Basically, the newly added `withSpawn` combinator is safe to use (https://github.com/Gabriel439/Haskell-Pipes-Concurrency-Library/pull/33#issuecomment-71329094). If you only use that you won't have any issues. It's not as flexible as the garbage-collection approach, but you may not need the extra flexibility. I haven't uploaded that combinator yet, but I will soon (and it's pretty easy to inline in your own code: it's just `bracket`).

The only reason I haven't completely deprecated the garbage-collection-based approach is that Carter indicated to me that he might know what caused the regression and I would like to fix it if possible since it's a really useful feature.

On 1/26/15, 10:50 AM, Ben Moseley wrote:
I'm wondering what the current state-of-play is with pipes-concurrency.

It looks interesting, but I'm made somewhat nervous about adopting it in anger by:

https://github.com/Gabriel439/Haskell-Pipes-Concurrency-Library/issues/27
https://github.com/Gabriel439/Haskell-Pipes-Concurrency-Library/issues/28
https://github.com/Gabriel439/Haskell-Pipes-Concurrency-Library/issues/29
https://www.haskell.org/pipermail/glasgow-haskell-users/2014-July/025107.html

Also, presumably if pipes-concurrency is unsound, then so are mvc, pipes-postgresql-simple, process-streaming etc as they all depend on it...

Can anyone comment?

--Ben

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