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538ac7ae4b
The `waitForReference` call for debug info can trigger inside a
different object's initializingHandler. In that case, we can get
confused by which one is the root object.
We have this special case to detect if the initializing handler's object
is `null` and we have an empty string key, then we should replace the
root object's value with the resolved value.
52612a7cbd/packages/react-client/src/ReactFlightClient.js (L1374)
However, if the initializing handler actually should have the value
`null` then we might get confused by this and replace it with the
resolved value from a debug object. This fixes it by just using a
non-empty string as the key for the waitForReference on debug value
since we're not going to use it anyway.
It used to be impossible to get into this state since a `null` value at
the root couldn't have any reference inside itself but now the debug
info for a `null` value can have outstanding references.
However, a better fix might be using a placeholder marker object instead
of null or better yet ensuring that we know which root we're
initializing in the debug model.
react-client
This is an experimental package for consuming custom React streaming models.
Its API is not as stable as that of React, React Native, or React DOM, and does not follow the common versioning scheme.
Use it at your own risk.