import Prim "mo:⛔";

actor a {

    public query func ok(): async () {
        throw Prim.error("abcdefgh");
    };
    public query func crash(): async () {
        throw Prim.error("abcdefgh" # "i");
    };
};

ignore a.ok(); //OR-CALL query ok "DIDL\x00\x00"
ignore a.crash(); //OR-CALL query crash "DIDL\x00\x00"