significant_drop_tightening false positive on loops

Summary

I want to lock my RwLock before the Loop so i don't have to lock it on every iteration saving performance

let mut entities = world.entities.write().await;
for (uuid, entity_nbt) in &chunk.read().await.data {
     ...
     entities.remove(&base_entity.entity_uuid);
}

when having significant_drop_tightening enabled it suggests me to use this, inside the loop

world.entities.write().await.remove(&base_entity.entity_uuid);

Lint Name

significant_drop_tightening

Reproducer

I tried this code:

let mut entities = world.entities.write().await;
for (uuid, entity_nbt) in &chunk.read().await.data {
     ...
     entities.remove(&base_entity.entity_uuid);
}

I saw this happen:

world.entities.write().await.remove(&base_entity.entity_uuid);

I expected to see this happen:

Version

1.89

Additional Labels

No response

Start with the significant_drop_tightening lint and its handling of the reproducer's lock outside the loop. Determine why the suggestion moves the write lock into each iteration, then add a regression case showing that the existing lock should be retained and verify the lint no longer emits this suggestion.