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diff src/testdir/test_vim9_assign.vim @ 22545:47596deedfb5 v8.2.1821

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patch 8.2.1821: Vim9: concatenating to a NULL list doesn't work Commit: https://github.com/vim/vim/commit/1a73923705744ab8297dd856d194e20297563456 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Oct 10 15:37:58 2020 +0200 patch 8.2.1821: Vim9: concatenating to a NULL list doesn't work Problem: Vim9: concatenating to a NULL list doesn't work. Solution: Handle a NULL list like an empty list. (closes https://github.com/vim/vim/issues/7064)
author Bram Moolenaar <Bram@vim.org>
date Sat, 10 Oct 2020 15:45:03 +0200
parents 4c21f7f6f9e3
children a3df1fb28d44
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line diff
--- a/src/testdir/test_vim9_assign.vim
+++ b/src/testdir/test_vim9_assign.vim
@@ -236,6 +236,18 @@ def Test_extend_list()
       assert_equal(#{one: 1}, d)
   END
   CheckScriptSuccess(lines)
+
+  # appending to NULL list from a function
+  lines =<< trim END
+      vim9script
+      var list: list<string>
+      def Func()
+        list += ['a', 'b']
+      enddef
+      Func()
+      assert_equal(['a', 'b'], list)
+  END
+  CheckScriptSuccess(lines)
 enddef
 
 def Test_single_letter_vars()