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Invalid identity escape in regex does not throw when unicode flag is on #10442

JLHwung opened this issue Sep 15, 2019 · 1 comment


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commented Sep 15, 2019

Bug Report

Current Behavior
When unicode flag is enabled, invalid identity escape does not throw.

Input Code


Expected behavior/code
A syntax error should be thrown.

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

  "plugin": ["@babel/transform-unicode-regex"]


  • Babel version(s): v7.5.5
  • How you are using Babel: repl

Possible Solution
It is an upstream issue.


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commented Sep 15, 2019

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.

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