We try to merge consecutive reactive scopes that will always invalidate together, but there's one common case that isn't handled.
```js
const y = [[x]];
```
Here we'll create two consecutive scopes for the inner and outer array expressions. Because the input to the second scope is a temporary, they'll merge into one scope.
But if we name the inner array, the merging stops:
```js
const array = [x];
const y = [array];
```
This is because the merging logic checks if all the dependencies of the second scope are outputs of the first scope, but doesn't account for renaming due to LoadLocal/StoreLocal. The fix is to track these temporaries.
4f05deca4e