Here’s a program that makes a stack trace:

var dog = {};
dog.bark = function() {
  throw new Error('woof woof');
};
function makeStack() {
  try {
    dog.bark();
  } catch (error) {
    return error.stack;
  }
}
makeStack();

This is what QuickJS makes:

    at <anonymous> (file.js:3)
    at makeStack (file.js:7)
    at <eval> (file.js:12)

And Chrome:

Error: woof woof
    at Object.dog.bark (file.js:3:9)
    at makeStack (file.js:7:9)
    at file.js:12:1

And Firefox:

dog.bark@file.js eval code:3:9
makeStack@file.js eval code:7:9
@file.js eval code:12:1

Both Chrome and Firefox include dog.bark in the stack trace, but in QuickJS this function is <anonymous>.

Getting the function name in the output is super handy. This example is trivial, but my real program has deep stacks full of <anonymous> and it slows down debugging.