git-describe: --long shows the object name even for a tagged commit

diff --git a/shallow.c b/shallow.c
index ab975482d0571fa4b647bb3bc9f5032947dc0f3e..4d90eda19efe0a80c1cb39e8897ab3ed5e6fcf56 100644 (file)
--- a/shallow.c
+++ b/shallow.c
@@ -56,7 +56,7 @@ struct commit_list *get_shallow_commits(struct object_array *heads, int depth,
                        if (i < heads->nr) {
                                commit = (struct commit *)
                                        deref_tag(heads->objects[i++].item, NULL, 0);
-                               if (commit->object.type != OBJ_COMMIT) {
+                               if (!commit || commit->object.type != OBJ_COMMIT) {
                                        commit = NULL;
                                        continue;
                                }