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-rw-r--r--builtin/difftool.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/builtin/difftool.c b/builtin/difftool.c
index ef25729d49..0202a43052 100644
--- a/builtin/difftool.c
+++ b/builtin/difftool.c
@@ -585,6 +585,9 @@ static int run_dir_diff(const char *extcmd, int symlinks, const char *prefix,
setenv("GIT_DIFFTOOL_DIRDIFF", "true", 1);
rc = run_command_v_opt(helper_argv, flags);
+ /* TODO: audit for interaction with sparse-index. */
+ ensure_full_index(&wtindex);
+
/*
* If the diff includes working copy files and those
* files were modified during the diff, then the changes