[Bug libstdc++/78235] New: [7 Regression] libstdc++ testsuite run.cc ICE in int_bit_position

[dje at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78235

            Bug ID: 78235
           Summary: [7 Regression] libstdc++ testsuite run.cc ICE in
                    int_bit_position
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dje at gcc dot gnu.org
  Target Milestone: ---
            Target: powerpc-ibm-aix*

Created attachment 39981
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39981&action=edit
preprocessed source from 20_util/variant/run.cc

In file included from
/nasfarm/edelsohn/src/src/libstdc++-v3/testsuite/20_util/variant/run.cc:21:
/tmp/GCC/powerpc-ibm-aix7.2.0.0/libstdc++-v3/include/variant: In instantiation
of 'class std::variant<std::monostate, std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> > >':
/nasfarm/edelsohn/src/src/libstdc++-v3/testsuite/20_util/variant/run.cc:54:  
required from here
/tmp/GCC/powerpc-ibm-aix7.2.0.0/libstdc++-v3/include/variant:956: internal
compiler error: tree check: expected field_decl, have template_decl in
int_bit_position, at tree.h:5396