hash-eql: regression: always returns zero.

* hash.c (hash_eql): Use hash_traversal_limit for
the initial value of the limit rather than zero.
Commit 84e9903c27ede099e2361e15b16a05c6aa4dc819 in October
2019 fixed eql_hash to actually make use of the limit, which
broke the assumption that we could use zero.

* tests/010/hash.tl: Add a few tests for hash-equal and
hash-eql.

2 files changed, 7 insertions, 1 deletions

diff --git a/hash.c b/hash.c
index 86b980b2..7ebe95a7 100644
--- a/hash.c
+++ b/hash.c
@@ -1418,7 +1418,7 @@ val maphash(val fun, val hash)
 
 val hash_eql(val obj)
 {
-  int lim = 0;
+  int lim = hash_traversal_limit;
   return num_fast(eql_hash(obj, &lim));
 }
 
diff --git a/tests/010/hash.tl b/tests/010/hash.tl
index b2e8d891..d6a8542b 100644
--- a/tests/010/hash.tl
+++ b/tests/010/hash.tl
@@ -86,3 +86,9 @@
   (mtest
     (hash-isec h1 h2) #H(() (b 2) (c 3) (d 4))
     [hash-isec h1 h2 +] #H(() (b 0) (c 0) (d 0))))
+
+(mtest
+  (eql (hash-equal "abc") (hash-equal "abc")) t
+  (eql (hash-equal (expt 2 128)) (hash-equal (expt 2 128))) t
+  (eql (hash-eql "abc") (hash-eql "abc")) nil
+  (eql (hash-eql (expt 2 128)) (hash-eql (expt 2 128))) t)