[Bug c++/20789] [3.4/4.0/4.1 regression] ICE with incomplete type in template

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |minor
   Target Milestone|3.4.4                       |4.0.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20789