On Saturday, 10 May 2025 at 04:52:15 UTC, Python wrote:
    for (int i = 0; i < 100; ++i)
    {
        auto captured = i;
        //how do i capture i?
//it's always 99 (or near when first threads are spawned before
        //for cycle ends)
        ThreadPool.enqueue(() {
writefln("Item: %d on thread %d, running %d threads", captured, Thread.getThis.id, ThreadPool.threads);
        });
    }

This is a known issue with capturing variables scoped in a loop:
https://issues.dlang.org/show_bug.cgi?id=21929#c10

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