REPL: when there's error using 'let' to define and initiate variable, that variable is no longer usable

[hermit99]

Version

v17.3.0

Platform

Microsoft Windows NT 10.0.19042.0 x64

Subsystem

No response

What steps will reproduce the bug?

Example1:

let a = x // => Uncaught ReferenceError: x is not defined
a // Uncaught ReferenceError: a is not defined
let a // Uncaught SyntaxError: Identifier 'a' has already been declared

Example2:

let o = { x: 1 }
let a = o.keys() // => Uncaught TypeError: o.keys is not a function
a // Uncaught ReferenceError: a is not defined
let a = Object.keys(o) // Uncaught SyntaxError: Identifier 'a' has already been declared

How often does it reproduce? Is there a required condition?

Always

What is the expected behavior?

When there are errors during variable initialization, the variable (a) should be undefined

What do you see instead?

Either Uncaught ReferenceError: a is not defined or Uncaught SyntaxError: Identifier 'a' has already been declared, if trying to redefine a

Additional information

Also tested on node.js v16.9.1, same error

[mscdex]

Duplicate of #8309.