[@babel/parser@7.12.1]: unexpected SyntaxError omitted from function params destructuring

[shhider]

Bug Report

Common object deconstruction code:

interface ISomeObj {
  prop1: string;
  prop2: string;
}

const clone = (
  { prop1, prop2 }: ISomeObj,
): ISomeObj => ({ prop1, prop2 });

but babel/parser@7.12.1:

/repl.ts: Unexpected token (8:0)

  6 | const clone = (
  7 |   { prop1, prop2 }: ISomeObj,
> 8 | ): ISomeObj => ({ prop1, prop2 });
    | ^
  9 | 

You can try it in babel website Try It Out.

And,

There is no error if param has only one prop:

interface ISomeObj {
  prop1: string;
  prop2: string;
}

const clone = (
  { prop1 }: ISomeObj,
): ISomeObj => ({ prop1 });

This bug blocks my development, please fix it ASAP.

[babel-bot]

Hey @shhider! 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."

[nicolo-ribaudo]

I reverted the commit that introduced the regression and released it as @babel/parser@7.12.2.

[shhider]

Appreciate!