patch 8.2.4313: Vim9: cannot change type of list after making a slice Commit: https://github.com/vim/vim/commit/5f4ef5f5e5529c147c2274cd0f6416e2546d6fc7 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Feb 6 18:36:53 2022 +0000 patch 8.2.4313: Vim9: cannot change type of list after making a slice Problem: Vim9: cannot change type of list after making a slice. Solution: Adjust the declared member type. (closes https://github.com/vim/vim/issues/9696)

--- a/src/testdir/test_vim9_builtin.vim
+++ b/src/testdir/test_vim9_builtin.vim
@@ -3626,6 +3626,7 @@ def Test_slice()
 
   var lds: list<dict<string>> = [{key: 'value'}]
   assert_equal(['val'], lds->slice(0, 1)->map((_, v) => 'val'))
+  assert_equal(['val'], lds[ : ]->map((_, v) => 'val'))
 
   assert_equal(0z1122334455, slice(0z001122334455, 1))
   assert_equal(0z112233, slice(0z001122334455, 1, 4))