V4.2.0 - Does not recognize board with custom MicroPython uf2 file on it

[ksiegall]

What are the steps to reproduce this issue?

1. Build new UF2 File with different name
2. Upload to pico as normal
3. Attempt to connect through micropico, with default COM port set (in my case, /dev/ttyACM0)

What happens?

Connection is refused. Depending on platform, error presents slightly differently. On windows, VSCode crashed. This was not seen on Ubuntu (24.04)

What were you expecting to happen?

Connection to the board established, as normal (works fine on 4.10)

Any logs, error output, etc?

(To get extension logs see Terminal > Output > Extension Host and copy output concerning pico-w-go or micropico) (If it’s long, please paste to https://gist.github.com and insert the link here)

No logs or error output in the terminal

Which version of MicroPico are you using?

4.1.0 4.2.1

Support info

Copy this from the Help -> Info/About -> Copy (Code -> About Visual Studio Code -> Copy on macOS) option in Visual Studio Code:

Version: 1.96.4
Commit: cd4ee3b1c348a13bafd8f9ad8060705f6d4b9cba
Date: 2025-01-16T00:16:19.038Z
Electron: 32.2.6
ElectronBuildId: 10629634
Chromium: 128.0.6613.186
Node.js: 20.18.1
V8: 12.8.374.38-electron.0
OS: Linux x64 6.8.0-47-generic snap