Github user nongli commented on a diff in the pull request:
https://github.com/apache/spark/pull/10120#discussion_r46515840
--- Diff:
sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
---
@@ -445,7 +450,13 @@ public UTF8String getUTF8String(int ordinal) {
final long offsetAndSize = getLong(ordinal);
final int offset = (int) (offsetAndSize >> 32);
final int size = (int) offsetAndSize;
- return UTF8String.fromAddress(baseObject, baseOffset + offset, size);
+ final UTF8String str = UTF8String.fromAddress(baseObject, baseOffset +
offset, size);
--- End diff --
also check size >= 0
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