From 5b73992d8f82be7ac4b6f46c17f53ffb9640e5fa Mon Sep 17 00:00:00 2001
From: Yegappan Lakshmanan <yegappan@yahoo.com>
Date: Sat, 10 Jul 2021 13:15:41 +0200
Subject: patch 8.2.3135: Vim9: builtin function arguments not checked at
 compile time

Problem:    Vim9: builtin function arguments not checked at compile time.
Solution:   Add more type checks. (Yegappan Lakshmanan, closes #8539)
---
 src/channel.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/channel.c')

diff --git a/src/channel.c b/src/channel.c
index 65757f1d7..c0572d331 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -1311,6 +1311,11 @@ channel_open_func(typval_T *argvars)
     jobopt_T    opt;
     channel_T	*channel = NULL;
 
+    if (in_vim9script()
+	    && (check_for_string_arg(argvars, 0) == FAIL
+		|| check_for_dict_arg(argvars, 1) == FAIL))
+	return NULL;
+
     address = tv_get_string(&argvars[0]);
     if (argvars[1].v_type != VAR_UNKNOWN
 	 && (argvars[1].v_type != VAR_DICT || argvars[1].vval.v_dict == NULL))
-- 
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