Well, cabal-install installed and works fine. Not sure why on my own package that I'm trying to port to GHC 7.6 it doesn't work... I'll try to investigate further. Thanks JP On Fri, Oct 5, 2012 at 6:02 PM, Johan Tibell wrote:

On Fri, Oct 5, 2012 at 5:31 PM, JP Moresmau wrote:

...

Hello, I've installed Cabal and cabal-install 1.16 (which required network) on a new GHC 7.6.1 install and everything went well, except now when building a package requiring network I get:

Loading package network-2.4.0.1 ... ghc.exe: Unknown PEi386 section name `.idata $4' (while processing: c:/ghc/ghc-7.6.1/mingw/lib\libws2_32.a) ghc.exe: panic! (the 'impossible' happened) (GHC version 7.6.1 for i386-unknown-mingw32): loadArchive "c:/ghc/ghc-7.6.1/mingw/lib\\libws2_32.a": failed

I have done something wrong while building network on my Windows XP machine? What can I check?

I'm not quite sure what's going on. We did test cabal-install (and thus network) on a Windows machine before the release.

-- JP Moresmau http://jpmoresmau.blogspot.com/

Just to explain what's going on. It looks like you are compiling a module that uses template haskell, which in turn relies on GHCi bits. In particular, GHCi has a custom linker for loading compiled code. This linker is very fragile and tends to break whenever the platform GCC/linker changes. Similar issues happen a lot on OS X, because Apple tends to change their library formats on most major releases. The only workaround I can think of is to avoid using GHCi or Template Haskell, but I understand that's usually very tricky (especially if one of the dependencies uses TH). On 6 October 2012 09:57, Henk-Jan van Tuyl wrote:

On Fri, 05 Oct 2012 17:31:49 +0200, JP Moresmau wrote:

...

Hello, I've installed Cabal and cabal-install 1.16 (which required network) on a new GHC 7.6.1 install and everything went well, except now when building a package requiring network I get:

Loading package network-2.4.0.1 ... ghc.exe: Unknown PEi386 section name `.idata $4' (while processing: c:/ghc/ghc-7.6.1/mingw/lib\libws2_32.a) ghc.exe: panic! (the 'impossible' happened) (GHC version 7.6.1 for i386-unknown-mingw32): loadArchive "c:/ghc/ghc-7.6.1/mingw/lib\\libws2_32.a": failed

It's a GHC bug and will be solved in GHC 7.6.2, according to: http://hackage.haskell.org/trac/ghc/ticket/7103

Regards, Henk-Jan van Tuyl

-- http://Van.Tuyl.eu/ http://members.chello.nl/hjgtuyl/tourdemonad.html Haskell programming --

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