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react/packages/react-server/src
Sebastian Markbåge 026abeaa5f [Flight] Respect displayName of Promise instances on the server (#34825)
This lets you assign a name to a Promise that's passed into first party
code from third party since it otherwise would have no other stack frame
to indicate its name since the whole creation stack would be in third
party.

We already respect the `displayName` on the client but it's more
complicated on the server because we don't only consider the exact
instance passed to `use()` but the whole await sequence and we can pick
any Promise along the way for consideration. Therefore this also adds a
change where we pick the Promise node for consideration if it has a name
but no stack. Where we otherwise would've picked the I/O node.

Another thing that this PR does is treat anonymous stack frames (empty
url) as third party for purposes of heuristics like "hasUnfilteredFrame"
and the name assignment. This lets you include these in the actual
generated stacks (by overriding `filterStackFrame`) but we don't
actually want them to be considered first party code in the heuristics
since it ends up favoring those stacks and using internals like
`Function.all` in name assignment.
2025-10-13 12:29:00 -04:00
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