stream: avoid leaking consumers on signal failure - #65299
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Validate Broadcast.push() and Share.pull() signals before registering raw consumers. Return a rejecting iterable for pre-aborted signals without adding a cursor. This prevents failed subscriptions from leaving unreachable cursors that inflate consumerCount and can permanently impose backpressure. Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com> Assisted-by: codex:gpt-5.6-sol
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #65299 +/- ##
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+ Coverage 90.30% 90.32% +0.01%
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Files 751 751
Lines 250235 250268 +33
Branches 47305 47304 -1
==========================================
+ Hits 225987 226061 +74
+ Misses 15619 15578 -41
Partials 8629 8629
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Fixes: #65298
Validate Broadcast.push() and Share.pull() signals before registering raw consumers. Return a rejecting iterable for pre-aborted signals without adding a cursor.
This prevents failed subscriptions from leaving unreachable cursors that inflate consumerCount and can permanently impose backpressure.
Assisted-by: codex:gpt-5.6-sol