-Wvarargs does not warn for member functions

[Prathamesh Kulkarni]

Hi,
    It appears to me that, g++ does not warn for -Wvarargs for member functions.

For the following test-case:
#include <cstdarg>

struct f
{
  void foo(int x, int y, ...)
  {
    va_list ap;
    va_start (ap, x);
  }
};

I compiled it with g++ -Wvarargs, and it only printed the warning:
wa.cpp:4:6: warning: unused parameter ‘y’ [-Wunused-parameter]
 void foo(int x, int y, ...)

Test-case for non-member function:
#include <cstdarg>

void foo(int x, int y, ...)
{
  va_list ap;
  va_start (ap, x);
}

Compiling with g++ -Wvarargs additionally prints:
foo.cpp: In function ‘void foo(int, int, ...)’:
foo.cpp:6:19: warning: second parameter of ‘va_start’ not last
named argument [-Wvarargs]
   va_start (ap, x);

g++ -v:
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.8/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
4.8.2-19ubuntu1'
--with-bugurl=file:///usr/share/doc/gcc-4.8/README.Bugs
--enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.8 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.8
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--enable-gnu-unique-object --disable-libmudflap --enable-plugin
--with-system-zlib --disable-browser-plugin --enable-java-awt=gtk
--enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64/jre
--enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.8-amd64
--with-arch-directory=amd64
--with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --with-tune=generic
--enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1)

Thanks and Regards,
Prathamesh