[Bug c++/56583] New: ICE with constexpr ctor and nested structs and unions

[msharov at users dot sourceforge.net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56583

             Bug #: 56583
           Summary: ICE with constexpr ctor and nested structs and unions
    Classification: Unclassified
           Product: gcc
           Version: 4.7.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: msharov@users.sourceforge.net


Created attachment 29632
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29632
The code causing the failure

An ICE occurs in a constexpr constructor where a member is initialized that is
in an anonymous member union containing an anonymous struct. See attached file.
Compiling with g++ -std=c++11 -c tes.cc yields:

tes.cc: In function 'int main()':
tes.cc:23:21:   in constexpr expansion of 'r.CRect::CRect(1, 2, 3, 4)'
tes.cc:23:21: internal compiler error: in base_field_constructor_elt, at
cp/semantics.c:7033
Please submit a full bug report,
with preprocessed source if appropriate.