ESPAsyncWebServer.h:1689:49: error: passing 'const AsyncServer' as 'this' argument discards qualifiers [-fpermissive] #442

Platform

ESP32

IDE / Tooling

Arduino (IDE/CLI)

What happened?

Compilation failed when including the module, compiler does not complain about the way I use the library, it complains about the library itself.
Arduino IDE 2.3.8
AsyncTCP v1.1.4
ESPAsyncWebServer 3.11.0 (from github, IDE offers lower version from different source)

Stack Trace

*\Arduino\libraries\ESP_Async_WebServer\src/ESPAsyncWebServer.h: In member function 'tcp_state AsyncWebServer::state() const':
*\Arduino\libraries\ESP_Async_WebServer\src/ESPAsyncWebServer.h:1689:49: error: passing 'const AsyncServer' as 'this' argument discards qualifiers [-fpermissive]
1689 | return static_cast<tcp_state>(_server.status());
| ~~~~~~~~~~~~~~^~
In file included from *\Arduino\libraries\ESP_Async_WebServer\src/ESPAsyncWebServer.h:43:
*\Arduino\libraries\AsyncTCP\src/AsyncTCP.h:198:13: note: in call to 'uint8_t AsyncServer::status()'
198 | uint8_t status();
| ^~~~~~
exit status 1

Compilation error: exit status 1

Minimal Reproductible Example (MRE)

C #include` <ESPAsyncWebServer.h>

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).