Fix assert fail when delpaths is given non-array (fix #901)

jv_aux.c

@@ -390,6 +390,11 @@ static jv delpaths_sorted(jv object, jv paths, int start) {
 }
 
 jv jv_delpaths(jv object, jv paths) {
+  if (jv_get_kind(paths) != JV_KIND_ARRAY) {
+    jv_free(object);
+    jv_free(paths);
+    return jv_invalid_with_msg(jv_string("Paths must be specified as an array"));
+  }
   paths = jv_sort(paths, jv_copy(paths));
   jv_array_foreach(paths, i, elem) {
     if (jv_get_kind(elem) != JV_KIND_ARRAY) {

tests/jq.test

@@ -756,6 +756,10 @@ delpaths([[-200]])
 [1,2,3]
 [1,2,3]
 
+try delpaths(0) catch .
+{}
+"Paths must be specified as an array"
+
 del(.), del(empty), del((.foo,.bar,.baz) | .[2,3,0]), del(.foo[0], .bar[0], .foo, .baz.bar[0].x)
 {"foo": [0,1,2,3,4], "bar": [0,1]}
 null