fixes https://linear.app/tryghost/issue/SLO-126
fixes https://linear.app/tryghost/issue/SLO-141
fixes https://linear.app/tryghost/issue/SLO-150
- during a session, posthog-js' rrweb extension can start throwing a lot
of errors. These errors do not affect the application
- similarly, ember-concurrency's task cancellation errors do not affect
the application. Task in ember-concurrency are expected to be canceled.
However, if they're cast to a Promise, they show up as unhandled Promise
rejections as Promises do not have a concept of cancellation
refs TryGhost/Product#4175
- Added error handling to Sentry's beforeSend function in both Admin and
Core, so if there is any error in beforeSend, we will still send the
unmodified event to Sentry
- This is in response to an incident yesterday wherein the beforeSend
function threw an error due to an unexpected missing value in the
exception. The event sent to Sentry was the error in the beforeSend
function, and the original error never reached Sentry.
- If the original event had reached Sentry, even if unmodified by the
logic in beforeSend, we could have been alerted to the issue sooner and
more easily identified all affected sites.
- Also added defensive logic to protect for certain values in the
exception passed to beforeSend not existing and added unit tests for the
beforeSend function in admin and core
