From 5fd9e2b3e5448ccc00c735873c3315fe7381907c Mon Sep 17 00:00:00 2001
From: Burkov Egor <eburkov@rvision.ru>
Date: Thu, 13 Mar 2025 10:11:19 +0300
Subject: [PATCH] ICU-23074 Add nullptr check for `UCharsTrie::next`

---
 icu4c/source/common/ucharstrie.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/icu4c/source/common/ucharstrie.cpp b/icu4c/source/common/ucharstrie.cpp
index 4c48323c917..0e6e0852e9c 100644
--- a/icu4c/source/common/ucharstrie.cpp
+++ b/icu4c/source/common/ucharstrie.cpp
@@ -177,7 +177,7 @@ UCharsTrie::next(int32_t uchar) {
 UStringTrieResult
 UCharsTrie::next(ConstChar16Ptr ptr, int32_t sLength) {
     const char16_t *s=ptr;
-    if(sLength<0 ? *s==0 : sLength==0) {
+    if(s==nullptr || (sLength<0 ? *s==0 : sLength==0)) {
         // Empty input.
         return current();
     }