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Dropped support for Lambda handler context callbacks #681

@Desuuuu

Description

@Desuuuu

Starting from version 126 of the Lambda layer, the following code does not work anymore:

exports.handler = function (event, context) {
    setTimeout(() => {
      context.succeed({ ok: true });
    }, 500);
};

This is arguably some very outdated code, but since the change wasn't documented anywhere I'm guessing this wasn't done on purpose.

Expected Behavior

The Lambda should return { "ok": true }.

Actual Behavior

The Lambda returns null.

Steps to Reproduce the Problem

  1. Create a function with the code above with version 126 of the layer.
  2. Send a test event to the Lambda.

Remarks

This was introduced in #661 with the check for the handler's number of arguments.

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