From 2cadd6051a7cc6c1322a2346a6101248a9412964 Mon Sep 17 00:00:00 2001
From: Zehua Zou <zehuazou2000@gmail.com>
Date: Thu, 30 Jul 2026 01:06:58 +0800
Subject: [PATCH] fix valgrind use of uninitialised value on
 FixedSizeListTestCase

---
 cpp/src/parquet/arrow/arrow_reader_writer_test.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/cpp/src/parquet/arrow/arrow_reader_writer_test.cc b/cpp/src/parquet/arrow/arrow_reader_writer_test.cc
index 3fcc4ac49c1a..2bdbc38b3647 100644
--- a/cpp/src/parquet/arrow/arrow_reader_writer_test.cc
+++ b/cpp/src/parquet/arrow/arrow_reader_writer_test.cc
@@ -3419,6 +3419,10 @@ struct FixedSizeListTestCase {
   std::string json;
 };
 
+void PrintTo(const FixedSizeListTestCase& test_case, std::ostream* os) {
+  *os << "{type=" << test_case.type->ToString() << ", json=" << test_case.json << "}";
+}
+
 class TestFixedSizeListRoundTrip
     : public ::testing::TestWithParam<FixedSizeListTestCase> {};