Pull Request Overview

Opened on October 19, 2026
Status Merged
Commit count 2 with first commit October 19, 2026

Total Delta

72 Total Diff Delta

Open Days

Open 20 weekdays

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0 Diff Delta in Test Files

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	0.0 days	Authoring 1 commit before pull request opened for review
	0.2 days	Awaiting first review
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[Fizz] Fix truncated prerender output under backpressure

An aborted prerender can finish all tasks while partial output remains queued. If a Node stream applies backpressure, Fizz can close it before it flushes the remaining boundaries. This bug predates #37876 and also affects initial prerenders.

Fizz now waits for partialBoundaries to empty before it closes the destination. The regression test forces backpressure with highWaterMark: 1 and verifies that push() returns false. Without the fix, the stream emits the first boundary's partial content and closes before it emits the second's.

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