Incorrect breakpoint diagnostics in MI

[Konstantin Karganov <kostik@ispras.ru>]

Hello.

Playing with MI breakpoint commands I found the following thing:
Only "-break-after" and "-break-condition" correctly report the error if 
the breakpoint doesn't exist. While other commands report "^done".

(gdb)
-break-after 123 123
&"No breakpoint number 123.\n"
^error,msg="No breakpoint number 123."
(gdb)
-break-enable 123
~"No breakpoint number 123.\n"
^done
(gdb)
-break-disable 123
~"No breakpoint number 123.\n"
^done
(gdb)
-break-delete 123
~"No breakpoint number 123.\n"
^done

The diagnostics goes to console output, that is possibly not visible to FE 
user and the result itself is "ok".

Is it a bug?

Best reagards,
Konstantin.