From b43e370739eca5541c70ed44029587424544cc05 Mon Sep 17 00:00:00 2001
From: Kyrill Briantsev <kyrab@mail.ru>
Date: Thu, 12 Jan 2017 13:23:50 +0300
Subject: Prevent GHC API from doing optimization passes.

---
 haddock-api/src/Haddock.hs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/haddock-api/src/Haddock.hs b/haddock-api/src/Haddock.hs
index 6a784f48..547e22c2 100644
--- a/haddock-api/src/Haddock.hs
+++ b/haddock-api/src/Haddock.hs
@@ -398,7 +398,7 @@ withGhc' libDir flags ghcActs = runGhc (Just libDir) $ do
     ghcMode   = CompManager,
     ghcLink   = NoLink
     }
-  let dynflags'' = gopt_unset dynflags' Opt_SplitObjs
+  let dynflags'' = updOptLevel 0 $ gopt_unset dynflags' Opt_SplitObjs
   defaultCleanupHandler dynflags'' $ do
       -- ignore the following return-value, which is a list of packages
       -- that may need to be re-linked: Haddock doesn't do any
-- 
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