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-rw-r--r--builtin/sparse-checkout.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/builtin/sparse-checkout.c b/builtin/sparse-checkout.c
index 9ccdcde983..6580075a63 100644
--- a/builtin/sparse-checkout.c
+++ b/builtin/sparse-checkout.c
@@ -598,6 +598,9 @@ static void add_patterns_cone_mode(int argc, const char **argv,
die(_("unable to load existing sparse-checkout patterns"));
free(sparse_filename);
+ if (!existing.use_cone_patterns)
+ die(_("existing sparse-checkout patterns do not use cone mode"));
+
hashmap_for_each_entry(&existing.recursive_hashmap, &iter, pe, ent) {
if (!hashmap_contains_parent(&pl->recursive_hashmap,
pe->pattern, &buffer) ||