Merge branch 'rc/v1.4.0'

commercialhaskell · Mar 9, 2017 · 5c9ca3c · 5c9ca3c
2 parents 203b319 + e714f1d
commit 5c9ca3c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/Stack/Build/ConstructPlan.hs b/src/Stack/Build/ConstructPlan.hs
@@ -281,7 +281,7 @@ mkUnregisterLocal tasks dirtyReason localDumpPkgs sourceMap =
       -- If we're planning on running a task on it, then it must be
       -- unregistered
       | Just _ <- Map.lookup name tasks
-          = Just $ fromMaybe undefined $ Map.lookup name dirtyReason
+          = Just $ fromMaybe "" $ Map.lookup name dirtyReason
       -- Check if we're no longer using the local version
       | Just (PSUpstream _ Snap _ _ _) <- Map.lookup name sourceMap
           = Just "Switching to snapshot installed package"