testing current 6-4-branch

[Christian Maeder]

Serge D. Mechveliani wrote:
> Among the `make' reports there occur many "Bad eta expand" messages,
> like this:
> -------------
> /usr/bin/ghc -H16m -O  -istage1/utils ...
>  -Rghc-timing  -H16M '-#include "hschooks.h"' -i../lib/compat  
>  -c cmm/CmmParse.hs -o stage1/cmm/CmmPars\e.o  -ohi stage1/cmm/CmmParse.hi
> Bad eta expand
>     1
>     (__coerce <nt>CmmParse.HappyAbsSyn{tc r3Du}
>      (zgzg{v a8rY}

indeed not nice (but probably harmless). These messages are caused by
the "-c" (coerce) flag passed to happy.

Christian