From fa1039760e8c1a0c7a2a722160bd3d71a4736e61 Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Thu, 29 Sep 2022 19:14:42 +0100
Subject: patch 9.0.0623: error for modifying a const is not detected at
 compile time

Problem:    Error for modifying a const is not detected at compile time.
Solution:   Add TTFLAG_CONST and check for it in add() and extend().
---
 src/testdir/test_vim9_script.vim | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'src/testdir/test_vim9_script.vim')

diff --git a/src/testdir/test_vim9_script.vim b/src/testdir/test_vim9_script.vim
index 54b4ea16d0..fd07fbfaee 100644
--- a/src/testdir/test_vim9_script.vim
+++ b/src/testdir/test_vim9_script.vim
@@ -2471,10 +2471,11 @@ def Test_for_loop_fails()
   lines =<< trim END
       var l: list<dict<any>> = [{n: 1}]
       for item: dict<number> in l
-        item->extend({s: ''})
+        var d = {s: ''}
+        d->extend(item)
       endfor
   END
-  v9.CheckDefExecAndScriptFailure(lines, 'E1013: Argument 2: type mismatch, expected dict<number> but got dict<string>')
+  v9.CheckDefExecAndScriptFailure(lines, 'E1013: Argument 2: type mismatch, expected dict<string> but got dict<number>')
 
   lines =<< trim END
       for a in range(3)
-- 
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