[Bug c++/97996] New: [OMP] Missing 'omp_mappable_type' error diagnostic inside C++ template

[tschwinge at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97996

            Bug ID: 97996
           Summary: [OMP] Missing 'omp_mappable_type' error diagnostic
                    inside C++ template
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Keywords: openacc, openmp
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tschwinge at gcc dot gnu.org
                CC: jakub at gcc dot gnu.org
  Target Milestone: ---

Created attachment 49628
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49628&action=edit
'map-1_.C'

As discussed in <http://mid.mail-archive.com/20201125105244.GB3788@tucnak> (for
OpenMP, and now reproduced for OpenACC, too), see XFAILs in attached testcase:
missing "error: ‘a’ referenced in target region does not have a mappable type"
diagnostics inside C++ template.