I uninstalled, reinstalled , did a cabal install of haddock then ghc-core and threadscope and saw no errors so I guess we are fine as long as the next version includes the latest haddock. I notice on the 7.10.2 active tickets page there is a ticket saying that 7.10.2 needs the latest haddock.

On Tue, Jun 2, 2015 at 1:01 PM, George Colpitts <george.colpitts@gmail.com> wrote:

Yes

ghc --print-libdir
/Library/Frameworks/GHC.framework/Versions/7.10.1.20150601-x86_64/usr/lib/ghc-7.10.1.20150601
bash-3.2$

On Tue, Jun 2, 2015 at 10:22 AM, Mark Lentczner <mark.lentczner@gmail.com> wrote:
On Tue, Jun 2, 2015 at 4:40 AM, George Colpitts <george.colpitts@gmail.com> wrote:
I guess I should file a haddock bug as I got the same error installing threadscope

Does ghc --print-libdir display the correct path? (That is, with the full version number.)

- Mark