fix: stop mutating OperationRepo deltaQueue during flush#1693
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Rebuilding the unmatched list avoids for-in + remove(at:) on the same array, which could crash or skip deltas. Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
OSOperationRepo.flushDeltaQueuemutatingdeltaQueuewhile iterating it (for-in+remove(at:)), which is undefined behavior and can crash or skip deltas.Stability review live-risk #1; Phase 0 concurrency patch track (non-JWT).
Test plan
UserConcurrencyTests.testOperationRepoFlushingConcurrencystill relevant (run with Full plan).Made with Cursor