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stream: preserve toReadableSync batch after backpressure - #63276
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Keep the current batch and index across _read() calls so chunks that remain after push() returns false are emitted on later reads. Fixes: nodejs#63275 Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com> Assisted-by: openai:gpt-5.5
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@## main #63276 +/- ##
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Coverage 90.04% 90.05% ========================================
Files 713 714 +1 Lines 225003 225256 +253 Branches 42536 42573 +37 ========================================
+ Hits 202606 202849 +243 - Misses 14177 14181 +4 - Partials 8220 8226 +6
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aduh95 pushed a commit
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May 19, 2026
Keep the current batch and index across _read() calls so chunks that remain after push() returns false are emitted on later reads. Fixes: #63275 Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com> Assisted-by: openai:gpt-5.5 PR-URL: #63276Fixes: #63275 Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
aduh95 pushed a commit
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May 19, 2026
Keep the current batch and index across _read() calls so chunks that remain after push() returns false are emitted on later reads. Fixes: #63275 Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com> Assisted-by: openai:gpt-5.5 PR-URL: #63276Fixes: #63275 Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
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Keep the current batch and index across _read() calls so chunks that remain after push() returns false are emitted on later reads. Fixes: nodejs#63275 Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com> Assisted-by: openai:gpt-5.5 PR-URL: nodejs#63276Fixes: nodejs#63275 Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
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toReadableSync()could drop chunks from a batch when classic streambackpressure was applied.
When
_read()pulled a batch with multiple chunks andpush()returnedfalse, the method returned immediately without saving the remaining batchitems. A later
_read()call advanced to the next iterator result, so theunpushed chunks were lost.
This stores the current batch and index across
_read()calls, allowingtoReadableSync()to resume the same batch after backpressure clears.Fixes: #63275
Assisted-by: openai:gpt-5.5