On 21/02/15 01:58, Rob Leslie wrote: > My experience with forkProcess so far is that sometimes it works brilliantly, and other times it just deadlocks. Here's a bug about forkProcess deadlocking with GHC < 7.8.4: https://ghc.haskell.org/trac/ghc/ticket/9295 And here some other problems I found: https://ghc.haskell.org/trac/ghc/ticket/9470