GHC failing to build due to errors in DPH?

Simon Peyton-Jones simonpj at
Fri Feb 15 21:14:28 CET 2013

Sorry about that... I don’t know haw my validate worked.  Anyway all good.

From: Ian Lynagh
Sent: ‎15‎ ‎February‎ ‎2013 ‎20‎:‎10
To: Iavor Diatchki
CC: ghc-devs at
Subject: Re: GHC failing to build due to errors in DPH?

On Fri, Feb 15, 2013 at 11:09:33AM -0800, Iavor Diatchki wrote:
> I am trying to build GHC head and get the following error:
> libraries/dph/dph-lifted-base/Data/Array/Parallel/PArray/Reference.hs:50:11:
>     Ambiguous occurrence `fromList'
>     It could refer to either
> `Data.Array.Parallel.PArray.Reference.fromList',
>                              defined at
> libraries/dph/dph-lifted-base/Data/Array

I've just pushed a fix for this.


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