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From: "ppluzhnikov at google dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/56641] New: [4.7/4.8 regression] Bogus warning: 'A' has a field 'A::e' whose type uses the anonymous namespace
Date: Sun, 17 Mar 2013 15:43:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D56641

             Bug #: 56641
           Summary: [4.7/4.8 regression] Bogus warning: 'A' has a field
                    'A::e' whose type uses the anonymous namespace
    Classification: Unclassified
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: ppluzhnikov@google.com


This one is recent regression of gcc-4_7 branch.
Confirmed with current trunk r196749.


namespace {
#1 "foo.cc"
enum E { };
}

struct A
{
    enum E e;
};


g++ -c foo.ii
foo.cc:4:8: warning: =E2=80=98A=E2=80=99 has a field =E2=80=98A::e=E2=80=99=
 whose type uses the anonymous
namespace [enabled by default]

Deleting the '#1 "foo.cc"' line makes the warning go away.