proposal-logical-assignment should not assign anonymous function name

[JLHwung]

Bug Report

• I would like to work on a fix!

Current Behavior
The following snippet, after transform will print string "f" to the console

Input Code

• REPL

var f;
console.log((f ??= function() {}).name)

Expected behavior/code
According to https://tc39.es/proposal-logical-assignment/#sec-assignment-operators-runtime-semantics-evaluation, the anonymous function is not applied with NamedEvaluation, so it should print an empty string to the console.

Babel Configuration (babel.config.js, .babelrc, package.json#babel, cli command, .eslintrc)

• Filename: babel.config.js

{
  "plugins": ["@babel/proposal-logical-assignment-operators"]
}

Environment
REPL.

Solution
Transform f ??= function() {} to f = f ?? function() {} may fix this issue. Or we leave a caveat note that we are not supporting function name in this plugin.

[babel-bot]

Hey @JLHwung! We really appreciate you taking the time to report an issue. The collaborators on this project attempt to help as many people as possible, but we're a limited number of volunteers, so it's possible this won't be addressed swiftly.

If you need any help, or just have general Babel or JavaScript questions, we have a vibrant Slack community that typically always has someone willing to help. You can sign-up here for an invite."

[arku]

@JLHwung I would like to take a stab at this issue.