Say I have a []T that I want to use as a common stem that has a tail
appended onto it, used concurrently, for example:
for i := 0; i < N; i++ {
tail := makeTail(i) // Returns a []T.
wg.Add(1)
go func() {
defer wg.Done()
a := append(stem, tail...)
fn(a) // Does something expensive with a []T.
}()
}
wg.Wait()
This looks racy to me, since each append can potentially clobber
elements in stem between len(stem) and cap(stem). Am I being paranoid
or should I write this append as append(stem[:len(stem):len(stem)],
tail...)?
I have not been able to get the race detector to complain about this,
even if I make len << cap.
thanks
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