[Bug c++/68510] New: [concepts] ICE: in gimplify_var_or_parm_decl, at gimplify.c:1827

[lucdanton at free dot fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68510

            Bug ID: 68510
           Summary: [concepts] ICE: in gimplify_var_or_parm_decl, at
                    gimplify.c:1827
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: lucdanton at free dot fr
  Target Milestone: ---

Created attachment 36817
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36817&action=edit
Reduced testcase

Using g++-trunk (GCC) 6.0.0 20151124 (experimental). The testcase was
mechanically reduced. An older snapshot used to be able to compile the original
unreduced program, according to the reflog:

commit c66cf0b787e892170f4981e8473aab601610a630
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@229691
138bc75d-0d04-0410-961f-82ee72b054a4