Invalid left-hand side in assignment

[randalpinto]

What version of Next.js are you using?

11.1.2

What version of Node.js are you using?

12.22.1

What browser are you using?

Chrome

What operating system are you using?

MacOS

How are you deploying your application?

Other platform

Describe the Bug

When packaging up my application for serverless deployment the following code:

https://github.com/vercel/next.js/blob/canary/packages/next/server/next-server.ts#L295

gets packaged up to:

true = JSON.stringify(true);

which results in the following exception at runtime:

"/var/task/chunks/602.js:429285",
        "            true = JSON.stringify(true);",
        "            ^^^^",
        "",
        "SyntaxError: Invalid left-hand side in assignment",
        "    at wrapSafe (internal/modules/cjs/loader.js:988:16)",
        "    at Module._compile (internal/modules/cjs/loader.js:1036:27)",
        "    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1101:10)",
        "    at Module.load (internal/modules/cjs/loader.js:937:32)",
        "    at Function.Module._load (internal/modules/cjs/loader.js:778:12)",
        "    at Module.require (internal/modules/cjs/loader.js:961:19)",
        "    at require (internal/modules/cjs/helpers.js:92:18)",
        "    at Object.__webpack_require__.f.require (/var/task/pages/api/test.js:495:28)",
        "    at /var/task/pages/api/test.js:418:40",
        "    at Array.reduce (<anonymous>)"

Expected Behavior

No exception

To Reproduce

I am deploying my app using: https://github.com/serverless-nextjs/serverless-next.js

A simple API route that returns 200 OK results in this error.

[PatrickChoDev]

isn't true the JavaScript and TypeScript restricted words?
https://www.typescriptlang.org/docs/handbook/2/everyday-types.html