http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48746
--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> 2011-04-28 10:52:51 UTC --- The problem is that matmul calls size0, which depends on correct rank information in the dtype field. Should be easy enough to fix by adding a default initializer for the dtype field, if only anybody knew where to look... Paul?