From 030c63afd6a727cde7ab7dfbd5887cb1c4d310bf Mon Sep 17 00:00:00 2001
From: Andy Heninger <andy.heninger@gmail.com>
Date: Thu, 2 Jun 2016 19:39:40 +0000
Subject: [PATCH] ICU-12559 avoid signed int overflow in hash computation; it's
 undefined behavior.

X-SVN-Rev: 38782
---
 icu4c/source/common/unifiedcache.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/icu4c/source/common/unifiedcache.h b/icu4c/source/common/unifiedcache.h
index 35dabbb535c..16c18b0cfb6 100644
--- a/icu4c/source/common/unifiedcache.h
+++ b/icu4c/source/common/unifiedcache.h
@@ -140,7 +140,7 @@ class LocaleCacheKey : public CacheKey<T> {
            : CacheKey<T>(other), fLoc(other.fLoc) { }
    virtual ~LocaleCacheKey() { }
    virtual int32_t hashCode() const {
-       return 37 *CacheKey<T>::hashCode() + fLoc.hashCode();
+       return (int32_t)(37u * (uint32_t)CacheKey<T>::hashCode() + (uint32_t)fLoc.hashCode());
    }
    virtual UBool operator == (const CacheKeyBase &other) const {
        // reflexive
-- 
2.40.0