From c6ad0d9c061aee3b503d3e0703a1eb5469539c09 Mon Sep 17 00:00:00 2001
From: Kevin Backhouse <kevinbackhouse@github.com>
Date: Sun, 10 Oct 2021 12:21:17 +0100
Subject: [PATCH] Credit to OSS-Fuzz:
 https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=39555 Comment out bogus
 code.

---
 xmpsdk/src/XMPUtils.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/xmpsdk/src/XMPUtils.cpp b/xmpsdk/src/XMPUtils.cpp
index af41c18791..554ee13023 100644
--- a/xmpsdk/src/XMPUtils.cpp
+++ b/xmpsdk/src/XMPUtils.cpp
@@ -175,8 +175,11 @@ static bool
 IsLeapYear ( long year )
 {
 
+// Fix for https://github.com/Exiv2/exiv2/issues/1954:
+// This code looks bogus, and it can also cause an integer overflow, so comment it out.
+#if 0
 	if ( year < 0 ) year = -year + 1;		// Fold the negative years, assuming there is a year 0.
-
+#endif
 	if ( (year % 4) != 0 ) return false;	// Not a multiple of 4.
 	if ( (year % 100) != 0 ) return true;	// A multiple of 4 but not a multiple of 100.
 	if ( (year % 400) == 0 ) return true;	// A multiple of 400.