[Haskell-cafe] ghc leaking memory?

Antoine Latter aslatter at gmail.com
Sat Mar 6 13:43:07 EST 2010

Including ghc-users.

On Sat, Mar 6, 2010 at 11:57 AM, Joachim Breitner <nomeata at debian.org> wrote:
> Hi,
> in Debian, we are having some problems building large libraries (such as
> agda, highlighting-kate, xmonad-contrib) on weaker architectures (sparc,
> armel, s390) which compile with -fvia-C, especially when building the
> profiling libraries.
> In the case of highlighting-kate, there were really issues with the
> code: A huge list of words which ghc seemed to try to inline caused it
> consuming a lot of memory.
> But in the case of agda, it even fails with relatively small modules:
> https://buildd.debian.org/fetch.cgi?pkg=agda&arch=sparc&ver=2.2.6-3&stamp=1267334936&file=log&as=raw
> Now, looking at the memory gauge on my computer while compiling such a
> program with Cabal (which compiles all modules in one ghc call), it
> looks like it is steadily increasing. I’d expect ghc to free a lot of
> memory when it is done with a module, but this does not seem to be the
> case.
> Is this a bug (i.e. memory leak) in ghc or expected behavior?
> Is there a way to make Cabal build each module on its own?
> Are there any fixes or work-arounds?
> Greetings,
> Joachim
> --
> Joachim "nomeata" Breitner
> Debian Developer
>  nomeata at debian.org | ICQ# 74513189 | GPG-Keyid: 4743206C
>  JID: nomeata at joachim-breitner.de | http://people.debian.org/~nomeata
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