is this GNAT error message confusing or am I confused or both?

[Robert Dewar]

Richard Kenner wrote:
>     > This is an example message printed by GNAT:
>     > 
>     > zx.adb:10:07: invalid prefix in selected component "X"
> 
> I know what the terms mean, but my problem with this wording is that
> it makes it sound like "X" is the selected component and it somehow
> has an invalid prefix.
> 
> I'd reword it as
> 	selected component has invalid prefix "X"
> 
> or
> 	"X" is an invalid prefix of a selected component

that sounds like a reasonable suggestion. It's not a trivial
change (because of ACATS base line changes, and changes to
reference outputs in our test suite), but it indeed may
make things clearer