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(* Open Source License                                                       *)
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(** [check_null_ptr exn ptr] raises [exn msg] if [ptr] is a null pointer where
    [msg] is the last Wasmer error message. *)
val check_null_ptr : (string -> exn) -> 'a Ctypes.ptr -> unit

(** [last_error ()] retrieves the last Wasmer error. *)
val last_error : unit -> string