[Bug c/47102] error message "duplicate member" in error ?

[jsm28 at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47102

--- Comment #1 from Joseph S. Myers <jsm28 at gcc dot gnu.org> 2010-12-29 11:43:20 UTC ---
The diagnostic is correct; the code is invalid; C1X requires this to be
diagnosed; it is ambiguous whether "page" refers to an element directly in the
struct or one accessed via the anonymous union therein.  See bug 4784.