asset_not_string

Details about the 'asset_not_string' diagnostic produced by the Dart analyzer.

Assets are required to be file paths (strings).

The analyzer produces this diagnostic when an assets list contains a value that isn't a string.

The following code produces this diagnostic because the assets list contains a map:

yaml

name: example
flutter:
  assets:
    - image.gif: true

Change the assets list so that it only contains valid POSIX-style file paths:

yaml

name: example
flutter:
  assets:
    - assets/image.gif

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