> b call_bar
> r
> s
> s
> bt
* thread #1, [..] stop reason = step in
  * frame #0: [..]`kfun:Foo#bar(){}kotlin.String-trampoline at kt61131-2.kt:20:5
    frame #1: [..]`kfun:#call_bar(foo=[..]){} at kt61131-1.kt:9:18
    frame #2: [..]`kfun:#main(){} at kt61131-1.kt:15:5
    frame #3: [..]`Konan_start(args=[..]) at [..]
    frame #4: [..]
    frame #5: [..]
> s
> bt
* thread #1, [..] stop reason = step in
  * frame #0: [..]`kfun:FooImpl#bar(_this=[..]]){}kotlin.String at kt61131-1.kt:5:14
    frame #1: [..]`kfun:Foo#bar(){}kotlin.String-trampoline at kt61131-2.kt:20:5
    frame #2: [..]`kfun:#call_bar(foo=[..]){} at kt61131-1.kt:9:18
    frame #3: [..]`kfun:#main(){} at kt61131-1.kt:15:5
    frame #4: [..]`Konan_start(args=[..]) at [..]
    frame #5: [..]
    frame #6: [..]
> q