ghc-7.10 branch regression

George Colpitts george.colpitts at
Wed Apr 15 12:00:55 UTC 2015

I believe we need to do  b) Revert commit 07da52ce2d in the ghc-7.10 branch
and continue to use llvm-3.5 for the 7.10 series.

I think the plan is to require llvm-3.6 or a later version for 7.12.1 and

Ghc 7.10.1 only supports llvm 3.5 as stated in

I filed a doc bug on this yesterday,

On Wed, Apr 15, 2015 at 7:12 AM, Erik de Castro Lopo <mle+hs at>

> Erik de Castro Lopo wrote:
> > At this point we need to decide whether:
> >
> >    a) Require llvm-3.6 for 7.10.2 and later.
> I've done some testing on the ghc-7.10 branch (with a couple of patches
> cherry picked from master) with llvm-3.6 on amd64-linux. WIth this,
> there are 17 unexpected failures during validate:
>    deriving/should_fail       T7959 [stderr mismatch] (normal)
>    deriving/should_fail       drvfail005 [stderr mismatch] (normal)
>    deriving/should_fail       drvfail009 [stderr mismatch] (normal)
>    indexed-types/should_fail  SimpleFail14 [stderr mismatch] (normal)
>    simplCore/should_compile   spec-inline [stderr mismatch] (optasm)
>    typecheck/should_compile   T10195 [exit code non-0] (normal)
>    typecheck/should_fail      T2994 [stderr mismatch] (normal)
>    typecheck/should_fail      T3540 [stderr mismatch] (normal)
>    typecheck/should_fail      T7778 [stderr mismatch] (normal)
>    typecheck/should_fail      tcfail036 [stderr mismatch] (normal)
>    typecheck/should_fail      tcfail057 [stderr mismatch] (normal)
>    typecheck/should_fail      tcfail063 [stderr mismatch] (normal)
>    typecheck/should_fail      tcfail134 [stderr mismatch] (normal)
>    typecheck/should_fail      tcfail146 [stderr mismatch] (normal)
>    typecheck/should_fail      tcfail147 [stderr mismatch] (normal)
>    typecheck/should_fail      tcfail151 [stderr mismatch] (normal)
>    typecheck/should_fail      tcfail209 [stderr mismatch] (normal)
> All bit one oft these all seem to be stderr mismatches rather than
> actual problems.
> My validate run on armhf is still running.
> Erik
> --
> ----------------------------------------------------------------------
> Erik de Castro Lopo
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