commit 46950b225fab2e10245a04952b2c238e0362e1b7
author Bram Moolenaar <Bram@vim.org> Fri Feb 04 11:36:51 2022 +0000
committer Bram Moolenaar <Bram@vim.org> Fri Feb 04 11:36:51 2022 +0000
tree 1bdb4e4bc41fead52bd426354b1440c29e0c2d0d
parent 972db232795874c58b9fdf23e43f53885a378eae

patch 8.2.4295: Vim9: concatenating two lists may result in wrong type

Problem:    Vim9: concatenating two lists may result in wrong type.
Solution:   Remove the type instead of using list<any>. (closes #9692)

src/testdir/test_vim9_expr.vim

diff --git a/src/testdir/test_vim9_expr.vim b/src/testdir/test_vim9_expr.vim
index a4e3e9e..cf4347c 100644
--- a/src/testdir/test_vim9_expr.vim
+++ b/src/testdir/test_vim9_expr.vim
@@ -1500,6 +1500,12 @@
       assert_equal([[1, 2]], lln)
   END
   v9.CheckDefAndScriptSuccess(lines)
+
+  lines =<< trim END
+      var ln: list<number> = [0]
+      var lln: list<list<number>> = [ln + []]
+  END
+  v9.CheckDefAndScriptSuccess(lines)
 enddef
 
 " test multiply, divide, modulo