Fix has(nan) on arrays to output false

src/jv_aux.c

@@ -214,10 +214,14 @@ jv jv_has(jv t, jv k) {
     jv_free(elem);
   } else if (jv_get_kind(t) == JV_KIND_ARRAY &&
              jv_get_kind(k) == JV_KIND_NUMBER) {
-    jv elem = jv_array_get(t, (int)jv_number_value(k));
-    ret = jv_bool(jv_is_valid(elem));
+    if (jvp_number_is_nan(k)) {
+      ret = jv_false();
+    } else {
+      jv elem = jv_array_get(t, (int)jv_number_value(k));
+      ret = jv_bool(jv_is_valid(elem));
+      jv_free(elem);
+    }
     jv_free(k);
-    jv_free(elem);
   } else {
     ret = jv_invalid_with_msg(jv_string_fmt("Cannot check whether %s has a %s key",
                                             jv_kind_name(jv_get_kind(t)),

tests/jq.test

@@ -1389,6 +1389,10 @@ map(has(2))
 [[0,1], ["a","b","c"]]
 [false, true]
 
+has(nan)
+[0,1,2]
+false
+
 keys
 [42,3,35]
 [0,1,2]