[Bug c++/66996] New: [6 Regression] defined but not used [-Wunused-function]

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66996

            Bug ID: 66996
           Summary: [6 Regression] defined but not used
                    [-Wunused-function]
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
  Target Milestone: ---

[hjl@gnu-6 bin]$ cat x.cc 
namespace
{

class Foo
{
public:
  ~Foo ();
};

Foo::~Foo ()
{
}
}
[hjl@gnu-6 bin]$ ./g++ -S -Wall x.cc -O2 
x.cc:10:1: warning: ‘{anonymous}::Foo::~Foo()’ defined but not used
[-Wunused-function]
 Foo::~Foo ()
 ^
[hjl@gnu-6 bin]$