test: add failing test pending upstream vue fix

test/basic.test.ts

@@ -596,6 +596,15 @@ describe('navigate', () => {
   })
 })
 
+describe('preserves current instance', () => {
+  it('should not return getCurrentInstance when there\'s an error in data', async () => {
+    await fetch('/instance/error')
+    const html = await $fetch('/instance/next-request')
+    // TODO: this needs to be fixed upstream in Vue: https://github.com/vuejs/core/issues/7733, https://github.com/vuejs/core/pull/7743
+    expect(html).not.toContain('This should be false: false')
+  })
+})
+
 describe('errors', () => {
   it('should render a JSON error page', async () => {
     const res = await fetch('/error', {

test/fixtures/basic/pages/instance/error.vue

@@ -0,0 +1,13 @@
+<script lang="ts">
+export default defineComponent({
+  data () {
+    throw new Error('💀')
+  }
+})
+</script>
+
+<template>
+  <div>
+    This should not display.
+  </div>
+</template>

test/fixtures/basic/pages/instance/next-request.vue

@@ -0,0 +1,5 @@
+<template>
+  <div>
+    This should be false: {{ $wasVueAppInstanceWronglyPreserved }}
+  </div>
+</template>

test/fixtures/basic/plugins/context-error.ts

@@ -0,0 +1,9 @@
+export default defineNuxtPlugin(() => {
+  // this should be undefined
+  const vueApp = getCurrentInstance()
+  return {
+    provide: {
+      wasVueAppInstanceWronglyPreserved: !!vueApp
+    }
+  }
+})