type class problem / GHC bug

[Simon Peyton-Jones]

| Also, I tried to update and rebuild, but the makefiles seem to have
the
| dependencies wrong or something. I compiles THSyntax.hs by hand, then
ran
| into some trouble with files that needed some modules from GHCI trying
| (and dying) to build before the ghci files.Is there a guide to
building
| GHC from CVS anywhere? I had the same problem with alex, but that's
| small enough to build by hand.

Should be ok... are you sure you are up to date?  Make sure you give
"-d" to cvs update, so you get the new TH subdirectory of
Haskell-src/Language/Haskell

Simon