patch 8.2.3335: Vim9: not enough tests run with Vim9 Commit: https://github.com/vim/vim/commit/ef98257593a0abf1300d0f70358dc45a70a62580 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Aug 12 19:27:57 2021 +0200 patch 8.2.3335: Vim9: not enough tests run with Vim9 Problem: Vim9: not enough tests run with Vim9. Solution: Run a few more tests in Vim9 script and :def function. Fix that items(), keys() and values9) return zero for a NULL dict. Make join() return an empty string for a NULL list. Make sort() return an empty list for a NULL list.

--- a/src/dict.c
+++ b/src/dict.c
@@ -1209,11 +1209,12 @@ dict_list(typval_T *argvars, typval_T *r
 	emsg(_(e_dictreq));
 	return;
     }
-    if ((d = argvars[0].vval.v_dict) == NULL)
-	return;
 
     if (rettv_list_alloc(rettv) == FAIL)
 	return;
+    if ((d = argvars[0].vval.v_dict) == NULL)
+	// empty dict behaves like an empty dict
+	return;
 
     todo = (int)d->dv_hashtab.ht_used;
     for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)