[haskeline] #132: MonadTrans instance is not exported

haskeline haskeline at projects.haskell.org
Sat Jul 5 07:43:06 BST 2014

#132: MonadTrans instance is not exported
Reporter:  m09     |        Owner:     
    Type:  defect  |       Status:  new
Priority:  major   |    Milestone:     
 Version:          |   Resolution:     
Keywords:          |  

Comment(by judah):

 Sorry for the delay in response.  This works for me with ghc-7.6.1 and
 haskeline-  Which version are you using of ghc and of the
 haskeline, mtl and transformers packages?  (You can use ghc-pkg list to
 see which packages you have installed.)

 Are you using mtl-1.*?  Haskeline uses the transformers package, so you
 need to install a more recent version of mtl that's compatible with
 transformers (I believe >=2.0 would suffice.)  Please let me know whether
 that solves the problem for you.

Ticket URL: <http://trac.haskell.org/haskeline/ticket/132#comment:1>
haskeline <http://example.org/>
My example project

More information about the Haskeline mailing list