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Diffstat (limited to 'builtin/diff-tree.c')
-rw-r--r--builtin/diff-tree.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/builtin/diff-tree.c b/builtin/diff-tree.c
index 91ba670..d07bf2e 100644
--- a/builtin/diff-tree.c
+++ b/builtin/diff-tree.c
@@ -163,9 +163,11 @@ int cmd_diff_tree(int argc, const char **argv, const char *prefix)
int saved_nrl = 0;
int saved_dcctc = 0;
- if (opt->diffopt.detect_rename)
- opt->diffopt.setup |= (DIFF_SETUP_USE_SIZE_CACHE |
- DIFF_SETUP_USE_CACHE);
+ if (opt->diffopt.detect_rename) {
+ if (!the_index.cache)
+ read_index(&the_index);
+ opt->diffopt.setup |= DIFF_SETUP_USE_SIZE_CACHE;
+ }
while (fgets(line, sizeof(line), stdin)) {
struct object_id oid;