[Bug c++/58932] New: [4.9 Regression][C++11] Deleted functions and SFINAE in partial template specializations

["lucdanton at free dot fr" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58932

            Bug ID: 58932
           Summary: [4.9 Regression][C++11] Deleted functions and SFINAE
                    in partial template specializations
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: lucdanton at free dot fr

Created attachment 31114
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31114&action=edit
Testcase

Using:

$ gcc-snapshot --version
gcc-snapshot (Debian 20131021-1) 4.9.0 20131021 (experimental) [trunk revision
203899]

with flags -std=c++11 -Wall. The testcase is modified from PR 37208
(http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37208). I'm fairly confident that
previous 4.9 snapshots used to accept that kind of code (i.e. compile,
undefined references notwithstanding), and I think 4.8 does -- no copy of 4.8.2
on hand though.