Exception mangling in hooks?

[John Arbash Meinel]

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...

> [Plugins are entirely capable of
> raising a nicely formated error themselves, as the pass-through of an
> expected error type in the calling loop shows].
> 
> -Rob

History has shown that plugins do tend to be sloppy about error
handling, and we have gotten a fair number of bug reports because of
things that plugins do. (I don't have a count, but as an example just
bzr-loom's handling of 'status' caused 3-4 repeat bugs to be raised in
bzr core, even though the last line clearly showed it was occurring in
bzr-loom.)

John
=:->
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