Digraph.lhs broken?

[Esa Ilari Vuokko]

On 8/19/06, Joel Reymont <joelr1 at gmail.com> wrote:
> /usr/local/bin/ghc -H16m -O  -istage1/utils  -istage1/basicTypes  -
> istage1/types  -istage1/hsSyn  -istage1/prelude  -istage1/rename  -
> istage1/typecheck  -istage1/deSugar  -istage1/coreSyn  -istage1/
> specialise  -istage1/simplCore  -istage1/stranal  -istage1/stgSyn  -
> istage1/simplStg  -istage1/codeGen  -istage1/main  -istage1/
> profiling  -istage1/parser  -istage1/cprAnalysis  -istage1/
> ndpFlatten  -istage1/iface  -istage1/cmm  -istage1/nativeGen  -
> istage1/ghci -Istage1 -DGHCI -DBREAKPOINT -package template-haskell -
> threaded -package readline -DUSE_READLINE -cpp -fglasgow-exts -fno-
> generics -Rghc-timing -I. -IcodeGen -InativeGen -Iparser -package
> unix -ignore-package lang -recomp -Rghc-timing  -H16M '-#include
> "cutils.h"' -i../compat -ignore-package Cabal  -fglasgow-exts   -c
> utils/Digraph.lhs -o stage1/utils/Digraph.o  -ohi stage1/utils/
> Digraph.hi
>
> utils/Digraph.lhs:133:12:
>      Ambiguous occurrence `indices'
>      It could refer to either `GHC.Arr.indices', imported from Array
> at utils/Digraph.lhs:43:0-11
>                            or `Data.Array.Base.indices', imported
> from Data.Array.ST at utils/Digraph.lhs:48:0-19
>
> utils/Digraph.lhs:139:18:
>      Ambiguous occurrence `bounds'
>      It could refer to either `GHC.Arr.bounds', imported from Array
> at utils/Digraph.lhs:43:0-11
>                            or `Data.Array.Base.bounds', imported from
> Data.Array.ST at utils/Digraph.lhs:48:0-19

I think I know why that is happening.

This is because you are compiling ghc 6.5 using older (few weeks and more)
ghc 6.5.  During this time Array-interfaces changed in base, and ghc
had to be patched for it.  The fix is to either use previous release of
ghc (6.4) for stage1 or unpull/rollback patch

Wed Aug  9 19:13:41 FLE Standard Time 2006  Esa Ilari Vuokko <ei at vuokko.info>
  * Fix Array imports

for stage1.  But you will need to reapply it for stage2.

I haven't tried this, but it should work :-)

HTH,
--Esa Ilari Vuokko