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When a Dart async exception never reaches your try/catch, the cause is usually an unawaited Future. A diagnostic table, ordered checks, and fixes from await to runZonedGuarded.
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Goal Reduce latency spikes that appear only when many concurrent future calls are made in Racket 8.6. Background The future library shares a thread pool whose idle threads are evicted after a period specified by the --thread-evict flag (default 60 s). The Racket manual provides no runtime API to query or change this timeout, so the eviction period is fixed f
racket