Do not fail if an Exception has no backtrace

[zinovyev]

Currently backtrace of an exception is checked by the empty? method. But it sometimes occur that the Exception class will return nil for backtrace:

StandardError.new.backtrace.empty?
NoMethodError: undefined method `empty?' for nil:NilClass

[JonRowe]

:wave: we would need a test indicating how this can occur

[zinovyev]

wave we would need a test indicating how this can occur

@JonRowe sure! I've added a test for this case.

[zinovyev]

Perfect, thank you. Would you like to add a Changelog entry?

@pirj Thank you! Should I add a Changelog entry manually? Sorry I'm not completely aware of the process. I just read that in development docs:

No changelog entry is necessary (we'll add it as part of the merge process!)

Do I only need to provide a change log message or am I also supposed to add it to the CHANGELOG.md file? I would call it something like: "Prevent ExceptionPresenter failure when handling an error with a nil backtrace"

[pirj]

No changelog entry is necessary (we'll add it as part of the merge process!)

Oh, sorry to bother. It slipped my mind. :+1:

[zinovyev]

Thank you guys for your reviews and for being so helpful! Do you think that we can merge it now? It looks like I don't have the permission to do it by myself. Or will it just be merged automatically in some time?

[pirj]

I'll handle this later in the day.

[pirj]

Thanks for your contribution!