Util.Exn
val pp_stack : Stdlib.Buffer.t -> int -> unit
printer for the stack with given depth
val fmt_stack : Stdlib.Format.formatter -> int -> unit
val pp_backtrace : Stdlib.Buffer.t -> unit -> unit
printer for backtraces, if enabled (print nothing otherwise)
val fmt_backtrace : Stdlib.Format.formatter -> unit -> unit
val string_of_backtrace : unit -> string