Thanks! That is very useful information. The reports have been correlating the problem with compilation, but this indicates the compilation failure is only a symptom of the problem that occurred prior to the initiation of compilation, while the IDE was doing some processing operation following the selection of the board.
This is from Arduino CLI, which provides all the non-GUI functionality for Arduino IDE 2.x under the hood.
In the other reports where I have been successful in obtaining logs from the users, they also showed a panic either identical or similar to the one shown in your logs:
- No Connections Established
- No Connections Established - #10 by jaepetto
- IDE fails to open on a RAM drive, stalls at white window and busy spinner · Issue #1236 · arduino/arduino-ide · GitHub
Possibly. The "No connection established" error is referring to the TCP/IP connection between Arduino IDE 2.x and Arduino CLI.
However, this "No connection established" error seems to me to be only a symptom of the panic/crash you noted. For example, I can produce the same error during compilation by manually killing the arduino-cli process on my machine before triggering a compilation operation in the IDE.