[Bug c++/51045] New: [C++0x] erroneous zero as null pointer constant warning at delete

[jarrydb at cse dot unsw.edu.au]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51045

             Bug #: 51045
           Summary: [C++0x] erroneous zero as null pointer constant
                    warning at delete
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: jarrydb@cse.unsw.edu.au
              Host: x86_64-unknown-linux-gnu
            Target: x86_64-unknown-linux-gnu
             Build: x86_64-unknown-linux-gnu


The attached code erroneously gives me a warning about using zero as a null
pointer constant where there is no zero at all. The line it points to is a
delete statement.

g++ -std=gnu++11 zeronull.cpp -c -Wzero-as-null-pointer-constant
zeronull.cpp: In instantiation of ‘A<T>::~A() [with T = Op]’:
zeronull.cpp:12:7:   required from here
zeronull.cpp:7:5: warning: zero as null pointer constant
[-Wzero-as-null-pointer-constant]


gcc -v

Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/home/jarrydb/current/soft/install-latest/libexec/gcc/x86_64-unknown-linux-gnu/4.7.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /home/jarrydb/current/soft/src/gcc-git/configure
--prefix=/home/jarrydb/current/soft/install-latest --disable-multilib
--enable-languages=c,c++ : (reconfigured)
/home/jarrydb/current/soft/src/gcc-git/configure
--prefix=/home/jarrydb/current/soft/install-latest --disable-multilib
--enable-languages=c,c++
Thread model: posix
gcc version 4.7.0 20111108 (experimental) (GCC)