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-rw-r--r--builtin/diff-tree.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/builtin/diff-tree.c b/builtin/diff-tree.c
index d66499909e..b775a75647 100644
--- a/builtin/diff-tree.c
+++ b/builtin/diff-tree.c
@@ -110,6 +110,8 @@ int cmd_diff_tree(int argc, const char **argv, const char *prefix)
git_config(git_diff_basic_config, NULL); /* no "diff" UI options */
init_revisions(opt, prefix);
+ if (read_cache() < 0)
+ die(_("index file corrupt"));
opt->abbrev = 0;
opt->diff = 1;
opt->disable_stdin = 1;