[Bug c++/47199] New: [C++0x] ICE: expected class 'type', have 'declaration' (function_decl) in same_type_ignoring_top_level_qualifiers_p, at cp/typeck.c:1407 with -fno-elide-constructors

["zsojka at seznam dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47199

           Summary: [C++0x] ICE: expected class 'type', have 'declaration'
                    (function_decl) in
                    same_type_ignoring_top_level_qualifiers_p, at
                    cp/typeck.c:1407 with -fno-elide-constructors
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz


Created attachment 22917
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22917
reduced testcase

Compiler output:
$ gcc -std=c++0x -fno-elide-constructors pr47199.C  
pr47199.C:14:34:   in constexpr expansion of 'S<<anonymous> >::s [with int
<anonymous> = 0, S<<anonymous> > = S<0>]()'
pr47199.C:14:36:   in constexpr expansion of 'S<0>((*(const S<0>*)(&
S<0>(-0x00000000000000001))))'
pr47199.C:14:36: internal compiler error: tree check: expected class 'type',
have 'declaration' (function_decl) in
same_type_ignoring_top_level_qualifiers_p, at cp/typeck.c:1407
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

May be related to PR47041, small changes to the testcase result in ICE
described there.

Tested revisions:
r168535 - crash
r165699 - code is rejected

Testcase was reduced from
libstdc++-v3/testsuite/20_util/duration/comparison_operators/constexpr.cc, it
fails with the same ICE