1 files changed, 4 insertions, 1 deletions
diff --git a/array.c b/array.c
index b517fa3abb..a53554ba2d 100644
--- a/array.c
+++ b/array.c
@@ -306,6 +306,9 @@ ary_subseq(ary, beg, len)
 	beg = RARRAY(ary)->len + beg;
 	if (beg < 0) beg = 0;
     }
+    if (beg >= RARRAY(ary)->len) {
+	IndexError("out of range %d", beg);
+    }
     if (len < 0) {
 	IndexError("negative length %d", RARRAY(ary)->len);
     }
@@ -1164,7 +1167,7 @@ ary_uniq_bang(ary)
 	}
 	end = t;
     }
-    if (RARRAY(ary)->len = (end - RARRAY(ary)->ptr)) {
+    if (RARRAY(ary)->len == (end - RARRAY(ary)->ptr)) {
 	return Qnil;
     }