SSR throws Syntax Error for valid JavaScript

[JeffSchofield]

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Describe the bug

Vite in library mode can produce minified code that looks something like this shape:

// some-library.es.js
import { inject as x } from 'vue'

function setup() {
	const { test: x } = { test: true }
}

The use of two x comes from the minifier doing its thing and should be valid. For some reason this shape (where x is used in two spots) causes the syntax error Illegal property in declaration context when instantiating the module at this line: https://github.com/vitejs/vite/blob/master/packages/vite/src/node/ssr/ssrModuleLoader.ts#L122.

I am not familiar with the internals but I believe that the syntax error is introduced at some point in this transform step: https://github.com/vitejs/vite/blob/master/packages/vite/src/node/ssr/ssrTransform.ts#L26

Reproduction

https://github.com/JeffSchofield/vite-ssr-bug

System Info

• vite version: 2.0.5
• Operating System: Windows 10 18363.1379
• Node version: 15.11.0
• Package manager (npm/yarn/pnpm) and version: yarn 1.22.10

[JeffSchofield]

I am certain this is an edge case in the SSR transformation step. Here is the transformed code that is throwing the error from my repro:

const __vite_ssr_import_0__ = __vite_ssr_import__("vue")


__vite_ssr_exports__.default = {
        install() {
                const { test: __vite_ssr_import_0__.inject } = { test: true }
                console.log(__vite_ssr_import_0__.inject)
        }
}

So it seems x is blanket replaced which is introducing the syntax error.