Bug Report

• I would like to work on a fix!

Current Behavior
A clear and concise description of the behavior.

The following snippet will throw SyntaxError: Unexpected token, expected ","
Input Code

• REPL or Repo link if applicable: REPL

({ a = 42, b: {}.d } = {})

Expected behavior/code
It should parse successfully.

Babel Configuration (babel.config.js, .babelrc, package.json#babel, cli command, .eslintrc): No plugin.

Environment
REPL

Possible Solution
We may reset refExpressionErrors.shortAssign when parsing Assignment Expression after eating tt.colon in parseObjectProperty.