A modern programming language that makes developers happier.

kotlinlang

<@U0ZFBBUBU> Take a look at this example: <https://try.kotlinlang.org/#/UserProjects/q1qp3un899nd41tcall8qmapg5/9kedig2qt02lre65kj8jt9eqan>
What is different from your code?

ilya.gorbunov: Oh, of course, the obvious bit. try 

```
override fun fillInStackTrace(): Throwable{
  println(trace.lines())
}
```

So why can't you move that code from `fillInStackTrace` to `init`?

because I'm trying to modify the stack trace...

and I had it in my head that you can only do that from `fillInStackTrace` but thats not right, thats just a performance optimization

if I do it from init it'l cause the JVM to build the stack trace once, then over-write that result, which means I burn a little CPU time, but no other problems

or no, thats not right either, I can simply override `fillInStackTrace` to no-op, then `setStackTrace` in the init call

sorry I'm really confused with this API, thanks Ilya.