mkIfaceExports: sort the children of AvailTC

[ghc-hetmet.git] / compiler / iface / MkIface.lhs

diff --git a/compiler/iface/MkIface.lhs b/compiler/iface/MkIface.lhs
index 4ab1161..8c1b2a0 100644 (file)
--- a/compiler/iface/MkIface.lhs
+++ b/compiler/iface/MkIface.lhs
@@ -847,7 +847,8 @@ mkIfaceExports exports
                -- Usually just one, but see Note [Original module]
 
        add_for_mod env mod
-           = add_one env mod (AvailTC tc_occ names_from_mod)
+           = add_one env mod (AvailTC tc_occ (sort names_from_mod))
+              -- NB. sort the children, we need a canonical order
            where
              names_from_mod = [nameOccName n | n <- ns, nameModule n == mod]
 \end{code}