X-Git-Url: http://git.nguyen.vg/gitweb/?a=blobdiff_plain;f=tree.ml;h=8e5dbc72be1d145282b1d01af5425ce0d19de86b;hb=bf2b1a91300ace1e7e83bd78f868a269d86498f9;hp=0a1bddab6d68f9baf426dda2ca9533749f17e688;hpb=7b6e25ac7c3b4e06c8386c1090bb69ae97a47143;p=SXSI%2Fxpathcomp.git

diff --git a/tree.ml b/tree.ml
index 0a1bdda..8e5dbc7 100644
--- a/tree.ml
+++ b/tree.ml
@@ -176,7 +176,7 @@ let text_size t = text_size t.doc
 
 module MemUnion = Hashtbl.Make (struct 
       type t = Ptset.Int.t*Ptset.Int.t
-      let equal (x,y) (z,t) = x == z || y == t
+      let equal (x,y) (z,t) = x == z && y == t
       let equal a b = equal a b || equal b a
       let hash (x,y) =   (* commutative hash *)
 	let x = Uid.to_int (Ptset.Int.uid x)