fix warn

Author: hello-coder-xu

packages/flutter/.vscode/launch.json

@@ -0,0 +1,60 @@
+{
+    // 使用 IntelliSense 了解相关属性。 
+    // 悬停以查看现有属性的描述。
+    // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "test",
+            "cwd": "test_private/test",
+            "request": "launch",
+            "type": "dart"
+        },
+        {
+            "name": "test (profile mode)",
+            "cwd": "test_private/test",
+            "request": "launch",
+            "type": "dart",
+            "flutterMode": "profile"
+        },
+        {
+            "name": "test (release mode)",
+            "cwd": "test_private/test",
+            "request": "launch",
+            "type": "dart",
+            "flutterMode": "release"
+        },
+        {
+            "name": "test_private",
+            "cwd": "test_private",
+            "request": "launch",
+            "type": "dart"
+        },
+        {
+            "name": "flutter",
+            "request": "launch",
+            "type": "dart"
+        },
+        {
+            "name": "flutter (profile mode)",
+            "request": "launch",
+            "type": "dart",
+            "flutterMode": "profile"
+        },
+        {
+            "name": "flutter (release mode)",
+            "request": "launch",
+            "type": "dart",
+            "flutterMode": "release"
+        },
+        {
+            "name": "flutter test(update-goldens)",
+            "request": "launch",
+            "type": "dart",
+            "program": "test",
+            "args": [
+              "--update-goldens"
+            ]
+        },
+    ]
+}

packages/flutter/test/material/slider_theme_test.dart

@@ -2652,7 +2652,7 @@ void main() {
       (WidgetTester tester) async {
     debugDisableShadows = false;
     try {
-      final List<SliderComponentShape> shapes = [
+      final List<SliderComponentShape> shapes = <SliderComponentShape>[
         const PaddleSliderValueIndicatorShape(),
         const DropSliderValueIndicatorShape(),
         const RectangularSliderValueIndicatorShape(),