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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/50660] warning about pass NULL to non pointer argument happens twice for template function call
Date: Fri, 07 Oct 2011 18:21:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D50660

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic
             Status|WAITING                     |NEW
   Last reconfirmed|2011-10-07 00:00:00         |
          Component|other                       |c++
            Summary|gcc repeats warnings twice  |warning about pass NULL to
                   |                            |non pointer argument
                   |                            |happens twice for template
                   |                            |function call
      Known to fail|                            |4.5.0, 4.7.0

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-10-07 1=
8:20:51 UTC ---
Simplified testcase:
#include <cstddef>

template<typename T> int f(T&);
int main(void)
{
  return f<const int>(NULL);
}
--- CUT ---
t.cc: In function =E2=80=98int main()=E2=80=99:
t.cc:6:27: warning: passing NULL to non-pointer argument 1 of =E2=80=98int =
f(T&) [with
T =3D const int]=E2=80=99 [-Wconversion-null]
t.cc:6:27: warning: passing NULL to non-pointer argument 1 of =E2=80=98int =
f(T&) [with
T =3D const int]=E2=80=99 [-Wconversion-null]
It only happens with template functions too.

Confirmed.