From 1353369fbb3722d0b98dfffb758158ed330957e3 Mon Sep 17 00:00:00 2001
From: zeertzjq <zeertzjq@outlook.com>
Date: Sat, 16 Jul 2022 14:00:10 +0800
Subject: [PATCH] fix(ex_cmds): correct flags for :const

(cherry picked from commit 0a7e0304c797b7700304b8614a24ad9bcd7e9c6b)
---
 src/nvim/ex_cmds.lua                   |  2 +-
 test/functional/vimscript/let_spec.lua | 17 +++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/nvim/ex_cmds.lua b/src/nvim/ex_cmds.lua
index c2d40c8bb7..32dbed2e2e 100644
--- a/src/nvim/ex_cmds.lua
+++ b/src/nvim/ex_cmds.lua
@@ -629,7 +629,7 @@ module.cmds = {
   },
   {
     command='const',
-    flags=bit.bor(NEEDARG, EXTRA, NOTRLCOM, CMDWIN),
+    flags=bit.bor(EXTRA, NOTRLCOM, SBOXOK, CMDWIN),
     addr_type='ADDR_NONE',
     func='ex_const',
   },
diff --git a/test/functional/vimscript/let_spec.lua b/test/functional/vimscript/let_spec.lua
index 509846450c..50d70e7563 100644
--- a/test/functional/vimscript/let_spec.lua
+++ b/test/functional/vimscript/let_spec.lua
@@ -5,6 +5,7 @@ local clear = helpers.clear
 local command = helpers.command
 local eval = helpers.eval
 local meths = helpers.meths
+local exec = helpers.exec
 local exec_capture = helpers.exec_capture
 local source = helpers.source
 local testprg = helpers.testprg
@@ -91,3 +92,19 @@ describe(':let', function()
     eq(1, eval('1'))
   end)
 end)
+
+describe(':let and :const', function()
+  it('have the same output when called without arguments', function()
+    eq(exec_capture('let'), exec_capture('const'))
+  end)
+
+  it('can be used in sandbox', function()
+    exec([[
+      func Func()
+        let l:foo = 'foo'
+        const l:bar = 'bar'
+      endfunc
+      sandbox call Func()
+    ]])
+  end)
+end)