Re: [Qemu-devel] [PATCH 00/10]: QError v4

[Markus Armbruster]

Luiz Capitulino <address@hidden> writes:

> On Sat, 21 Nov 2009 11:02:41 +0100
> Markus Armbruster <address@hidden> wrote:
>
>> Now, what should a client do when it discovers the monitor command it
>> needs to use has grown a new error?  Refuse to use the command for fear
>> of having to present a sub-par error message to the user in case it
>> fails?
>
>  What's your solution for this problem?
>
>> Yes, the client needs updating in such a scenario.  But since it's a
>> normal, expected situation, I wouldn't call it a client bug.  And
>> regardless how we call it, we better handle it gracefully.
>
>  The best thing the client can do here is to print the error class.

In my opinion, the best such a client can do to report such an error to
a human user is to show the (localized) error class (assuming it knows
*that*, which is not a given), plus the (not localized) human-readable
message the server sent along with the unknown error code.  I'd expect
the latter part to be more useful in practice than the former.