commit df9fee32dd219ae70b3e0c8d7a0bd95a8d063f68
from: Stefan Sperling <stsp@stsp.name>
date: Wed Jun 25 19:00:44 2025 UTC

fix looping in got-read-pack's version of repaint_parent_commits() as well

This can be observed during 'got send' or 'gotadmin pack/cleanup' in some
cases. We would keep processing the same parent commits over and over.

commit - 82bf4748c2294f02084474503c8929675108b220
commit + df9fee32dd219ae70b3e0c8d7a0bd95a8d063f68
blob - 6a99c87bcd4304e66565ac48ac46681c1e80c623
blob + d37eb5a0e5cefff82a8f7ed72c8d4a06d4513a8e
--- libexec/got-read-pack/got-read-pack.c
+++ libexec/got-read-pack/got-read-pack.c
@@ -1688,13 +1688,18 @@ repaint_parent_commits(struct got_object_id *commit_id
     struct got_pack *pack, struct got_packidx *packidx,
     struct got_object_cache *objcache)
 {
-	const struct got_error *err;
+	const struct got_error *err = NULL;
 	const struct got_object_id_queue *parents;
-	struct got_commit_object *commit;
+	struct got_commit_object *commit = NULL;
 	struct got_object_id_queue repaint;
+	struct got_object_idset *traversed;
 
 	STAILQ_INIT(&repaint);
 
+	traversed = got_object_idset_alloc();
+	if (traversed == NULL)
+		return got_error_from_errno("got_object_idset_alloc");
+
 	err = open_commit(&commit, pack, packidx, commit_idx, commit_id,
 	    objcache);
 	if (err)
@@ -1722,8 +1727,15 @@ repaint_parent_commits(struct got_object_id *commit_id
 				    got_object_idset_contains(skip, &pid->id))
 					continue;
 
+				if (got_object_idset_contains(traversed,
+				    &pid->id))
+					continue;
 				err = queue_commit_id(&repaint, &pid->id,
 				    color);
+				if (err)
+					goto done;
+				err = got_object_idset_add(traversed,
+				    &pid->id, NULL);
 				if (err)
 					goto done;
 			}
@@ -1793,6 +1805,7 @@ done:
 	if (commit)
 		got_object_commit_close(commit);
 	got_object_id_queue_free(&repaint);
+	got_object_idset_free(traversed);
 
 	return err;
 }