On 11-08-28 04:53 PM, Brandon Allbery wrote:

That'd be expected; you shouldn't simply obliterate package.conf.d, you need to keep ghc's boot libraries (which include itself as a library). If the boot libraries are somehow hosed, you need to reinstall the compiler to get them back.

Different package.conf.d I suggested obliterating C:\Documents and Settings\abailly\Application Data\ghc\i386-mingw32-7.0.3\package.conf.d (on linux it would be called ~/.ghc/i386-linux-7.0.3/package.conf.d). That would just drop user packages and not touch boot packages (global packages for that matter). You can also see that under the listing of D:/Program Files/Haskell Platform/2011.2.0.1\lib\package.conf.d the majority of packages are still there, not obliterated. (For example base, bin-package-db are still there.)

On 11-08-28 10:38 PM, Brandon Allbery wrote:

On Sun, Aug 28, 2011 at 22:13, Albert Y. C. Lai mailto:trebla@vex.net> wrote:

On 11-08-28 04:53 PM, Brandon Allbery wrote:

That'd be expected; you shouldn't simply obliterate package.conf.d, you need to keep ghc's boot libraries (which include itself as a library). If the boot libraries are somehow hosed, you need to reinstall the compiler to get them back.

Different package.conf.d

Except that, as you discovered later, the user was obviously talking about having obliterated the system one. :(

Explain to me why the following survives obliteration: D:/Program Files/Haskell Platform/2011.2.0.1\lib\package.conf.d: [...] base-4.3.1.0 (base-4.3.1.0-f520cd232cc386346843c4a12b63f44b) bin-package-db-0.0.0.0 (bin-package-db-0.0.0.0-97d865e5935b41538bcb29fc1040ae7d) [...] ffi-1.0 (builtin_ffi) (ghc-binary-0.5.0.2 (ghc-binary-0.5.0.2-aba2b5dca5546ea1a972188de48f87b5)) ghc-prim-0.2.0.0 (ghc-prim-0.2.0.0-e1f7c380581d61d42b0360d440cc35ed) [...] integer-gmp-0.2.0.3 (integer-gmp-0.2.0.3-91607778cf3ae8f3948a50062b4f8479) rts-1.0 (builtin_rts) [...]

Thanks again for your patience and efforts. I am pretty sure I did not remove anything from the global package scope, at least intentionally. But of course I may have done things whcih you did not recommend. Here is the command-line history: ghc-pgk unregister --user template-haskell ghc-pkg unregister --user template-haskell ghc-pkg unregister --force --user template-haskell ghc-pkg unregister --force --user quickcheck ghc-pkg unregister --force --user QuickCheck ghc-pkg unregister --force --user template-haskell cd C:\Documents and Settings\abailly\Application Data\ghc\i386-mingw32-7.0.3\ dir c: dir cd package.conf.d dir cd .. rm -fr package.conf.d d: ghc-pkg check ghc-pkg update ghc-pkg recache Regards, Arnaud On Mon, Aug 29, 2011 at 4:03 AM, Albert Y. C. Lai wrote:

On 11-08-28 04:40 PM, Arnaud Bailly wrote:

...

Hello Albert, Thanks for taking the time to help me fix this package stuff. So I wiped out my package.conf.d/ and tried to reinstall my stuff. Installing template-haskell 2.5.0.0 is ok (2.6 is not, fails to compile on ghc 7.0.3) but then:

D:\projets\>ghc --make -package ghc main <command line>: cannot satisfy -package ghc (use -v for more information)

I suspect I really *do* have to reinstall haskell-platform. Here is the output of ghc-pkg list -v:

using cache: C:\Documents and Settings\abailly\Application Data\ghc\i386-mingw32-7.0.3\**package.conf.d\package.cache using cache: D:/Program Files/Haskell Platform/2011.2.0.1\lib\**package.conf.d\package.cache D:/Program Files/Haskell Platform/2011.2.0.1\lib\**package.conf.d: Cabal-1.10.1.0 (Cabal-1.10.1.0-**55f781465ee9f32289755ad706c71f**0f) GLUT-2.1.2.1 (GLUT-2.1.2.1-**2d30997b9a19d27be388572e75af52**bf) HTTP-4000.1.1 (HTTP-4000.1.1-**267a332938fa742ba5a5d59de0b46d**60) HUnit-1.2.2.3 (HUnit-1.2.2.3-**102fbfbd594cd6d38461f5c68d8809**96) OpenGL-2.2.3.0 (OpenGL-2.2.3.0-**a58ce3ad6070e6b7932a3e779be57f**75) Win32-2.2.0.1 (Win32-2.2.0.1-**26cf39fdf591bdac61b11d5a443c62**ab) array-0.3.0.2 (array-0.3.0.2-**8e9cd0144e87fa9cc86cc9031631c4**f3) base-4.3.1.0 (base-4.3.1.0-**f520cd232cc386346843c4a12b63f4**4b) bin-package-db-0.0.0.0 (bin-package-db-0.0.0.0-**97d865e5935b41538bcb29fc1040ae**7d) bytestring-0.9.1.10 (bytestring-0.9.1.10-**cd85f14e02463c02ba4c77d7adcdb5**4f) cgi-3001.1.7.4 (cgi-3001.1.7.4-**659440ce11c2975fd9c9c471a1e8ff**3b) containers-0.4.0.0 (containers-0.4.0.0-**18deac99a132f04751d862b77aab13**6e) deepseq-1.1.0.2 (deepseq-1.1.0.2-**09b3aed0c4982bbc6569c668100876** fa) directory-1.1.0.0 (directory-1.1.0.0-**3a2367d72569467a8af8a231656ff1 **b8) extensible-exceptions-0.1.1.2 (extensible-exceptions-0.1.1.**2-**d8c5b906654260efd7249f497d17a8**31) ffi-1.0 (builtin_ffi) fgl-5.4.2.3 (fgl-5.4.2.3-**595811d6eabb1e1768685703ea66e9**82) filepath-1.2.0.0 (filepath-1.2.0.0-**f132e9f7703da4e20a47ff2b9acf1e** a1) (ghc-binary-0.5.0.2 (ghc-binary-0.5.0.2-**aba2b5dca5546ea1a972188de48f87**b5)) ghc-prim-0.2.0.0 (ghc-prim-0.2.0.0-**e1f7c380581d61d42b0360d440cc35** ed) haskell-src-1.0.1.4 (haskell-src-1.0.1.4-**7428a8c9049cd6bf5abdc0bbd2d417**c5) (haskell2010-1.0.0.0 (haskell2010-1.0.0.0-**53d9cd65595c551eea0c0269f534b5**e0)) haskell98-1.1.0.1 (haskell98-1.1.0.1-**35ec26bae828637c1638c8be441b3d **68) hpc-0.5.0.6 (hpc-0.5.0.6-**481dbb43fb624c21ad3bb9434675e3**ac) html-1.0.1.2 (html-1.0.1.2-**a494249f98a0f38b1a8db28bc70f8b**0b) integer-gmp-0.2.0.3 (integer-gmp-0.2.0.3-**91607778cf3ae8f3948a50062b4f84**79) mtl-2.0.1.0 (mtl-2.0.1.0-**fb4d1695269b74308c1517c06b76e6**e8) network-2.3.0.2 (network-2.3.0.2-**47657e39a6118a978d9f443d72e85d** 4a) old-locale-1.0.0.2 (old-locale-1.0.0.2-**6e2a3c0744e8cf4e0ac2d4e58659f7**b5) old-time-1.0.0.6 (old-time-1.0.0.6-**445ce39cbcebd38069c25c0f383b72** 8d) parallel-3.1.0.1 (parallel-3.1.0.1-**6eaa564e1ef1537bc88ad1fea6c90f** e2) parsec-3.1.1 (parsec-3.1.1-**9da59b00c02e52f9f62f3c87c7e0e2**ec) pretty-1.0.1.2 (pretty-1.0.1.2-**abc7c632374e50e1c1927987c2651f**0f) process-1.0.1.5 (process-1.0.1.5-**b3dded8e54a2e13d22af410bdcfaff** f4) random-1.0.0.3 (random-1.0.0.3-**1abde37180be5476311abeefe300ab**c2) regex-base-0.93.2 (regex-base-0.93.2-**9e1b027c41dbec856469a30982495b **b9) regex-compat-0.93.1 (regex-compat-0.93.1-**31c61fe0aee45e8a9853edf7a844f7**4e) regex-posix-0.94.4 (regex-posix-0.94.4-**f5eb628ea5dae5f91552d5ea0e2635**9d) rts-1.0 (builtin_rts) stm-2.2.0.1 (stm-2.2.0.1-**57e291244ee02349552a4f79caeb4f**fe) syb-0.3 (syb-0.3-**8db7bc4339a1cb8a6f2a46c40447ef**0b) text-0.11.0.6 (text-0.11.0.6-**398a3f02891247aea46662fc7379c4**a5) time-1.2.0.3 (time-1.2.0.3-**74ef6ac31cee9aec02b036978af002**d2) transformers-0.2.2.0 (transformers-0.2.2.0-**2fe7b735c63a6cbe8724038d8e4d81**2a) xhtml-3000.2.0.1 (xhtml-3000.2.0.1-**ace31b2e48c396e565655b0f34f5d2** b7) zlib-0.5.3.1 (zlib-0.5.3.1-**5fbdf714525b76e0e601c2ffb25f20**44)

C:\Documents and Settings\abailly\Application Data\ghc\i386-mingw32-7.0.3\**package.conf.d: QuickCheck-2.4.1.1 (QuickCheck-2.4.1.1-**04d68679694a517ba23022a4c6bc1c**de) ghc-paths-0.1.0.8 (ghc-paths-0.1.0.8-**be391faf057d651dbb92b73671fe9e **ee) template-haskell-2.5.0.0 (template-haskell-2.5.0.0-**87f4f416a22a910e480ac9f269479a**5f) utf8-string-0.3.7 (utf8-string-0.3.7-**dcbcb8de655cdfe1c4c28c094f8c67 **99)

Thanks again, Arnaud

On Sat, Aug 27, 2011 at 8:59 PM, Albert Y. C. Lai mailto:trebla@vex.net> wrote:

You have too many instances of template-haskell. The important parts are:

package ghc-7.0.3-__**fc75cf67c86ba2c0d64b07024a18d3**__b4 is unusable

due to missing or recursive dependencies: template-haskell-2.5.0.0-__**7d9b1443ac5ab69e5ed705a487990d**__eb

package template-haskell-2.5.0.0-__**7d9b1443ac5ab69e5ed705a487990d**__eb is shadowed by package template-haskell-2.5.0.0-__**87f4f416a22a910e480ac9f269479a**__5f

and in "ghc-pkg list -v":

D:/Program Files/Haskell Platform/2011.2.0.1\lib\__**package.conf.d:

template-haskell-2.5.0.0 (template-haskell-2.5.0.0-__**7d9b1443ac5ab69e5ed705a487990d**__eb)

C:\Documents and Settings\abailly\Application Data\ghc\i386-mingw32-7.0.3\__**package.conf.d:

template-haskell-2.5.0.0 (template-haskell-2.5.0.0-__**87f4f416a22a910e480ac9f269479a**__5f)

I don't know how you got to this unsafe state. But my article explains what's wrong with it. (Though my example has different version numbers on top of different ABI hashes).

The user instance of template-haskell (__**87f4f416a22a910e480ac9f269479a**__5f) is getting into the way. Lose

it by doing "ghc-pkg unregister --user template-haskell" on it. Oh, it will complain about breaking other packages; well, lose them too.

(Or go one step further and lose all of C:\Documents and Settings\abailly\Application Data\ghc\i386-mingw32-7.0.3\__**package.conf.d which means losing all user packages.)

(Reinstalling haskell platform changes nothing, as long as some user package gets into the way.)

I do not understand why you had template-haskell in global and now you don't, i.e., last time you still had

D:/Program Files/Haskell Platform/2011.2.0.1\lib\**package.conf.d: [...] template-haskell-2.5.0.0 (template-haskell-2.5.0.0-** 7d9b1443ac5ab69e5ed705a487990d**eb)

and now you don't have it.

I clearly did not suggest getting rid of it.

I only suggested getting rid of the user instance "ghc-pkg unregister --user template-haskell" and/or getting rid of "C:\Documents and Settings\abailly\Application Data\ghc\i386-mingw32-7.0.3\**package.conf.d" which are all just user instances, wouldn't lose global instances.

I do not understand why you are so keen on replacing what comes with GHC and/or Haskell Platform. I have said several times that such replacements cause troubles.

I give up. I am replying because I want to record that my suggestion would not lead to an important part of the current state.

______________________________**_________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/**mailman/listinfo/haskell-cafehttp://www.haskell.org/mailman/listinfo/haskell-cafe

After reinstalling HP 2011.2.0.1 and (re)wiping out user package directory, things are in better shape and I can now compile the faulty module. I am well aware I did something wrong at some point in time but I am not really sure of what happened. I suspect things went wrong when I tried to install a recent version of snap framework : I vaguely recall having to upgrade some "core" modules to make cabal happy which obviously was not a good thing. Maybe this already exists but it would good to have some "session-like" feature in cabal that would allow fiddling with the configuration and give the user the ability to rollback what she did. Not sure this would be to easy to implement though... Thanks again for your help. Best regards, Arnaud On Mon, Aug 29, 2011 at 8:43 AM, Arnaud Bailly wrote:

Anyway, I will reinstall Haskell platform and read carefully your post to be sure I do not screwed my setup again in the future.

Best regards, Arnaud

On Mon, Aug 29, 2011 at 8:41 AM, Arnaud Bailly wrote:

...

Thanks again for your patience and efforts. I am pretty sure I did not remove anything from the global package scope, at least intentionally. But of course I may have done things whcih you did not recommend. Here is the command-line history:

ghc-pgk unregister --user template-haskell

ghc-pkg unregister --user template-haskell ghc-pkg unregister --force --user template-haskell ghc-pkg unregister --force --user quickcheck ghc-pkg unregister --force --user QuickCheck ghc-pkg unregister --force --user template-haskell cd C:\Documents and Settings\abailly\Application Data\ghc\i386-mingw32-7.0.3\ dir c: dir cd package.conf.d dir cd .. rm -fr package.conf.d d: ghc-pkg check ghc-pkg update ghc-pkg recache

Regards, Arnaud

On Mon, Aug 29, 2011 at 4:03 AM, Albert Y. C. Lai wrote:

...

On 11-08-28 04:40 PM, Arnaud Bailly wrote:

...

Hello Albert, Thanks for taking the time to help me fix this package stuff. So I wiped out my package.conf.d/ and tried to reinstall my stuff. Installing template-haskell 2.5.0.0 is ok (2.6 is not, fails to compile on ghc 7.0.3) but then:

D:\projets\>ghc --make -package ghc main <command line>: cannot satisfy -package ghc (use -v for more information)

I suspect I really *do* have to reinstall haskell-platform. Here is the output of ghc-pkg list -v:

using cache: C:\Documents and Settings\abailly\Application Data\ghc\i386-mingw32-7.0.3\**package.conf.d\package.cache using cache: D:/Program Files/Haskell Platform/2011.2.0.1\lib\**package.conf.d\package.cache D:/Program Files/Haskell Platform/2011.2.0.1\lib\**package.conf.d: Cabal-1.10.1.0 (Cabal-1.10.1.0-**55f781465ee9f32289755ad706c71f** 0f) GLUT-2.1.2.1 (GLUT-2.1.2.1-**2d30997b9a19d27be388572e75af52**bf) HTTP-4000.1.1 (HTTP-4000.1.1-**267a332938fa742ba5a5d59de0b46d**60) HUnit-1.2.2.3 (HUnit-1.2.2.3-**102fbfbd594cd6d38461f5c68d8809**96) OpenGL-2.2.3.0 (OpenGL-2.2.3.0-**a58ce3ad6070e6b7932a3e779be57f** 75) Win32-2.2.0.1 (Win32-2.2.0.1-**26cf39fdf591bdac61b11d5a443c62**ab) array-0.3.0.2 (array-0.3.0.2-**8e9cd0144e87fa9cc86cc9031631c4**f3) base-4.3.1.0 (base-4.3.1.0-**f520cd232cc386346843c4a12b63f4**4b) bin-package-db-0.0.0.0 (bin-package-db-0.0.0.0-**97d865e5935b41538bcb29fc1040ae**7d) bytestring-0.9.1.10 (bytestring-0.9.1.10-**cd85f14e02463c02ba4c77d7adcdb5**4f) cgi-3001.1.7.4 (cgi-3001.1.7.4-**659440ce11c2975fd9c9c471a1e8ff** 3b) containers-0.4.0.0 (containers-0.4.0.0-**18deac99a132f04751d862b77aab13**6e) deepseq-1.1.0.2 (deepseq-1.1.0.2-**09b3aed0c4982bbc6569c668100876** fa) directory-1.1.0.0 (directory-1.1.0.0-** 3a2367d72569467a8af8a231656ff1**b8) extensible-exceptions-0.1.1.2 (extensible-exceptions-0.1.1.**2-**d8c5b906654260efd7249f497d17a8**31) ffi-1.0 (builtin_ffi) fgl-5.4.2.3 (fgl-5.4.2.3-**595811d6eabb1e1768685703ea66e9**82) filepath-1.2.0.0 (filepath-1.2.0.0-**f132e9f7703da4e20a47ff2b9acf1e **a1) (ghc-binary-0.5.0.2 (ghc-binary-0.5.0.2-**aba2b5dca5546ea1a972188de48f87**b5)) ghc-prim-0.2.0.0 (ghc-prim-0.2.0.0-**e1f7c380581d61d42b0360d440cc35 **ed) haskell-src-1.0.1.4 (haskell-src-1.0.1.4-**7428a8c9049cd6bf5abdc0bbd2d417**c5) (haskell2010-1.0.0.0 (haskell2010-1.0.0.0-**53d9cd65595c551eea0c0269f534b5**e0)) haskell98-1.1.0.1 (haskell98-1.1.0.1-** 35ec26bae828637c1638c8be441b3d**68) hpc-0.5.0.6 (hpc-0.5.0.6-**481dbb43fb624c21ad3bb9434675e3**ac) html-1.0.1.2 (html-1.0.1.2-**a494249f98a0f38b1a8db28bc70f8b**0b) integer-gmp-0.2.0.3 (integer-gmp-0.2.0.3-**91607778cf3ae8f3948a50062b4f84**79) mtl-2.0.1.0 (mtl-2.0.1.0-**fb4d1695269b74308c1517c06b76e6**e8) network-2.3.0.2 (network-2.3.0.2-**47657e39a6118a978d9f443d72e85d** 4a) old-locale-1.0.0.2 (old-locale-1.0.0.2-**6e2a3c0744e8cf4e0ac2d4e58659f7**b5) old-time-1.0.0.6 (old-time-1.0.0.6-**445ce39cbcebd38069c25c0f383b72 **8d) parallel-3.1.0.1 (parallel-3.1.0.1-**6eaa564e1ef1537bc88ad1fea6c90f **e2) parsec-3.1.1 (parsec-3.1.1-**9da59b00c02e52f9f62f3c87c7e0e2**ec) pretty-1.0.1.2 (pretty-1.0.1.2-**abc7c632374e50e1c1927987c2651f** 0f) process-1.0.1.5 (process-1.0.1.5-**b3dded8e54a2e13d22af410bdcfaff** f4) random-1.0.0.3 (random-1.0.0.3-**1abde37180be5476311abeefe300ab** c2) regex-base-0.93.2 (regex-base-0.93.2-** 9e1b027c41dbec856469a30982495b**b9) regex-compat-0.93.1 (regex-compat-0.93.1-**31c61fe0aee45e8a9853edf7a844f7**4e) regex-posix-0.94.4 (regex-posix-0.94.4-**f5eb628ea5dae5f91552d5ea0e2635**9d) rts-1.0 (builtin_rts) stm-2.2.0.1 (stm-2.2.0.1-**57e291244ee02349552a4f79caeb4f**fe) syb-0.3 (syb-0.3-**8db7bc4339a1cb8a6f2a46c40447ef**0b) text-0.11.0.6 (text-0.11.0.6-**398a3f02891247aea46662fc7379c4**a5) time-1.2.0.3 (time-1.2.0.3-**74ef6ac31cee9aec02b036978af002**d2) transformers-0.2.2.0 (transformers-0.2.2.0-**2fe7b735c63a6cbe8724038d8e4d81**2a) xhtml-3000.2.0.1 (xhtml-3000.2.0.1-**ace31b2e48c396e565655b0f34f5d2 **b7) zlib-0.5.3.1 (zlib-0.5.3.1-**5fbdf714525b76e0e601c2ffb25f20**44)

C:\Documents and Settings\abailly\Application Data\ghc\i386-mingw32-7.0.3\**package.conf.d: QuickCheck-2.4.1.1 (QuickCheck-2.4.1.1-**04d68679694a517ba23022a4c6bc1c**de) ghc-paths-0.1.0.8 (ghc-paths-0.1.0.8-** be391faf057d651dbb92b73671fe9e**ee) template-haskell-2.5.0.0 (template-haskell-2.5.0.0-**87f4f416a22a910e480ac9f269479a**5f) utf8-string-0.3.7 (utf8-string-0.3.7-** dcbcb8de655cdfe1c4c28c094f8c67**99)

Thanks again, Arnaud

On Sat, Aug 27, 2011 at 8:59 PM, Albert Y. C. Lai mailto:trebla@vex.net> wrote:

You have too many instances of template-haskell. The important parts are:

package ghc-7.0.3-__**fc75cf67c86ba2c0d64b07024a18d3**__b4 is unusable

due to missing or recursive dependencies: template-haskell-2.5.0.0-__**7d9b1443ac5ab69e5ed705a487990d**__eb

package template-haskell-2.5.0.0-__**7d9b1443ac5ab69e5ed705a487990d**__eb is shadowed by package template-haskell-2.5.0.0-__**87f4f416a22a910e480ac9f269479a**__5f

and in "ghc-pkg list -v":

D:/Program Files/Haskell Platform/2011.2.0.1\lib\__**package.conf.d:

template-haskell-2.5.0.0 (template-haskell-2.5.0.0-__**7d9b1443ac5ab69e5ed705a487990d**__eb)

C:\Documents and Settings\abailly\Application Data\ghc\i386-mingw32-7.0.3\__**package.conf.d:

template-haskell-2.5.0.0 (template-haskell-2.5.0.0-__**87f4f416a22a910e480ac9f269479a**__5f)

I don't know how you got to this unsafe state. But my article explains what's wrong with it. (Though my example has different version numbers on top of different ABI hashes).

The user instance of template-haskell (__**87f4f416a22a910e480ac9f269479a**__5f) is getting into the way. Lose

it by doing "ghc-pkg unregister --user template-haskell" on it. Oh, it will complain about breaking other packages; well, lose them too.

(Or go one step further and lose all of C:\Documents and Settings\abailly\Application Data\ghc\i386-mingw32-7.0.3\__**package.conf.d which means losing all user packages.)

(Reinstalling haskell platform changes nothing, as long as some user package gets into the way.)

I do not understand why you had template-haskell in global and now you don't, i.e., last time you still had

D:/Program Files/Haskell Platform/2011.2.0.1\lib\**package.conf.d: [...] template-haskell-2.5.0.0 (template-haskell-2.5.0.0-** 7d9b1443ac5ab69e5ed705a487990d**eb)

and now you don't have it.

I clearly did not suggest getting rid of it.

I only suggested getting rid of the user instance "ghc-pkg unregister --user template-haskell" and/or getting rid of "C:\Documents and Settings\abailly\Application Data\ghc\i386-mingw32-7.0.3\**package.conf.d" which are all just user instances, wouldn't lose global instances.

I do not understand why you are so keen on replacing what comes with GHC and/or Haskell Platform. I have said several times that such replacements cause troubles.

I give up. I am replying because I want to record that my suggestion would not lead to an important part of the current state.

______________________________**_________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/**mailman/listinfo/haskell-cafehttp://www.haskell.org/mailman/listinfo/haskell-cafe

No offense :-) Thanks for taking the time to investigate this stuff. It gave me the opportunity to get a closer look at ghc package management. Regards, Arnaud On Mon, Aug 29, 2011 at 5:28 PM, Albert Y. C. Lai wrote:

On 11-08-29 02:41 AM, Arnaud Bailly wrote:

...

ghc-pkg unregister --force --user template-haskell

[...]

...

ghc-pkg unregister --force --user template-haskell

I am sorry. I apologize. It was not your fault. It was my fault. "unregister --user" drops the global instance when there is no user instance, which is when the 2nd time you issued the command. It is a ghc-pkg bug.

(I already knew the dual bug: "unregister --global" drops the user instance when there is one. I make do with "unregister --global --no-user-package-conf".)

______________________________**_________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/**mailman/listinfo/haskell-cafehttp://www.haskell.org/mailman/listinfo/haskell-cafe