commit 215c3261a25f7a99e8711a3b3c6158119c6aea9e
author Ken Takata <kentkt@csc.jp> Mon Oct 16 09:57:43 2023 +0200
committer Christian Brabandt <cb@256bit.org> Mon Oct 16 09:57:43 2023 +0200
tree 6ba5f52dbbab4b9e6cdee451a143cd637ae1e02c
parent dbf749bd5aaef6ea2d28bce081349785d174d96a

patch 9.0.2033: gcc overflow-warning for f_resolve

Problem:  gcc overflow-warning for f_resolve
Solution: use pointer p instead of pointer q[-1]

Suppress the following warning:
```
filepath.c: In function ‘f_resolve’:
filepath.c:2162:27: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
 2162 |                     q[-1] = NUL;
```

Closes: #13352
closes: #13353

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Ken Takata <kentkt@csc.jp>

src/filepath.c

diff --git a/src/filepath.c b/src/filepath.c
index c30d9bf..1ea0623 100644
--- a/src/filepath.c
+++ b/src/filepath.c
@@ -2159,7 +2159,7 @@
 		if (q > p && *q == NUL)
 		{
 		    // Ignore trailing path separator.
-		    q[-1] = NUL;
+		    p[q - p - 1] = NUL;
 		    q = gettail(p);
 		}
 		if (q > p && !mch_isFullName(buf))