Parcel 2 does assignment to undeclared variable when importing bundle text a certain way

[danieltroger]

🐛 bug report

Output with --no-optimize:

(function () {
  $18334e130dafe2913541baf4ea7ba145$exports = "<!-- this is sum html-->\n  <h1>Hi I'm HTML</h1>\n";
  console.log($18334e130dafe2913541baf4ea7ba145$exports);
})();

Optimized output:

$18334e130dafe2913541baf4ea7ba145$exports="<h1>Hi I'm HTML</h1>",console.log($18334e130dafe2913541baf4ea7ba145$exports);

As you can see this will throw an error in strict mode and therefore is a bug. It happens when doing this: export * as template from "bundle-text:./html.html";

🎛 Configuration (.babelrc, package.json, cli command)

Please see the attached .zip file and don't forget to fix #5755

🤔 Expected Behavior

console.log("<h1>Hi I'm HTML</h1>");

([the function that takes an argument and returns the argument.default or the argument] wrapped around the string is also acceptable, I think it's called interopDefault)

😯 Current Behavior

Parcel gets confused and forgets to declare the variable with const.

💁 Possible Solution

Put const before $18334e130dafe2913541baf4ea7ba145$exports

🔦 Context

Coworker wanted to show me how to import things without writing

import template_html from "bundle-text:./html.html
export const template = template_html

I didn't believe him it would work and I was kind of right. (I mean it does but not in strict mode and terser doesn't mangle the variable name)

💻 Code Sample

parcel-doesnt-declare-its-variables.zip

🌍 Your Environment

Software	Version(s)
Parcel	2.0.0-nightly.643+3baf990a
Node	v15.14.0
npm/Yarn	npm v7.7.6
Operating System	macOS 10.15.7 (19H524)