patch 8.2.1391: Vim9: no error for shadowing a script function Commit: https://github.com/vim/vim/commit/fa211f3c6d27cf962b28f10e3c18b12dde4d20c3 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Aug 7 22:00:26 2020 +0200 patch 8.2.1391: Vim9: no error for shadowing a script function Problem: Vim9: no error for shadowing a script function. Solution: Check for already defined items. (closes https://github.com/vim/vim/issues/6652)

--- a/src/testdir/test_vim9_script.vim
+++ b/src/testdir/test_vim9_script.vim
@@ -1780,6 +1780,18 @@ def Test_func_redefine_fails()
     enddef
   END
   CheckScriptFailure(lines, 'E1073:')
+
+  lines =<< trim END
+    vim9script
+    def Foo(): string
+      return 'foo'
+      enddef
+    def Func()
+      let  Foo = {-> 'lambda'}
+    enddef
+    defcompile
+  END
+  CheckScriptFailure(lines, 'E1073:')
 enddef
 
 def Test_fixed_size_list()