From e5583aa23ddee103eda81a9c976e35433c5a8e82 Mon Sep 17 00:00:00 2001
From: Oleg Grenrus <oleg.grenrus@iki.fi>
Date: Tue, 9 Feb 2016 19:52:25 +0200
Subject: [PATCH] Try to compile with GHC 8.0.1

---
 .travis.yml        | 2 --
 Haxl/Core/Monad.hs | 1 +
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index b47d8d8..501b4fc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,8 +22,6 @@ matrix:
     - env: CABALVER=1.24 GHCVER=8.0.1
       compiler: ": #GHC 8.0.1"
       addons: {apt: {packages: [cabal-install-1.24,ghc-8.0.1], sources: [hvr-ghc]}}
-  allow_failures:
-    - env: CABALVER=1.24 GHCVER=8.0.1
 
 before_install:
  - unset CC
diff --git a/Haxl/Core/Monad.hs b/Haxl/Core/Monad.hs
index 081c9fd..30a5519 100644
--- a/Haxl/Core/Monad.hs
+++ b/Haxl/Core/Monad.hs
@@ -740,6 +740,7 @@ cachedComputation req haxl = GenHaxl $ \env ref -> do
   -- continuation: just try to evaluate the memo again.  We know it is
   -- already in the cache (because we just checked), so the computation
   -- will never be used.
+  retryMemo :: (Typeable (req a)) => req a -> GenHaxl u a
   retryMemo req =
    cachedComputation req (throw (CriticalError "retryMemo"))