From c57500bda55f61936c9d3afb701d42e92fc8508b Mon Sep 17 00:00:00 2001
From: Darren Carreras <283775510+carrerasdarren-cell@users.noreply.github.com>
Date: Mon, 27 Jul 2026 22:13:09 -0400
Subject: [PATCH] liblzma: Preserve check statistics in lzma_index_dup()

lzma_index_dup() copied the per-Stream flags but not the cached bitmask
for all Streams except the last one. As a result, lzma_index_checks() on
a duplicated multi-Stream Index reported only the Check type of its
final Stream.

Fixes: https://github.com/tukaani-project/xz/pull/238
---
 src/liblzma/common/index.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/liblzma/common/index.c b/src/liblzma/common/index.c
index c4aadb9b..4d641f9b 100644
--- a/src/liblzma/common/index.c
+++ b/src/liblzma/common/index.c
@@ -974,6 +974,7 @@ lzma_index_dup(const lzma_index *src, const lzma_allocator *allocator)
 	dest->total_size = src->total_size;
 	dest->record_count = src->record_count;
 	dest->index_list_size = src->index_list_size;
+	dest->checks = src->checks;
 
 	// Copy the Streams and the groups in them.
 	const index_stream *srcstream