Hot reload failed. App was running

[sethladd]

Host: MacOS
Running: MacOS app (launched ok via GCLI)
Flutter version:

sethladd-macbookpro:testforworkshop sethladd$ flutter --version
Flutter 3.35.4 • channel stable • https://github.com/flutter/flutter.git
Framework • revision d693b4b9db (2 weeks ago) • 2025-09-16 14:27:41 +0000
Engine • hash feee8ee8fb8b975dd9990f86d3bda11e6e75faf3 (revision c298091351) (18 days ago) • 2025-09-15 14:04:24.000Z
Tools • Dart 3.9.2 • DevTools 2.48.0
sethladd-macbookpro:testforworkshop sethladd$ 

GCLI made some changes to the app and then tried to hot reload. See screenshots for errors.

[sethladd]

this is also weird: "No active debug session to take a screenshot".. why is that error message showing up, from the hot_reload tool call?

[sethladd]

I keep trying, and I'm not able to get a flow of "run app, hot reload it" to work. Happy to share screen or logs!

[johnpryan]

It seems like this is working on the Flutter main channel with v0.2.2 of the extension. This could be related to dart-lang/sdk@ad34b0e

cc: @jakemac53 @gspencergoog

[gspencergoog]

this is also weird: "No active debug session to take a screenshot".. why is that error message showing up, from the hot_reload tool call?

This was fixed here: dart-lang/ai#280 (It was a generic error that just happened to refer to screenshots.)

[sethladd]

It seems like this is working on the Flutter main channel with v0.2.2 of the extension. This could be related to dart-lang/sdk@ad34b0e

thanks! We should hot fix this and push a stable build next week, OR we should not advertise this feature next week.

[johnpryan]

I'm seeing this as well:

[sethladd]

thanks @johnpryan , good to confirm it's not just me :)

[sethladd]

we're working on a fix here, but it will take a beta release of the Dart SDK to get a new release of the Dart/FLutter MCP server.