[z3-five] Five.traversable masking errors in views

[Chris Withers]

Alec Mitchell wrote:
> It's probably a good idea to fix this by saving the original exception
> and raising it later if necessary.  Even better would be if we could
> discriminate between those attribute errors which are due to lookup
> failures, and those that are de to code bugs, and raise the latter
> immediately.  Any ideas?

Well, LookupError is explicitly caught.

Can whoever wrote that code explain the legitimate reasons for catching 
AttributeErrors and the like?

cheers,

Chris

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