We followed a goroutine through its whole life — from creation (recycling dead Gs when possible), through running, blocking (where the goroutine parks itself), system calls (where the P detaches so other goroutines keep running), stack growth, and preemption (both cooperative and asynchronous). At the end, the goroutine cleans up after itself and goes back on the free list for reuse.
Россиян предупредили о смертельной опасности лечения простуды алкоголем14:41
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genericClosure forces the key field of each node for deduplication. Everything else stays lazy. What "everything else" means depends on Nix's call-by-need evaluation, and the interaction is subtle. Try a naive trampoline in nix repl:
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