fix: return input channel directly when rechunk size matches#28
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When the input channel's chunk size already matches the requested output chunk size, return the input channel directly instead of creating an intermediate channel and spawning a rechunk task. This fixes a race condition in pipelines where the upstream producer uses a fixed-size buffer pool: with zero-copy passthrough, the same buffer references flow through both the input and intermediate output channels, extending the pipeline depth beyond the producer's pool size. Under slow-consumer conditions (e.g. JIT compilation on first run), the producer wraps around and overwrites buffers still queued downstream, causing data corruption. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
zsoerenm
enabled auto-merge (rebase)
February 17, 2026 08:51
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #28 +/- ##
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+ Coverage 74.21% 74.31% +0.09%
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Files 8 8
Lines 543 545 +2
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+ Hits 403 405 +2
Misses 140 140 ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
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Summary
rechunk(channel, chunk_size)is called with achunk_sizethat already matches the input channel's chunk size, return the input channel directly instead of creating an intermediate channel and task🤖 Generated with Claude Code