# \[PATCH 13/27\] merge-index: ensure full index

- From: Derrick Stolee via GitGitGadget \<hidden\>
- Date: 2021-03-16 21:18:26 
- List: git
- Page: https://ratatoskr.run/git/2021/03/7880212
- Thread: https://ratatoskr.run/git/2021/03/7880207/t.md

```text
From: Derrick Stolee <redacted>

Before iterating over all cache entries, ensure that a sparse index is
expanded to a full one to avoid unexpected behavior.

Signed-off-by: Derrick Stolee <redacted>
---
 builtin/merge-index.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/builtin/merge-index.c b/builtin/merge-index.c
index 38ea6ad6ca25..c1c4409b536d 100644
--- a/builtin/merge-index.c
+++ b/builtin/merge-index.c
@@ -58,6 +58,7 @@ static void merge_one_path(const char *path)
 static void merge_all(void)
 {
 	int i;
+	ensure_full_index(&the_index);
 	for (i = 0; i < active_nr; i++) {
 		const struct cache_entry *ce = active_cache[i];
 		if (!ce_stage(ce))
@@ -80,6 +81,8 @@ int cmd_merge_index(int argc, const char **argv, const char *prefix)
 
 	read_cache();
 
+	ensure_full_index(&the_index);
+
 	i = 1;
 	if (!strcmp(argv[i], "-o")) {
 		one_shot = 1;
-- 
gitgitgadget

```