[Bug c++/62085] SFINAE where specialization parameter class member returns an abstract type fails

[jameslyon0 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62085

--- Comment #1 from James Lyon <jameslyon0 at gmail dot com> ---
Created attachment 33287
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33287&action=edit
Test case

Seems I messed up attaching the test the first time :)