------- Comment #4 from redi at gcc dot gnu dot org 2010-06-18 13:25 ------- If class_template<int>::class_template is instantiated in another translation unit then it needs to refer to the same 's' ... but since the constructor calls a static function, an instantiation in another TU would violate the ODR, which would be undefined (no diagnostic required) so by that argument the compiler could assume no other instantiations and therefore no valid way for another TU to refer to 's'
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44577
