p/common_cookie.cc.o
  [19/37] Compiling C++ object src/libpistache.a.p/common_stream.cc.o
  [20/37] Compiling C++ object src/libpistache.a.p/common_eventmeth.cc.o
  [21/37] Compiling C++ object src/libpistache.a.p/common_mime.cc.o
  [22/37] Compiling C++ object src/libpistache.a.p/common_timer_pool.cc.o
  [23/37] Compiling C++ object src/libpistache.a.p/common_peer.cc.o
  [24/37] Compiling C++ object src/libpistache.a.p/common_http_headers.cc.o
  [25/37] Compiling C++ object src/libpistache.a.p/common_http_header.cc.o
  [26/37] Compiling C++ object src/libpistache.a.p/common_tcp.cc.o
  [27/37] Compiling C++ object src/libpistache.a.p/common_reactor.cc.o
  [28/37] Compiling C++ object src/libpistache.a.p/common_utils.cc.o
  [29/37] Compiling C++ object src/libpistache.a.p/common_http_defs.cc.o
  [30/37] Compiling C++ object src/libpistache.a.p/common_description.cc.o
  [31/37] Compiling C++ object src/libpistache.a.p/server_endpoint.cc.o
  [32/37] Compiling C++ object src/libpistache.a.p/common_http.cc.o
  [33/37] Compiling C++ object src/libpistache.a.p/common_transport.cc.o
  [34/37] Compiling C++ object src/libpistache.a.p/server_listener.cc.o
  [35/37] Compiling C++ object src/libpistache.a.p/client_client.cc.o
  [36/37] Compiling C++ object src/libpistache.a.p/server_router.cc.o
  [37/37] Linking static target src/libpistache.a
  INFO: autodetecting backend as ninja
  INFO: calculating backend command to run: /usr/bin/ninja
• meson install
  ninja: Entering directory `/tmp/build/pistache-0.4.26/build'
  ninja: no work to do.
  Installing subdir /tmp/build/pistache-0.4.26/include/pistache/serializer to /tmp/pistache/install/include/pistache/serializer
  Installing /tmp/build/pistache-0.4.26/include/pistache/serializer/rapidjson.h to /tmp/pistache/install/include/pistache/serializer
  Installing src/libpistache.a to /tmp/pistache/install/lib/x86_64-linux-gnu
  Installing /tmp/build/pistache-0.4.26/include/pistache/async.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/base64.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/client.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/common.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/config.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/cookie.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/date_wrapper.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/description.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/em_socket_t.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/emosandlibevdefs.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/endpoint.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/eventmeth.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/errors.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/flags.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/http_defs.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/http.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/http_header.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/http_headers.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/iterator_adapter.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/listener.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/log.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/mailbox.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/mime.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/meta.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/net.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/os.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/peer.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/pist_check.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/pist_clock_gettime.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/pist_fcntl.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/pist_filefns.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/pist_ifaddrs.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/pist_quote.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/pist_resource.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/pist_sockfns.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/pist_strerror_r.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/pist_syslog.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/pist_timelog.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/prototype.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/ps_basename.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/ps_sendfile.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/ps_strl.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/pst_errno.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/reactor.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/route_bind.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/router.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/ssl_wrappers.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/stream.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/string_logger.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/tcp.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/timer_pool.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/transport.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/type_checkers.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/typeid.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/utils.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/view.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/include/pistache/winornix.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/build/include/pistache/version.h to /tmp/pistache/install/include/pistache
  Installing /tmp/build/pistache-0.4.26/build/meson-private/libpistache.pc to /tmp/pistache/install/lib/x86_64-linux-gnu/pkgconfig
• g++ example.cpp -o example -std=c++17 -I/tmp/pistache/install/include /tmp/pistache/install/lib/x86_64-linux-gnu/libpistache.a -lssl -lcrypto -levent -levent_pthreads -lpthread
• ./example
  *** stack smashing detected ***: terminated
  Aborted (core dumped)

[dgreatwood]

Thanks for the helpful report.

Unfortunately I am slammed in my day job right now and it may be some time before I can take a close look.

In the meantime, does the problem still occur without libevent? (i.e. don't DPISTACHE_FORCE_LIBEVENT=true on the build).

Do you have any / can you obtain an indication where the stack smashing occurs?

JFYI, the Pistache github workflow/CI does include some libevent-on-linux testing (see linuxflibev.yaml), which appears fine, so this problem is a little surprising - but of course it may be a real issue nonetheless.

Thanks again.

[uilianries]

@dgreatwood Hello and thank you for your quick answer!

In the meantime, does the problem still occur without libevent? (i.e. don't DPISTACHE_FORCE_LIBEVENT=true on the build).

No, it does not occur when using the option -DPISTACHE_FORCE_LIBEVENT=false;

The libevent used by me is the official one provided by Ubuntu 24.04:

https://packages.ubuntu.com/noble/libevent-dev

Do you have any / can you obtain an indication where the stack smashing occurs?

Yes, when building with -DPISTACHE_DEBUG=true --buildtype=debug, the example output is:

./example 
examp[1691]: (7a28e2583740 PSTCH) eventmeth.cc:776 in create(): <Ctr:1 Thu Jul 24 06:43:02 2025,766ms
examp[1691]: (7a28e2583740 PSTCH) eventmeth.cc:1250 in EventMethBase(): <<Ctr:2 Thu Jul 24 06:43:02 2025,766ms
examp[1691]: (7a28e2583740 PSTCH) eventmeth.cc:1259 in EventMethBase(): Locking event_meth_base_inited_previously_mutex (at 0x6290cdfc0300)
examp[1691]: (7a28e2583740 PSTCH) pist_check.cc:273 in ~GuardAndDbgLog(): event_meth_base_inited_previously_mutex (at 0x6290cdfc0300) unlocked, was locked eventmeth.cc:1259
examp[1691]: (7a28e2583740 PSTCH) eventmeth.cc:1250 in EventMethBase(): Thu Jul 24 06:43:02 2025,767ms diff=0.248ms ctr:2>>
examp[1691]: (7a28e2583740 PSTCH) eventmeth.cc:3368 in EventMethEpollEquivImpl(): <<Ctr:3 Thu Jul 24 06:43:02 2025,767ms
examp[1691]: (7a28e2583740 PSTCH) eventmeth.cc:3382 in EventMethEpollEquivImpl(): Locking emee_cptr_set_mutex_ (at 0x6290cdfc03c0)
examp[1691]: (7a28e2583740 PSTCH) pist_check.cc:273 in ~GuardAndDbgLog(): emee_cptr_set_mutex_ (at 0x6290cdfc03c0) unlocked, was locked eventmeth.cc:3382
examp[1691]: (7a28e2583740 PSTCH) eventmeth.cc:3368 in EventMethEpollEquivImpl(): Thu Jul 24 06:43:02 2025,767ms diff=0.070ms ctr:3>>
examp[1691]: (7a28e2583740 PSTCH) eventmeth.cc:776 in create(): Thu Jul 24 06:43:02 2025,767ms diff=0.531ms ctr:1>
examp[1691]: (7a28e2583740 PSTCH) eventmeth.cc:1047 in ~EventMethEpollEquiv(): <Ctr:4 Thu Jul 24 06:43:02 2025,767ms [Pistache::EventMethEpollEquiv (this) 0x6290eb3acbd0]
examp[1691]: (7a28e2583740 PSTCH) eventmeth.cc:3393 in ~EventMethEpollEquivImpl(): <<Ctr:5 Thu Jul 24 06:43:02 2025,767ms [Pistache::EventMethEpollEquivImpl (this) 0x6290eb3acbf0]
examp[1691]: (7a28e2583740 PSTCH) eventmeth.cc:4394 in eMBaseLoopbreak(): <<<Ctr:6 Thu Jul 24 06:43:02 2025,767ms
examp[1691]: (7a28e2583740 PSTCH) eventmeth.cc:4394 in eMBaseLoopbreak(): Thu Jul 24 06:43:02 2025,767ms diff=0.028ms ctr:6>>>
examp[1691]: (7a28e2583740 PSTCH) eventmeth.cc:3407 in ~EventMethEpollEquivImpl(): Locking emee_cptr_set_mutex_ (at 0x6290cdfc03c0)
examp[1691]: (7a28e2583740 PSTCH) eventmeth.cc:3410 in ~EventMethEpollEquivImpl(): Locking interest_mutex_ (at 0x6290eb3acc58)
examp[1691]: (7a28e2583740 PSTCH) eventmeth.cc:3422 in ~EventMethEpollEquivImpl(): Locking ready_mutex_ (at 0x6290eb3acc80)
examp[1691]: (7a28e2583740 PSTCH) eventmeth.cc:1297 in ~EventMethBase(): <<<Ctr:7 Thu Jul 24 06:43:02 2025,767ms [Pistache::EventMethBase (this) 0x6290eb3acce0]
examp[1691]: (7a28e2583740 PSTCH) eventmeth.cc:1297 in ~EventMethBase(): Thu Jul 24 06:43:02 2025,767ms diff=0.040ms ctr:7>>>
examp[1691]: (7a28e2583740 PSTCH) pist_check.cc:273 in ~GuardAndDbgLog(): ready_mutex_ (at 0x6290eb3acc80) unlocked, was locked eventmeth.cc:3422
examp[1691]: (7a28e2583740 PSTCH) pist_check.cc:273 in ~GuardAndDbgLog(): interest_mutex_ (at 0x6290eb3acc58) unlocked, was locked eventmeth.cc:3410
examp[1691]: (7a28e2583740 PSTCH) pist_check.cc:273 in ~GuardAndDbgLog(): emee_cptr_set_mutex_ (at 0x6290cdfc03c0) unlocked, was locked eventmeth.cc:3407
examp[1691]: (7a28e2583740 PSTCH) eventmeth.cc:3393 in ~EventMethEpollEquivImpl(): Thu Jul 24 06:43:02 2025,767ms diff=0.293ms ctr:5>>
examp[1691]: (7a28e2583740 PSTCH) eventmeth.cc:1047 in ~EventMethEpollEquiv(): Thu Jul 24 06:43:02 2025,767ms diff=0.348ms ctr:4>
*** stack smashing detected ***: terminated
Aborted (core dumped)

With gdb I can obtain a bit more information:

examp[1845]: (75e3ddf0b740 PSTCH) eventmeth.cc:776 in create(): <Ctr:1 Thu Jul 24 06:45:38 2025,314ms
examp[1845]: (75e3ddf0b740 PSTCH) eventmeth.cc:1250 in EventMethBase(): <<Ctr:2 Thu Jul 24 06:45:38 2025,314ms
examp[1845]: (75e3ddf0b740 PSTCH) eventmeth.cc:1259 in EventMethBase(): Locking event_meth_base_inited_previously_mutex (at 0x5d10dcafc300)
examp[1845]: (75e3ddf0b740 PSTCH) pist_check.cc:273 in ~GuardAndDbgLog(): event_meth_base_inited_previously_mutex (at 0x5d10dcafc300) unlocked, was locked eventmeth.cc:1259
examp[1845]: (75e3ddf0b740 PSTCH) eventmeth.cc:1250 in EventMethBase(): Thu Jul 24 06:45:38 2025,314ms diff=0.180ms ctr:2>>
examp[1845]: (75e3ddf0b740 PSTCH) eventmeth.cc:3368 in EventMethEpollEquivImpl(): <<Ctr:3 Thu Jul 24 06:45:38 2025,314ms
examp[1845]: (75e3ddf0b740 PSTCH) eventmeth.cc:3382 in EventMethEpollEquivImpl(): Locking emee_cptr_set_mutex_ (at 0x5d10dcafc3c0)
examp[1845]: (75e3ddf0b740 PSTCH) pist_check.cc:273 in ~GuardAndDbgLog(): emee_cptr_set_mutex_ (at 0x5d10dcafc3c0) unlocked, was locked eventmeth.cc:3382
examp[1845]: (75e3ddf0b740 PSTCH) eventmeth.cc:3368 in EventMethEpollEquivImpl(): Thu Jul 24 06:45:38 2025,314ms diff=0.106ms ctr:3>>
examp[1845]: (75e3ddf0b740 PSTCH) eventmeth.cc:776 in create(): Thu Jul 24 06:45:38 2025,314ms diff=0.566ms ctr:1>
examp[1845]: (75e3ddf0b740 PSTCH) eventmeth.cc:1047 in ~EventMethEpollEquiv(): <Ctr:4 Thu Jul 24 06:45:38 2025,315ms [Pistache::EventMethEpollEquiv (this) 0x5d11104fdbd0]
examp[1845]: (75e3ddf0b740 PSTCH) eventmeth.cc:3393 in ~EventMethEpollEquivImpl(): <<Ctr:5 Thu Jul 24 06:45:38 2025,315ms [Pistache::EventMethEpollEquivImpl (this) 0x5d11104fdbf0]
examp[1845]: (75e3ddf0b740 PSTCH) eventmeth.cc:4394 in eMBaseLoopbreak(): <<<Ctr:6 Thu Jul 24 06:45:38 2025,315ms
examp[1845]: (75e3ddf0b740 PSTCH) eventmeth.cc:4394 in eMBaseLoopbreak(): Thu Jul 24 06:45:38 2025,315ms diff=0.036ms ctr:6>>>
examp[1845]: (75e3ddf0b740 PSTCH) eventmeth.cc:3407 in ~EventMethEpollEquivImpl(): Locking emee_cptr_set_mutex_ (at 0x5d10dcafc3c0)
examp[1845]: (75e3ddf0b740 PSTCH) eventmeth.cc:3410 in ~EventMethEpollEquivImpl(): Locking interest_mutex_ (at 0x5d11104fdc58)
examp[1845]: (75e3ddf0b740 PSTCH) eventmeth.cc:3422 in ~EventMethEpollEquivImpl(): Locking ready_mutex_ (at 0x5d11104fdc80)
examp[1845]: (75e3ddf0b740 PSTCH) eventmeth.cc:1297 in ~EventMethBase(): <<<Ctr:7 Thu Jul 24 06:45:38 2025,315ms [Pistache::EventMethBase (this) 0x5d11104fdce0]
examp[1845]: (75e3ddf0b740 PSTCH) eventmeth.cc:1297 in ~EventMethBase(): Thu Jul 24 06:45:38 2025,315ms diff=0.059ms ctr:7>>>
examp[1845]: (75e3ddf0b740 PSTCH) pist_check.cc:273 in ~GuardAndDbgLog(): ready_mutex_ (at 0x5d11104fdc80) unlocked, was locked eventmeth.cc:3422
examp[1845]: (75e3ddf0b740 PSTCH) pist_check.cc:273 in ~GuardAndDbgLog(): interest_mutex_ (at 0x5d11104fdc58) unlocked, was locked eventmeth.cc:3410
examp[1845]: (75e3ddf0b740 PSTCH) pist_check.cc:273 in ~GuardAndDbgLog(): emee_cptr_set_mutex_ (at 0x5d10dcafc3c0) unlocked, was locked eventmeth.cc:3407
examp[1845]: (75e3ddf0b740 PSTCH) eventmeth.cc:3393 in ~EventMethEpollEquivImpl(): Thu Jul 24 06:45:38 2025,315ms diff=0.409ms ctr:5>>
examp[1845]: (75e3ddf0b740 PSTCH) eventmeth.cc:1047 in ~EventMethEpollEquiv(): Thu Jul 24 06:45:38 2025,315ms diff=0.483ms ctr:4>
*** stack smashing detected ***: terminated

Program received signal SIGABRT, Aborted.
0x000075e3ddfe3b2c in pthread_kill () from /lib/x86_64-linux-gnu/libc.so.6
(gdb) bt
#0  0x000075e3ddfe3b2c in pthread_kill () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x000075e3ddf8a27e in raise () from /lib/x86_64-linux-gnu/libc.so.6
#2  0x000075e3ddf6d8ff in abort () from /lib/x86_64-linux-gnu/libc.so.6
#3  0x000075e3ddf6e7b6 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#4  0x000075e3de07bc19 in __fortify_fail () from /lib/x86_64-linux-gnu/libc.so.6
#5  0x000075e3de07cea4 in __stack_chk_fail () from /lib/x86_64-linux-gnu/libc.so.6
#6  0x00005d10dc9b49fd in main ()

[dgreatwood]

Very helpful. At first glance, it looks like a problem of an event-loop instance being destroyed immediately after it was created, causing some kind of issue.

I will take a closer look as and when I have time.

Of course (I hope), you can use Pistache without libevent in the meantime.

Thanks.