From 1b850d37f42d58d1c4ad1454d80ecf33797bc467 Mon Sep 17 00:00:00 2001
From: Derrick Stolee <dstolee@microsoft.com>
Date: Thu, 1 Apr 2021 01:49:43 +0000
Subject: checkout-index: ensure full index

Before we iterate over all cache entries, ensure that the index is not
sparse. This loop in checkout_all() might be safe to iterate over a
sparse index, but let's put this protection here until it can be
carefully tested.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Reviewed-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/checkout-index.c b/builtin/checkout-index.c
index 023e49e..2c2936a 100644
--- a/builtin/checkout-index.c
+++ b/builtin/checkout-index.c
@@ -119,6 +119,8 @@ static void checkout_all(const char *prefix, int prefix_length)
 	int i, errs = 0;
 	struct cache_entry *last_ce = NULL;
 
+	/* TODO: audit for interaction with sparse-index. */
+	ensure_full_index(&the_index);
 	for (i = 0; i < active_nr ; i++) {
 		struct cache_entry *ce = active_cache[i];
 		if (ce_stage(ce) != checkout_stage
-- 
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