Using new/delete within the 'on' statement causes a memory leak.

[AchcarLucas]

Platform

ESP32

IDE / Tooling

Arduino (IDE/CLI)

What happened?

I have the following code

AsyncCallbackWebHandler& RawRequest::onServer() {
    // PAGE 'raw data' http://[IP-DO-ESP]/raw?page={page}
    return this->webServer->on("/raw", HTTP_GET, [this](AsyncWebServerRequest *request) {
        STARTING_SERVER_PROCESSING();

        uint16_t limit = 10;
        uint16_t currentPage = 1;

        if (request->hasParam("page")) {
            currentPage = request->getParam("page")->value().toInt();
            if (currentPage < 1) {
                currentPage = 1;
            }
        }

        uint32_t totalPages = this->getDataMonitor()->getTotalPages(limit);
        std::list<Sample> samples = this->getDataMonitor()->selectSamples(currentPage, limit);

        Serial.println("Current Page: " + String(currentPage) + " Total Pages: " + String(totalPages));

        RawPage rawPage = RawPage(
            DATABASE,
            currentPage,
            totalPages,
            limit,
            &samples
        );

        request->send(200, "text/html", rawPage.page());

        FINISH_SERVER_PROCESSING();
    });
}

If rawPage is created with new

AsyncCallbackWebHandler& RawRequest::onServer() {
    // PAGE 'raw data' http://[IP-DO-ESP]/raw?page={page}
    return this->webServer->on("/raw", HTTP_GET, [this](AsyncWebServerRequest *request) {
        STARTING_SERVER_PROCESSING();

        uint16_t limit = 10;
        uint16_t currentPage = 1;

        if (request->hasParam("page")) {
            currentPage = request->getParam("page")->value().toInt();
            if (currentPage < 1) {
                currentPage = 1;
            }
        }

        uint32_t totalPages = this->getDataMonitor()->getTotalPages(limit);
        std::list<Sample> samples = this->getDataMonitor()->selectSamples(currentPage, limit);

        Serial.println("Current Page: " + String(currentPage) + " Total Pages: " + String(totalPages));

        Page *rawPage = new RawPage(
            DATABASE,
            currentPage,
            totalPages,
            limit,
            &samples
        );

        request->send(200, "text/html", rawPage.page());
        delete rawPage

        FINISH_SERVER_PROCESSING();
    });
}

Even with the delete function at the end, a memory leak still occurs.

AchcarLucas/Flow-Control-System@2ba8941

Above is the commit I had to make (converting everything to local) to remove the memory leak.

Stack Trace

Memory Leak

Minimal Reproductible Example (MRE)

Memory Leak

I confirm that:

• I have read the documentation.
• I have searched for similar discussions.
• I have searched for similar issues.
• I have looked at the examples.
• I have upgraded to the lasted version of ESPAsyncWebServer (and AsyncTCP for ESP32).

[AchcarLucas]

OBS: https://chatgpt.com/share/69d89a37-15d0-83e9-a6c4-42782ae07540
Does this make sense? If so, a note should be made in the library about the problem.