Sort modules and packages in debug print (reduce test wobbles)

[ghc-hetmet.git] / compiler / typecheck / TcRnDriver.lhs

diff --git a/compiler/typecheck/TcRnDriver.lhs b/compiler/typecheck/TcRnDriver.lhs
index 2afe890..88695bc 100644 (file)
--- a/compiler/typecheck/TcRnDriver.lhs
+++ b/compiler/typecheck/TcRnDriver.lhs
@@ -82,6 +82,7 @@ import Outputable
 import DataCon
 import Type
 import Class
+import Data.List ( sortBy )
 
 #ifdef GHCI
 import Linker
@@ -1470,8 +1471,16 @@ pprTcGblEnv (TcGblEnv { tcg_type_env  = type_env,
         , ppr_fam_insts fam_insts
         , vcat (map ppr rules)
         , ppr_gen_tycons (typeEnvTyCons type_env)
-        , ptext (sLit "Dependent modules:") <+> ppr (eltsUFM (imp_dep_mods imports))
-        , ptext (sLit "Dependent packages:") <+> ppr (imp_dep_pkgs imports)]
+        , ptext (sLit "Dependent modules:") <+> 
+               ppr (sortBy cmp_mp $ eltsUFM (imp_dep_mods imports))
+        , ptext (sLit "Dependent packages:") <+> 
+               ppr (sortBy stablePackageIdCmp $ imp_dep_pkgs imports)]
+  where                -- The two uses of sortBy are just to reduce unnecessary
+               -- wobbling in testsuite output
+    cmp_mp (mod_name1, is_boot1) (mod_name2, is_boot2)
+       = (mod_name1 `stableModuleNameCmp` mod_name2)
+                 `thenCmp`     
+         (is_boot1 `compare` is_boot2)
 
 pprModGuts :: ModGuts -> SDoc
 pprModGuts (ModGuts { mg_types = type_env,