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Fixes #31463, #30114. When switching between roots in the profiler flamegraph, the commit index was preserved from the previous root. This caused an error "Invalid commit X. There are only Y commits." when the new root had fewer commits than the selected index. This fix resets the commit index to 0 (or null if no commits) when the commitData changes, which happens when switching roots.
#35598) Currently, IO that finished before the request started is not considered IO: https://github.com/facebook/react/blob/6a0ab4d2dd62dfdf8881ba1c3443c6d5acedc871/packages/react-server/src/ReactFlightServer.js#L5338-L5343 This leads to loss of debug info when a flight stream is deserialized and serialized again. We can solve this by allowing "when the the request started" to be set to a point in the past, when the original stream started by doing ```js const startTime = performance.now() + performance.timeOrigin // ... stuff happens and time passes... ReactServer.renderToReadableStream(..., { startTime }) ```
Allows Server Components to import Context from a `"use client'` module and render its Provider. Only tricky part was that I needed to add `REACT_CONTEXT_TYPE` handling in mountLazyComponent so lazy-resolved Context types can be rendered. Previously only functions, REACT_FORWARD_REF_TYPE, and REACT_MEMO_TYPE were handled. Tested in the Flight fixture. ty bb claude Closes #35340 --------- Co-authored-by: Sophie Alpert <git@sophiebits.com>
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