Searching for 18249 or PR18249 in the web archive of the gcc-patches mailing list fails, even though there are postings with PR18249 in the subject.
Who is in charge of GCC infrastructure (wiki, mailing lists, bugzilla)? I am afraid there is no one, so this is not going to be fixed soon. Meanwhile use Google.
Searching for 18249 in the web archive of the gcc-patches mailing list with mnoGoSearch 3.3.13 does return the link to PR 18249. http://gcc.gnu.org/ml/gcc-patches/2010-05/msg01458.html