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Joe Savona
fdbfac8f82
Minimal(ish) repro of a bug we saw internally, where an output of a nested
reactive scope is defined at the wrong block scope, and so later references to
that value are invalid.
The simplified structure is:
```
scope0 inputs=[] outputs=[] {
scope1 inputs=[] outputs=[t0] {
t0 = ...
}
}
t0
```
Note that `t0` correctly appears as an output of the inner scope1, but not as an
output of the outer scope0. We need to propagate outputs upward as necessary to
ensure they are available at the right block scope: in this case, that would add
`t0` as an output of scope0.
An earlier version of PropagateScopeDependencies did this but it looks like it
got lost along the way (not a big deal)