# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1596831304 -7200
# Node ID bb4f55d2095148ad16c21f7e67c9151b7fb97bcd
# Parent  5e20df737eb4acfefc37e96698ae08a6ec5cbafa
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)

diff --git a/src/testdir/test_vim9_script.vim b/src/testdir/test_vim9_script.vim
--- 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()
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1391,
+/**/
     1390,
 /**/
     1389,
diff --git a/src/vim9compile.c b/src/vim9compile.c
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -5462,6 +5462,8 @@ compile_assignment(char_u *arg, exarg_T 
 			semsg(_(e_unknown_var), name);
 			goto theend;
 		    }
+		    else if (check_defined(var_start, varlen, cctx) == FAIL)
+			goto theend;
 		}
 	    }