Android Studio Dart analyzer erroneously shows 'colors' property of LinearGradient class as non-existent

[MikeCamino]

Android Studio Dart analyzer erroneously shows 'colors' property of LinearGradient class as non-existent. Try to write something like LinearGradient(colors: [Color(0xFFFF4F4F), Color(0xFFB454FF)]) and you will see the following error: "The named parameter 'colors' isn't defined."

At the same time CLI dart analyze doesn't include this error

Also autosuggest shows strange list of available fields

Version information

• Flutter (Channel stable, 1.22.2, on Mac OS X 10.15.7 19H2, locale en-RU)
• Dart SDK version: 2.10.2 (stable) (Tue Oct 13 15:50:27 2020 +0200) on "macos_x64"
• IDEA Dart plugin 201.9002
• IDEA Flutter plugin 50.0.2
• IDEA AI-201.8743.12.41.6858069
• 2.10.2
• AI-201.8743.12.41.6858069, JRE 1.8.0_242-release-1644-b3-6222593x64 JetBrains s.r.o, OS Mac OS X(x86_64) v10.15.7, screens 1440x900 Retina

[ajain-bst]

For me, its the opposite behaviour. dartanalyze does report this incorrect error, but VScode doesnt raise it.

[srawlins]

I suspect something thinks this is a null safe library, and something else thinks this is not a null safe library. So the parameters of LinearGradient are being read as

• begin (with type AlignmentGeometry)
• end (with type AlignmentGeometry)
• List (with type required)

[srawlins]

Closing as stale, since we now only support null-safe libraries; but please re-open if you can reproduce this with a recent version of Dart.