# HG changeset patch
# User glx22 <glx@openttd.org>
# Date 2022-08-23 14:50:59
# Node ID 7c7912ebd301915c35f94833d45fee81b3141dd6
# Parent  734cb9682af14245c79ce65373c2d3bb11a30d56

Fix #9974, aa5a8fe: strftime buffer maxsize is off by one

strftime() return value doesn't count NULL character, but buffer size must include it.

diff --git a/src/walltime_func.h b/src/walltime_func.h
--- a/src/walltime_func.h
+++ b/src/walltime_func.h
@@ -65,7 +65,7 @@ struct Time {
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wformat-nonliteral"
 #endif /* _MSC_VER */
-		return strftime(buffer, last - buffer, format, &time_struct);
+		return strftime(buffer, last - buffer + 1, format, &time_struct);
 #ifndef _MSC_VER
 #pragma GCC diagnostic pop
 #endif /* _MSC_VER */