Re: [Haskell-cafe] Dynamic loading of module

29 Aug 2011

      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.
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