http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53596
--- Comment #7 from Manuel López-Ibáñez <manu at gcc dot gnu.org> 2012-06-07 08:53:43 UTC --- I summarized all this in http://gcc.gnu.org/wiki/VerboseDiagnostics#delete-non-virtual-dtor but I am afraid it is not a very good summary, please feel free to improve it.