patch 8.2.1306: checking for first character of dict key is inconsistent Commit: https://github.com/vim/vim/commit/b13ab99908097d54e21ab5adad22f4ad2a8ec688 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Jul 27 21:43:28 2020 +0200 patch 8.2.1306: checking for first character of dict key is inconsistent Problem: Checking for first character of dict key is inconsistent. Solution: Add eval_isdictc(). (closes https://github.com/vim/vim/issues/6546)

--- a/src/testdir/test_listdict.vim
+++ b/src/testdir/test_listdict.vim
@@ -282,6 +282,13 @@ func Test_dict_func()
   call assert_equal('xxx3', Fn('xxx'))
 endfunc
 
+func Test_dict_assign()
+  let d = {}
+  let d.1 = 1
+  let d._ = 2
+  call assert_equal({'1': 1, '_': 2}, d)
+endfunc
+
 " Function in script-local List or Dict
 func Test_script_local_dict_func()
   let g:dict = {}