libghc-safesemaphore-doc 0.10.1-5build1 (arm64 binary) in ubuntu xenial

 This is an alternative to the deprecated QSem, QSemN, and SampleVar in
 GHC base. Those base modules are not exception safe and can be broken
 by killThread.
 .
 This package provides the documentation for a library for the Haskell
 programming language.
 See http://www.haskell.org/ for more information on Haskell.