"SyntaxError: Identifier has already been declared" but "ReferenceError: is not defined"

[omerl13]

• Version: 13.12.0
• Platform: Windows 10 64-bit
• Subsystem: 1909

What steps will reproduce the bug?

Running the following:

c:\>node
Welcome to Node.js v13.12.0.
Type ".help" for more information.
> let a = b
Uncaught ReferenceError: b is not defined
> let a = 2
Uncaught SyntaxError: Identifier 'a' has already been declared
> a = 2
Uncaught ReferenceError: a is not defined

Uncaught ReferenceError: a is not defined

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

Always

What is the expected behavior?

Probably same as Chrome devtools:

let a = b
VM54:1 Uncaught ReferenceError: b is not defined
    at <anonymous>:1:9
(anonymous) @ VM54:1
a = 2
VM70:1 Uncaught ReferenceError: Cannot access 'a' before initialization
    at <anonymous>:1:3
(anonymous) @ VM70:1
let a = 2 \\ works

What do you see instead?

See "What steps will reproduce the bug?" section

Additional information

Found this similar question on SO: https://stackoverflow.com/questions/41395939/is-not-defined-and-identifier-has-already-been-declared-at-the-same-time

[devsnek]

Duplicate of #8441 #8376 #8309 #16520 #14092