commit 00a749bd90e6b84e7e5132691d73fe9aa3fdff05
author zeertzjq <zeertzjq@outlook.com> Sat Mar 15 09:53:32 2025 +0100
committer Christian Brabandt <cb@256bit.org> Sat Mar 15 09:53:32 2025 +0100
tree 00ebb88bf4cda80abb476c32aa1976b64402ae87
parent 96395e15125502e6c29bc93c58d688a2bdc31300

patch 9.1.1204: MS-Windows: crash when passing long string to expand()

Problem:  MS-Windows: crash when passing long string to expand() with
          'wildignorecase'.
Solution: Use the same buflen as unix_expandpath() in dos_expandpath().
          Remove an unnecessary STRLEN() while at it (zeertzjq).

closes: #16896

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/testdir/test_expand_func.vim

diff --git a/src/testdir/test_expand_func.vim b/src/testdir/test_expand_func.vim
index 112809a..1570048 100644
--- a/src/testdir/test_expand_func.vim
+++ b/src/testdir/test_expand_func.vim
@@ -141,4 +141,11 @@
   set wildignore&
 endfunc
 
+" Passing a long string to expand with 'wildignorecase' should not crash Vim.
+func Test_expand_long_str()
+  set wildignorecase
+  call expand('a'->repeat(99999))
+  set wildignorecase&
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab