LazyLoadHintPlugin: Two runtime errors with component wrapping (undefined components + TDZ violation)

[PatrikFurm]

Environment

• @nuxt/hints: v1.0.0-alpha.8
• Nuxt: v4.1.3
• Node.js: v22.18.0

Reproduction

Any Vue component that imports other .vue components triggers both errors.
No special configuration needed — a standard Nuxt 4 project with nuxt-csurf and auto-imported components is enough.

1. Install @nuxt/hints v1.0.0-alpha.8
2. Run nuxi dev
3. Open any page that renders a component with multiple child .vue imports

Bug 1 appears first. After patching composables.js (adding null guard), Bug 2 appears.

Describe the bug

The LazyLoadHintPlugin causes two separate runtime errors that prevent the dev server from starting.

Bug 1: Cannot read properties of undefined (reading 'setup')

__wrapImportedComponent in dist/runtime/lazy-load/composables.js does not guard against undefined components:

// composables.js:25-29
export function __wrapImportedComponent(component, componentName, importSource, importedBy) {
  if (component && component.name === "AsyncComponentWrapper") {
    return component;
  }
  const originalSetup = component.setup; // 💥 crashes if component is undefined

Bug 2: Can't access lexical declaration '__original___nuxt_component_X' before initialization

The LazyLoadHintPlugin transform generates code with a Temporal Dead Zone violation. It:

1. Renames imports from ComponentName → __original_ComponentName
2. Prepends wrapper statements before the import declarations

This produces:

// ❌ wrapper references __original_Foo BEFORE it's imported
const Foo = __wrapImportedComponent(__original_Foo, 'Foo', './Foo.vue', '...')
import __original_Foo from './Foo.vue'

The issue is in module.mjs:

m.prepend(wrapperStatements + "\n");

Workaround

Disable the lazy-load feature by commenting out in dist/module.mjs:

// addPlugin(resolver.resolve("./runtime/lazy-load/plugin.client"));
// addServerPlugin(resolver.resolve("./runtime/lazy-load/nitro.plugin"));
// nuxt.hook("modules:done", () => {
//   addBuildPlugin(LazyLoadHintPlugin, { client: false });
//   addBuildPlugin(LazyLoadHintPlugin, { server: false });
// });

All other features (Web Vitals, hydration debugging, third-party scripts, DevTools UI) work correctly.

Additional context

No response

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