1906150 - Improve Error messaging & stack traces for SuppressedErrors

Status: NEW

(Core :: JavaScript Engine, enhancement, P3)

Comment 1

[Debadree Chatterjee]

The general consensus regarding this is this should either point to the closing brace of the scope / copy the trace of .error ref [1] but presently our implementation captures the position of the first suppressed error example

{
  using x = {
    [Symbol.dispose]() {
      console.log('disposed 1');
      throw 1;
    }
  }
  using y = {
    [Symbol.dispose]() {
      console.log('disposed 2');
      throw 2;
    }
  }
}

results in:

 0:00.53 js test.js
disposed 2
disposed 1
test.js:9:5 SuppressedError: An error is suppressed because another error happened while disposing an object
Stack:
  @test.js:9:5

so this can be improved it would essentially involving tweaking the try finally blocks that surround the disposals

[1] https://github.com/tc39/proposal-explicit-resource-management/issues/235