http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53624
--- Comment #2 from Daniel Lunow <lunow at math dot hu-berlin.de> 2012-06-10 04:49:29 UTC --- Their is no requirement (in the c++11 standard) for function templates that implies subsequent template parameters after a template parameter with default template argument must also have default template arguments (in contrast to class templates). In general this works in gcc. But with the local types inside the template function gcc might reject it because it creates local types as templated with the same template parameters/default arguments and checks the requirement for class templates. The line number/offset in the error message clearly refers to the local struct.
