No Unsafe Finally - Denoland

Disallows the use of control flow statements within finally blocks.

Use of the control flow statements (return, throw, break and continue) overrides the usage of any control flow statements that might have been used in the try or catch blocks, which is usually not the desired behaviour.

Invalid:

typescript

let foo = function () {
  try {
    return 1;
  } catch (err) {
    return 2;
  } finally {
    return 3;
  }
};

typescript

let foo = function () {
  try {
    return 1;
  } catch (err) {
    return 2;
  } finally {
    throw new Error();
  }
};

Valid:

typescript

let foo = function () {
  try {
    return 1;
  } catch (err) {
    return 2;
  } finally {
    console.log("hola!");
  }
};