import std.stdio: writeln;

import std.algorithm: cartesianProduct;

auto r = cartesianProduct([1, 2, 3], [10, 20, 30]); // object.Error: Access Violation

void main() {

    //auto r = cartesianProduct([1, 2, 3], [10, 20, 30]); // OK

    r.writeln;

}