fix(compiler-core/v-on): bail caching for member expression handlers on components

to preserve correct arity when it is passed down.
fix #1541

packages/compiler-core/__tests__/transforms/vOn.spec.ts

@@ -13,7 +13,7 @@ import { transformElement } from '../../src/transforms/transformElement'
 import { transformExpression } from '../../src/transforms/transformExpression'
 
 function parseWithVOn(template: string, options: CompilerOptions = {}) {
-  const ast = parse(template)
+  const ast = parse(template, options)
   transform(ast, {
     nodeTransforms: [transformExpression, transformElement],
     directiveTransforms: {
@@ -405,6 +405,15 @@ describe('compiler: transform v-on', () => {
       })
     })
 
+    test('bail on component member expression handler', () => {
+      const { root } = parseWithVOn(`<comp v-on:click="foo" />`, {
+        prefixIdentifiers: true,
+        cacheHandlers: true,
+        isNativeTag: tag => tag === 'div'
+      })
+      expect(root.cached).toBe(0)
+    })
+
     test('inline function expression handler', () => {
       const { root, node } = parseWithVOn(`<div v-on:click="() => foo()" />`, {
         prefixIdentifiers: true,