Make pprNameLoc more robust in absence of loc information

[ghc-hetmet.git] / compiler / basicTypes / IdInfo.lhs

diff --git a/compiler/basicTypes/IdInfo.lhs b/compiler/basicTypes/IdInfo.lhs
index c1a69b2..e64e255 100644 (file)
--- a/compiler/basicTypes/IdInfo.lhs
+++ b/compiler/basicTypes/IdInfo.lhs
@@ -12,7 +12,7 @@ Haskell. [WDP 94/11])
 -- The above warning supression flag is a temporary kludge.
 -- While working on this module you are encouraged to remove it and fix
 -- any warnings in the module. See
---     http://hackage.haskell.org/trac/ghc/wiki/CodingStyle#Warnings
+--     http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
 -- for details
 
 module IdInfo (
@@ -704,11 +704,11 @@ zapLamInfo info@(IdInfo {occInfo = occ, newDemandInfo = demand})
        -- The "unsafe" occ info is the ones that say I'm not in a lambda
        -- because that might not be true for an unsaturated lambda
     is_safe_occ (OneOcc in_lam _ _) = in_lam
-    is_safe_occ other              = True
+    is_safe_occ _other             = True
 
     safe_occ = case occ of
                 OneOcc _ once int_cxt -> OneOcc insideLam once int_cxt
-                other                 -> occ
+                _other                -> occ
 
     is_safe_dmd Nothing    = True
     is_safe_dmd (Just dmd) = not (isStrictDmd dmd)
@@ -724,9 +724,13 @@ zapDemandInfo info@(IdInfo {newDemandInfo = dmd})
 \begin{code}
 zapFragileInfo :: IdInfo -> Maybe IdInfo
 -- Zap info that depends on free variables
-zapFragileInfo info = Just (info `setSpecInfo` emptySpecInfo
-                                `setWorkerInfo` NoWorker
-                                 `setUnfoldingInfo` NoUnfolding)
+zapFragileInfo info 
+  = Just (info `setSpecInfo` emptySpecInfo
+              `setWorkerInfo` NoWorker
+               `setUnfoldingInfo` NoUnfolding
+              `setOccInfo` if isFragileOcc occ then NoOccInfo else occ)
+  where
+    occ = occInfo info
 \end{code}
 
 %************************************************************************