Another dead head?!?

[Manuel M T Chakravarty]

I just pushed a patch fixing this.  The error only appeared when 
compiling without -DDEBUG, but this is the default for validate.  I 
think it's a good idea to have a clean repos just for validate with 
all the default settings.

Manuel

Manuel M T Chakravarty wrote:
> validate dies for me with the appended error on MacOS with the latest HEAD.
> 
> Manuel
> 
> /opt/local/bin/ghc -Werror -H64m -Onot -fasm  -istage1/utils 
> -istage1/basicTypes  -istage1/types  -istage1/hsSyn -istage1/prelude  
> -istage1/rename  -istage1/typecheck -istage1/deSugar  -istage1/coreSyn  
> -istage1/vectorise -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 
> -Wall -fno-warn-name-shadowing -fno-warn-orphans -Istage1 -cpp 
> -fglasgow-exts -fno-generics -Rghc-timing -I. -Iparser -package unix 
> -ignore-package lang -recomp -Rghc-timing -O -fasm -H16M '-#include 
> "cutils.h"' -DUSING_COMPAT -i../compat -ignore-package Cabal    -c 
> cmm/CmmZipUtil.hs -o stage1/cmm/CmmZipUtil.o  -ohi stage1/cmm/CmmZipUtil.hi
> 
> cmm/MkZipCfg.hs:330:44:
>     Couldn't match expected type `m ()' against inferred type `()'
>     In the first argument of `return', namely `()'
>     In the expression: return ()
>     In the definition of `note_this_code_becomes_unreachable':
>         note_this_code_becomes_unreachable = return ()
> 
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