Adding nil check for repo.Owner

Author: AlanCitrix

github/resource_github_repository.go

@@ -838,7 +838,9 @@ func resourceGithubRepositoryRead(d *schema.ResourceData, meta any) error {
 	_ = d.Set("topics", flattenStringList(repo.Topics))
 	_ = d.Set("node_id", repo.GetNodeID())
 	_ = d.Set("repo_id", repo.GetID())
-	_ = d.Set("owner", repo.GetOwner().GetLogin())
+	if repo.Owner != nil {
+		_ = d.Set("owner", repo.Owner.GetLogin())
+	}
 
 	// GitHub API doesn't respond following parameters when repository is archived
 	if !d.Get("archived").(bool) {

github/resource_github_repository_test.go

@@ -2068,6 +2068,44 @@ func TestAccGithubRepository_fork(t *testing.T) {
 	})
 }
 
+func TestGithubRepositoryOwnerNilHandling(t *testing.T) {
+	d := schema.TestResourceDataRaw(t, resourceGithubRepository().Schema, map[string]any{
+		"name": "test-repo",
+	})
+	d.SetId("test-repo")
+
+	repo := &github.Repository{
+		Name:     github.String("test-repo"),
+		FullName: github.String("test-org/test-repo"),
+		Owner:    nil,
+	}
+
+	if repo.Owner != nil {
+		_ = d.Set("owner", repo.Owner.GetLogin())
+	}
+
+	owner, ok := d.GetOk("owner")
+	if ok && owner != "" {
+		t.Errorf("Expected owner to be empty when repo.Owner is nil, got: %v", owner)
+	}
+
+	repo.Owner = &github.User{
+		Login: github.String("test-owner"),
+	}
+
+	if repo.Owner != nil {
+		_ = d.Set("owner", repo.Owner.GetLogin())
+	}
+
+	owner, ok = d.GetOk("owner")
+	if !ok {
+		t.Error("Expected owner to be set when repo.Owner is not nil")
+	}
+	if owner != "test-owner" {
+		t.Errorf("Expected owner to be 'test-owner', got: %v", owner)
+	}
+}
+
 func createForkedRepository(repositoryName string) error {
 	config := Config{BaseURL: "https://api.github.com/", Owner: testOrganizationFunc(), Token: testToken}
 	meta, err := config.Meta()