Is it not possible to call an inline lambda with another inline lambda as argument? Conceptually I think it should be, but I guess the compiler does not actually support it? I get an

illegal usage of inline argument block

error

Conceptually it works, only if body is `crossinline`d and the parameter of enter is `inline`d too (which is not the case here)

I don't actually, so you can ignore the concept of this function

Still, it's something that could be implemented by the compiler.