Fix bug

Author: lunny

services/pull/comment.go

@@ -5,6 +5,7 @@ package pull
 
 import (
 	"context"
+	"fmt"
 
 	issues_model "code.gitea.io/gitea/models/issues"
 	repo_model "code.gitea.io/gitea/models/repo"
@@ -52,6 +53,10 @@ func CreatePushPullComment(ctx context.Context, pusher *user_model.User, pr *iss
 		return nil, nil
 	}
 
+	if err := pr.LoadIssue(ctx); err != nil {
+		return nil, fmt.Errorf("unable to load issue for PR[%d]: %w", pr.ID, err)
+	}
+
 	opts := &issues_model.CreateCommentOptions{
 		Type:        issues_model.CommentTypePullRequestPush,
 		Doer:        pusher,