commit 5c6edf41f9beffea21ce45d658822cc4c0745fdb
author Cam Sinclair <csinkers@gmail.com> Fri Feb 25 17:42:23 2022 +0000
committer Bram Moolenaar <Bram@vim.org> Fri Feb 25 17:42:23 2022 +0000
tree c5f2c4400cd8ee1a5aa792439c8680b6881beff1
parent 5ec633b9b0400519db60253cb5846e50394218b4

patch 8.2.4466: MS-Windows: illegal memory access in installer

Problem:    MS-Windows: illegal memory access in installer when using
            "create-directories" as the final argument.
Solution:   Check the argument count. (Cam Sinclair, closes #9844)

src/dosinst.c

diff --git a/src/dosinst.c b/src/dosinst.c
index 608f381..e77152f 100644
--- a/src/dosinst.c
+++ b/src/dosinst.c
@@ -2495,7 +2495,7 @@
 	    int vimfiles_dir_choice = (int)vimfiles_dir_none;
 
 	    init_directories_choice();
-	    if (argv[i + 1][0] != '-')
+	    if (i + 1 < argc && argv[i + 1][0] != '-')
 	    {
 		i++;
 		if (strcmp(argv[i], "vim") == 0)