Pasting multi-line functions repeats their lines pointlessly #67364

Version

v26.13.0

Platform

Microsoft Windows NT 10.0.19045.0 x64

Subsystem

No response

What steps will reproduce the bug?

1. Open Node.
2. Paste:

Fib=I=>{// Iterative Fibonacci , I = Integer ≥ 0
	if(!Number.isInteger(I)||I<0)return'Please enter a positive integer or zero!'
	if(I===0||I===1)return I
	let a=0,b=1,c;--I;do{c=a+b;a=b;b=c}while(--I!==0)// # iterations = I-1
	return c
}// e.g. Fib(7) //➜ 13 , Fib(8) //➜ 21 , Fib(9) //➜ 34

You'll see that it looks like this:

node
Welcome to Node.js v26.13.0.
Type ".help" for more information.
Fib=I=>{// Iterative Fibonacci , I = Integer ≥ 0
Fib=I=>{// Iterative Fibonacci , I = Integer ≥ 0
Fib=I=>{// Iterative Fibonacci , I = Integer ≥ 0
| if(!Number.isInteger(I)||I<0)return'Please enter a positive integer
Fib=I=>{// Iterative Fibonacci , I = Integer ≥ 0
| if(!Number.isInteger(I)||I<0)return'Please enter a positive integer
Fib=I=>{// Iterative Fibonacci , I = Integer ≥ 0
| if(!Number.isInteger(I)||I<0)return'Please enter a positive integer
or zero!'
| if(I===0||I===1)return I
| let a=0,b=1,c;--I;do{c=a+b;a=b;b=c}while(--I!==0)// # iterations = I-1
| return c
| }// e.g. Fib(7) //➜ 13 , Fib(8) //➜ 21 , Fib(9) //➜ 34
[Function: Fib]

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

It happens every time.

What is the expected behavior? Why is that the expected behavior?

I expect it to work the way that it did in past versions of Node and also as the DevTools console works. Not repeat the same line like 5 times.

What do you see instead?

Lines being repeated, 3 times, 5 times, etc.

Additional information

No response