What does it mean if console.log(4) outputs undefined in Chrome Console?

Question

I used the Chrome Console to write a simple statement:

console.log(4)

and received the Output:

4

Answer 1

I've tested it and even with a preset variable it did not work in my Safari:

i = 2;
console.log(i);

This seems to explain the bug that WebKit (engine of both Chrome and Safari) has: Link