[DevTools] Pick up suspended by info from use() #34148
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… if any (#34162) Stacked on #34148. This picks up the stack for the await from the `use()` Hook if one was used to get this async info. When you select a component that used hooks, we already collect this information. If you select a Suspense boundary, this lazily invokes the first component that awaited this data to inspects its hooks and produce a stack trace for the use(). When all we have for the name is "Promise" I also use the name of the first callsite in the stack trace if there's more than one. Which in practice will be the name of the custom Hook that called it. Ideally we'd use source mapping and ignore listing for this but that would require suspending the display. We could maybe make the SuspendedByRow wrapped in a Suspense boundary for this case. <img width="438" height="401" alt="Screenshot 2025-08-10 at 10 07 55 PM" src="https://github.com/user-attachments/assets/2a68917d-c27b-4c00-84aa-0ceb51c4e541" />
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Similar to #34144 but for
use().use()dependencies don't get added to thefiber._debugInfoset because that just models the things blocking the children, and not the Fiber component itself. This picks up any debug info from the thenable state that we stashed onto_debugThenableStateso that we know it useduse().Without #34146 this doesn't pick up uninstrumented promises but after it, it'll pick those up as well. An instrumented promise that doesn't have anything in its debug info is not picked up. For example, if it didn't depend on any I/O on the server.
This doesn't yet pick up the stack trace of the
use()call. That information is in the Hooks information but needs a follow up to extract it.