Mutating Middleware context in CROW_CATCHALL_ROUTE causes Segmentation fault

[lbatuska]

When I try to modify a value contained in the context struct in a CROW_CATCHALL_ROUTE it causes a segfault but works perfectly with a CROW_ROUTE

A very minimal example to reproduce it:

struct TestMW {
  struct context {  // NOLINT(readability-identifier-naming)
    int id{};
    std::string s;
    context() : s("Test") {}
  };

  void before_handle(  // NOLINT(readability-convert-member-functions-to-static)
      crow::request& req,  // NOLINT(misc-unused-parameters)
      crow::response& res,
      context& ctx) {  // NOLINT(misc-unused-parameters)
  }

  void after_handle(  // NOLINT(readability-convert-member-functions-to-static)
      crow::request& req,   // NOLINT(misc-unused-parameters)
      crow::response& res,  // NOLINT(misc-unused-parameters)
      context& ctx          // NOLINT(misc-unused-parameters)
  ) {}
};

int main() {
  crow::App<TestMW> app;
  app.loglevel(crow::LogLevel::Debug);
  CROW_CATCHALL_ROUTE(app)
  ([&](crow::request const& req, crow::response& res) {
    auto& ctx = app.get_context<TestMW>(req);
    ctx.s = "Something else";
    res.write("Test Write");
    res.end();
  });

  app.port(8181).multithreaded().run();
}

When I run the following code and try curl-ing on any url on localhost:8181 I get the following on the server side:

(2024-07-27 19:19:54) [INFO    ] Crow/master server is running at http://0.0.0.0:8181 using 12 threads
(2024-07-27 19:19:54) [INFO    ] Call app.loglevel(crow::LogLevel::Warning) to hide Info level logs.
(2024-07-27 19:19:54) [DEBUG   ] 0xaac179bbc840 {0} queue length: 1
(2024-07-27 19:19:58) [DEBUG   ] 0xaac179bbc450 {1} queue length: 1
(2024-07-27 19:19:58) [DEBUG   ] 0xaac179bc7960 timer cancelled: 0xff930fdfdfa8 0
(2024-07-27 19:19:58) [DEBUG   ] task_timer cancelled: 0xff930fdfdfa8 0
(2024-07-27 19:19:58) [DEBUG   ] task_timer scheduled: 0xff930fdfdfa8 1
(2024-07-27 19:19:58) [DEBUG   ] 0xaac179bc7960 timer added: 0xff930fdfdfa8 1
Segmentation fault (core dumped)

I have tested it on 2 different systems with different architectures ARM64 / aarch64 (Win11 wsl2) and x86_64 (Arch linux) unfortunately with the same result.
I'm using the origin/v1.2.0 tag with it's latest commit.

Thank You in Advance for the help and let me know if I can provide any extra info!