X-Git-Url: https://git.xandkar.net/?p=tiger.ml.git;a=blobdiff_plain;f=compiler%2Fsrc%2Flib%2Ftiger%2Ftiger_env_type.ml;h=a2e719f37d5d8e315a63e4ce715ba18596d10e69;hp=4d99a0d7e8dc2313e9db1ba8f69ad5158311de89;hb=cbb4ffb6428f52eaea42f6039332af0c392cdd0f;hpb=d5517328dcf93c5bd74f1895262e47b70d2e4313

diff --git a/compiler/src/lib/tiger/tiger_env_type.ml b/compiler/src/lib/tiger/tiger_env_type.ml
index 4d99a0d..a2e719f 100644
--- a/compiler/src/lib/tiger/tiger_env_type.ml
+++ b/compiler/src/lib/tiger/tiger_env_type.ml
@@ -45,7 +45,10 @@ let new_array ty =
 
 let is_equal t1 t2 =
   match t1, t2 with
+  | Name   (s1, _)       ,  Name   (s2, _)        -> Symbol.is_equal s1 s2
   | Record {unique=u1; _},  Record {unique=u2; _} -> u1 == u2
+  | Record _             ,  Nil                   -> true
+  | Nil                  ,  Record _              -> true
   | Array  {unique=u1; _},  Array  {unique=u2; _} -> u1 == u2
   | t1                   , t2                     -> t1 =  t2
   (* The above pattern matching is "fragile" and I'm OK with it.