GitLab

Now completion suggests to remove only modules added to context before.

With gcc 4.5.0-1, using visibility hidden gives:
    error: visibility attribute not supported in this configuration; ignored

Joseph Jezak reported darcs-2.4.4 SIGSEGV in interactive mode in ghc-6.12.3.
So I've concluded ppc also has rotten native adjustor. I don't have hardware
to verify the patch (ticket #3516 should help to test it), but I think it will
help (as similar patch helped for ia64 and ppc64).

I'm not sure if this could lead to a crash or not, but it upsets +RTS -DS
Might be related to #4265

Stops user-installed packages breaking the build