From: Derrick Stolee <dstolee@xxxxxxxxxxxxx>
The cache_bottom member of 'struct unpack_trees_options' is used to
track the range of index entries corresponding to a node of the cache
tree. While recursing with traverse_by_cache_tree(), this value is
preserved on the call stack using a local and then restored as that
method returns.
The mark_ce_used() method normally modifies the cache_bottom member when
it refers to the marked cache entry. However, sparse directory entries
are stored as nodes in the cache-tree data structure as of 2de37c53
(cache-tree: integrate with sparse directory entries, 2021-03-30). Thus,
the cache_bottom will be modified as the cache-tree walk advances. Do
not update it as well within mark_ce_used().
Signed-off-by: Derrick Stolee <dstolee@xxxxxxxxxxxxx>
---
unpack-trees.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/unpack-trees.c b/unpack-trees.c
index f88a69f8e71..87c1ed204c8 100644
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -600,6 +600,13 @@ static void mark_ce_used(struct cache_entry *ce, struct unpack_trees_options *o)
{
ce->ce_flags |= CE_UNPACKED;
+ /*
+ * If this is a sparse directory, don't advance cache_bottom.
+ * That will be advanced later using the cache-tree data.
+ */
+ if (S_ISSPARSEDIR(ce->ce_mode))
+ return;
+
if (o->cache_bottom < o->src_index->cache_nr &&
o->src_index->cache[o->cache_bottom] == ce) {
int bottom = o->cache_bottom;
--
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