💻

• Would you like to work on a fix?

How are you using Babel?

Other (Next.js, Gatsby, vue-cli, ...)

Input code

this doesn't parse

but this does:

function assert(condition: any): asserts condition {}

Configuration file name

No response

Configuration

No response

Current and expected behavior

parsing should match typescript

Environment

babel repl

Possible solution

No response

Additional context

No response