Merge branch 'jc/maint-rev-list-culled-boundary' into maint

* jc/maint-rev-list-culled-boundary:
  list-objects.c: don't add an unparsed NULL as a pending tree

Conflicts:
	list-objects.c

2 files changed, 33 insertions, 1 deletions

diff --git a/list-objects.c b/list-objects.c
index 8953548c07..44fa5a92e2 100644
--- a/list-objects.c
+++ b/list-objects.c
@@ -148,7 +148,12 @@ void traverse_commit_list(struct rev_info *revs,
 	struct commit *commit;
 
 	while ((commit = get_revision(revs)) != NULL) {
-		add_pending_tree(revs, commit->tree);
+		/*
+		 * an uninteresting boundary commit may not have its tree
+		 * parsed yet, but we are not going to show them anyway
+		 */
+		if (commit->tree)
+			add_pending_tree(revs, commit->tree);
 		show_commit(commit, data);
 	}
 	for (i = 0; i < revs->pending.nr; i++) {
diff --git a/t/t6110-rev-list-sparse.sh b/t/t6110-rev-list-sparse.sh
new file mode 100755
index 0000000000..2a267e84cd
--- /dev/null
+++ b/t/t6110-rev-list-sparse.sh
@@ -0,0 +1,27 @@
+#!/bin/sh
+
+test_description='operations that cull histories in unusual ways'
+. ./test-lib.sh
+
+test_commit () {
+	echo "$1" >"$1.file" &&
+	git add "$1.file" &&
+	test_tick &&
+	git commit -m "$1"
+}
+
+test_expect_success setup '
+	test_commit A &&
+	test_commit B &&
+	test_commit C &&
+	git checkout -b side HEAD^ &&
+	test_commit D &&
+	test_commit E &&
+	git merge master
+'
+
+test_expect_success 'rev-list --first-parent --boundary' '
+	git rev-list --first-parent --boundary HEAD^..
+'
+
+test_done