From 08e18e265dfb7e6e77c32244f56acd0f63bf4ead Mon Sep 17 00:00:00 2001
From: Kemal <223029+disq@users.noreply.github.com>
Date: Fri, 4 Oct 2024 10:48:52 +0100
Subject: [PATCH] fix(tests): WriterTestSuite.handleNulls should not overwrite
 columns (#1920)

---
 plugin/nulls.go | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/plugin/nulls.go b/plugin/nulls.go
index 0332a09820..21dfa82726 100644
--- a/plugin/nulls.go
+++ b/plugin/nulls.go
@@ -93,10 +93,11 @@ func (s *WriterTestSuite) replaceNullsByEmptyNestedArray(arr arrow.Array) arrow.
 
 func (s *WriterTestSuite) handleNulls(record arrow.Record) arrow.Record {
 	cols := record.Columns()
+	newCols := make([]arrow.Array, len(cols))
 	for c, col := range cols {
-		cols[c] = s.handleNullsArray(col)
+		newCols[c] = s.handleNullsArray(col)
 	}
-	return array.NewRecord(record.Schema(), cols, record.NumRows())
+	return array.NewRecord(record.Schema(), newCols, record.NumRows())
 }
 
 func (s *WriterTestSuite) handleNullsArray(arr arrow.Array) arrow.Array {