Concurrent modification error when selecting widget in the inspector

flutter: [WARNING]: Concurrent modification during iteration: Instance(length:18) of '_GrowableList'.

I was seeing this when selecting a variety of widgets (Column, Row, Stack, etc.)

No file, test, or entry point is identified. Start by reproducing the warning while selecting Column, Row, Stack, and other widgets in the inspector, then trace the concurrent iteration and confirm that widget selection no longer emits the warning.

索引モデルが issue の本文から書いたものです。