From db8125ebef6fd3e0fc886d2148106ad2f3980115 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=96=E7=95=8C?= <i@sekai.icu>
Date: Wed, 8 Jan 2025 11:04:24 +0800
Subject: [PATCH] listable: Fix incorrect unmarshaling of null to []T{null}

---
 common/json/badoption/listable.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/common/json/badoption/listable.go b/common/json/badoption/listable.go
index df02217e..3b57cedb 100644
--- a/common/json/badoption/listable.go
+++ b/common/json/badoption/listable.go
@@ -2,6 +2,7 @@ package badoption
 
 import (
 	"context"
+	"slices"
 
 	E "github.com/sagernet/sing/common/exceptions"
 	"github.com/sagernet/sing/common/json"
@@ -18,6 +19,9 @@ func (l Listable[T]) MarshalJSONContext(ctx context.Context) ([]byte, error) {
 }
 
 func (l *Listable[T]) UnmarshalJSONContext(ctx context.Context, content []byte) error {
+	if slices.Equal(content, []byte("null")) {
+		return nil
+	}
 	var singleItem T
 	err := json.UnmarshalContextDisallowUnknownFields(ctx, content, &singleItem)
 	if err == nil {