cannot use dart migrate: waiting for isolate to check in ...

[am15h]

Steps to Reproduce

I am trying to migrate my package but dart migrate keeps printing

Attempt:xxx waiting for isolate vm-isolate to check in
Attempt:xxx waiting for isolate dartdev to check in

and does not terminate. flutter doctor -v and logs attached below.

Logs

Logs

$ dart migrate .
.
Attempt:11 waiting for isolate vm-isolate to check in
Attempt:11 waiting for isolate dartdev to check in
Attempt:12 waiting for isolate vm-isolate to check in
Attempt:12 waiting for isolate dartdev to check in
Attempt:13 waiting for isolate vm-isolate to check in
Attempt:13 waiting for isolate dartdev to check in
Attempt:14 waiting for isolate vm-isolate to check in
Attempt:14 waiting for isolate dartdev to check in
Attempt:15 waiting for isolate vm-isolate to check in
Attempt:15 waiting for isolate dartdev to check in
Attempt:16 waiting for isolate vm-isolate to check in
Attempt:16 waiting for isolate dartdev to check in
Attempt:17 waiting for isolate vm-isolate to check in
Attempt:17 waiting for isolate dartdev to check in
Attempt:18 waiting for isolate vm-isolate to check in
Attempt:18 waiting for isolate dartdev to check in
Attempt:19 waiting for isolate vm-isolate to check in

$ flutter doctor -v
Running "flutter pub get" in flutter_tools...                      13.5s
[✓] Flutter (Channel stable, 2.0.5, on Linux, locale en_US.UTF-8)
    • Flutter version 2.0.5 at /home/amish/snap/flutter/common/flutter
    • Framework revision adc687823a (3 days ago), 2021-04-16 09:40:20 -0700
    • Engine revision b09f014e96
    • Dart version 2.12.3

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
    • Android SDK at /home/amish/Android/Sdk
    • Platform android-30, build-tools 29.0.2
    • Java binary at: /usr/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_275-8u275-b01-0ubuntu1~18.04-b01)
    • All Android licenses accepted.

[✓] Chrome - develop for the web
    • Chrome at google-chrome

[!] Android Studio (not installed)
    • Android Studio not found; download from https://developer.android.com/studio/index.html
      (or visit https://flutter.dev/docs/get-started/install/linux#android-setup for detailed instructions).

[✓] Connected device (1 available)
    • Chrome (web) • chrome • web-javascript • Google Chrome 86.0.4240.111

! Doctor found issues in 1 category.

[darshankawar]

@am15h
I believe this should be reported in dart's dedicated repo: https://github.com/dart-lang/sdk/issues
I already see a similar issue was fixed dart-lang/sdk#45047 and you may follow-up in it for further reference.

Closing from here.

[github-actions]

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