More detail on breakage with ghc-6.10

[Duncan Coutts]

All,

We've been using the cabal-install build reporting stuff to get more
detailed info on build failures with ghc-6.10 vs 6.8. cabal-install
generates these build-reports.log files and individual log files for
each build.

Below is a list of packages that worked with 6.8 and fail with 6.10. If
your package is on this list then you might like to take a look at the
actual failure. I've posted the logs here:
http://haskell.org/~duncan/ghc/hackage-failures-ghc-6.10/

There's one set for ghc-6.8 and one for 6.10.

We can get quite a bit of info from these build-reports.log files just
using grep, sort, uniq etc. However we also have a parser for it so we
can write more interesting queries. For example, we're interested in
regressions:

reports68  <- fmap parseList (readFile "ghc-6.8/build-reports.log")
reports610 <- fmap parseList (readFile "ghc-6.10/build-reports.log")
let merged = mergeBy (comparing package)
                     (sortBy (comparing package) reports68)
                     (sortBy (comparing package) reports610)
    worked InstallOk = True
    worked _         = False
    failed InstallOk = False
    failed (DependencyFailed _) = False
    failed _         = True
    regressions = [ new
                  | InBoth old new <- merged
                  , worked (installOutcome old)
                 && failed (installOutcome new) ]
print (length regressions)
mapM_ (putStrLn . display . package) regressions

There are 58 in this list. Though some have been since fixed and it
doesn't count packages that fail due to dependencies failing. Here's our
current list. I've pruned a couple that I know have been fixed.

ArrayRef-0.1.2
CLASE-2008.9.23.2
EdisonCore-1.2.1.2
HPDF-1.4
HTF-0.1
HaLeX-1.1
Hashell-0.15
Hipmunk-0.2
MemoTrie-0.0
NewBinary-0.1.1
OpenAFP-1.1
PArrows-0.1
TypeCompose-0.5
Vec-0.9.2
WebBits-0.9.2
YamlReference-0.9.2
Yampa-0.9.2.2
arrows-0.4
bytestring-show-0.2
cabal-setup-1.2.1
chp-1.1.0
cmath-0.3
fixpoint-0.1
frag-1.1.1
harpy-0.4
hasim-0.1
hask-home-2007.12.6
heap-0.4.0
hetris-0.2
hexpat-0.2
hinstaller-2008.2.16
hint-0.2.4.1
hslackbuilder-0.0.1
hsx-0.4.4
hxt-8.1.0
iException-0.0.1
libGenI-0.16.1
list-extras-0.2.2
logfloat-0.9.1
mage-1.1.0
numeric-prelude-0.0.4
parameterized-data-0.1.3
plugins-1.3
quantum-arrow-0.0.4
regex-tdfa-0.94
stream-fusion-0.1.1
streamproc-1.1
stringtable-atom-0.0.4
time-1.1.2.1
typalyze-0.1.1
unicode-prelude-0.1
utf8-light-0.3
xmonad-contrib-0.8
xmonad-utils-0.1
yhccore-0.9


Duncan