wip: exclude legacy slots from $scopedSlots

packages/compiler-core/src/transforms/vSlot.ts

@@ -129,11 +129,6 @@ export function buildSlots(
   const slotsProperties: Property[] = []
   const dynamicSlots: (ConditionalExpression | CallExpression)[] = []
 
-  const buildDefaultSlotProperty = (
-    props: ExpressionNode | undefined,
-    children: TemplateChildNode[]
-  ) => createObjectProperty(`default`, buildSlotFn(props, children, loc))
-
   // If the slot is inside a v-for or another v-slot, force it to be dynamic
   // since it likely uses a scope variable.
   let hasDynamicSlots = context.scopes.vSlot > 0 || context.scopes.vFor > 0
@@ -302,6 +297,17 @@ export function buildSlots(
   }
 
   if (!onComponentSlot) {
+    const buildDefaultSlotProperty = (
+      props: ExpressionNode | undefined,
+      children: TemplateChildNode[]
+    ) => {
+      const fn = buildSlotFn(props, children, loc)
+      if (__COMPAT__) {
+        fn.isNonScopedSlot = true
+      }
+      return createObjectProperty(`default`, fn)
+    }
+
     if (!hasTemplateSlots) {
       // implicit default slot (on component)
       slotsProperties.push(buildDefaultSlotProperty(undefined, children))