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unfinished statement `Future<List<>>` breaks the IDE

See original GitHub issue

Steps to Reproduce

Open android studio
Open an existing project
Create a new dart file
add the following statement Future<List<>> (yes it’s unfinished on the purpose, that’s how it breaks android studio)
go to another dart file, try autocompletion (example type fin and hit ctrl+space in order to autocomplete the word final)

The whole IDE completion is now broken - not only that, but also slower and laggy - code analysis is also broken.

sometimes it does not break straight away so try to restart the ide as it is (leave in place the unfinished statement in the new file).
when android studio restarts, then autocompletion does not work

Now to fix this you need to remove the unfinished statement and to restart the ide again.

Note that I have tried with a few other statement combinations, that also broke the ide. ie:

List<Future<>>
List<List<>>
List<List<List<>>>

Whereas the following do not break:

List<>

Version info

[√] Flutter (Channel stable, 1.20.4, on Microsoft Windows [version 10.0.18362.1082], locale fr-FR)
    • Flutter version 1.20.4 at C:\Users\bob\Documents\flutter
    • Framework revision fba99f6cf9 (5 days ago), 2020-09-14 15:32:52 -0700
    • Engine revision d1bc06f032
    • Dart version 2.9.2


[√] Android toolchain - develop for Android devices (Android SDK version 30.0.1)
    • Android SDK at C:\Users\bob\AppData\Local\Android\sdk
    • Platform android-30, build-tools 30.0.1
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)
    • All Android licenses accepted.

[√] Android Studio (version 4.0)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin version 49.0.2
    • Dart plugin version 193.7547
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)

Issue Analytics

State:
Created 3 years ago
Comments:6 (3 by maintainers)

Top GitHub Comments

1reaction

scheglovcommented, Sep 25, 2020

It seems to the into the infinite loop in IgnoreInfo.forDart.

1reaction

pqcommented, Sep 25, 2020

Thanks for the report @gsouf!

I’m seeing this locally too.

@scheglov: I’m not seeing anything in a quick scan through the logs… Curious if you have any thoughts?

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