Squash a space leak

diff --git a/compiler/rename/RnBinds.lhs b/compiler/rename/RnBinds.lhs
index 60d1a3e..a921924 100644 (file)
--- a/compiler/rename/RnBinds.lhs
+++ b/compiler/rename/RnBinds.lhs
@@ -495,11 +495,13 @@ rnBind _ trim (L loc (PatBind { pat_lhs = pat,
 
        ; (grhss', fvs) <- rnGRHSs PatBindRhs grhss
                -- No scoped type variables for pattern bindings
+       ; let fvs' = trim fvs
 
-       ; return (L loc (PatBind { pat_lhs = pat, 
+       ; fvs' `seq`
+      return (L loc (PatBind { pat_lhs = pat,
                                   pat_rhs = grhss', 
                                     pat_rhs_ty = placeHolderType, 
-                                  bind_fvs = trim fvs }), 
+                                  bind_fvs = fvs' }),
                  bndrs, pat_fvs `plusFV` fvs) }
 
 rnBind sig_fn 
@@ -517,13 +519,15 @@ rnBind sig_fn
        ; (matches', fvs) <- bindSigTyVarsFV (sig_fn plain_name) $
                                -- bindSigTyVars tests for Opt_ScopedTyVars
                             rnMatchGroup (FunRhs plain_name inf) matches
+       ; let fvs' = trim fvs
 
        ; checkPrecMatch inf plain_name matches'
 
-       ; return (L loc (FunBind { fun_id = name, 
+       ; fvs' `seq`
+      return (L loc (FunBind { fun_id = name,
                                   fun_infix = inf, 
                                   fun_matches = matches',
-                                    bind_fvs = trim fvs, 
+                                    bind_fvs = fvs',
                                   fun_co_fn = idHsWrapper, 
                                   fun_tick = Nothing }), 
                  [plain_name], fvs)