lens that fails to focus raises no signals about monocle-ts HOT 4 CLOSED

import { Lens, fromTraversable, Prism } from "monocle-ts";
import { array } from "fp-ts/lib/Array";

const lensData = {
  a: {
    b: {
      c: {
        d: 3,
      },
    },
    p: [
      {
        id: 1,
        name: "Jack",
      },
      {
        id: 2,
        name: "Jon",
      },
      {
        id: 3,
        name: "Jay",
      },
    ],
  },
};

try {
  const r = Lens.fromProp<any>()("a")
    .composeLens(Lens.fromProp<any>()("p"))
    .composeTraversal(fromTraversable(array)<any>())
    .composePrism(Prism.fromPredicate((child: any) => child.id === 4))
    .modify((child) => ({ ...child, name: "Josh" }))(lensData);

  console.log("Failed prism returned old value silently");
  console.log(JSON.stringify(r, null, 2));

  const r2 = Lens.fromProp<any>()("a")
    .composeLens(Lens.fromProp<any>()("p"))
    .composeTraversal(fromTraversable(array)<any>())
    .composePrism(Prism.fromPredicate((child: any) => child.id === 2))
    .modify((child) => ({ ...child, name: "Josh" }))(lensData);

  console.log("Successfully prism modified value of a -> p -> id = 2 from Jon to Josh");
  console.log(JSON.stringify(r2, null, 2));
} catch (e) {
  console.log("Caught error");
}

Failed prism returned old value silently
{
  "a": {
    "b": {
      "c": {
        "d": 3
      }
    },
    "p": [
      {
        "id": 1,
        "name": "Jack"
      },
      {
        "id": 2,
        "name": "Jon"
      },
      {
        "id": 3,
        "name": "Jay"
      }
    ]
  }
}
Successfully prism modified value of a -> p -> id = 2 from Jon to Josh
{
  "a": {
    "b": {
      "c": {
        "d": 3
      }
    },
    "p": [
      {
        "id": 1,
        "name": "Jack"
      },
      {
        "id": 2,
        "name": "Josh"
      },
      {
        "id": 3,
        "name": "Jay"
      }
    ]
  }
}
Done in 0.99s.