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ICU-23074 Add nullptr check for UCharsTrie::next #3434

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2 changes: 1 addition & 1 deletion icu4c/source/common/ucharstrie.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -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();
}
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