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From: "jarrydb at cse dot unsw.edu.au" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/51299] New: [C++11] erroneous nullptr warning on dynamic cast Date: Fri, 25 Nov 2011 03:01:00 -0000 [thread overview] Message-ID: <bug-51299-4@http.gcc.gnu.org/bugzilla/> (raw) http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51299 Bug #: 51299 Summary: [C++11] erroneous nullptr warning on dynamic cast 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 The below code compiled with -Wzero-as-null-pointer-constant produces an erroneous warning on a dynamic cast. g++ -std=gnu++11 nullcast.cpp -c -Wzero-as-null-pointer-constant nullcast.cpp: In function ‘void foo(Base*)’: nullcast.cpp:13:40: warning: zero as null pointer constant [-Wzero-as-null-pointer-constant] nullcast.cpp:13:40: warning: zero as null pointer constant [-Wzero-as-null-pointer-constant] class Base { public: virtual ~Base() = default; }; class Derived : public Base { }; void foo(Base *b) { Derived *d = dynamic_cast<Derived*>(b); } 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++ Thread model: posix gcc version 4.7.0 20111125 (experimental) (GCC)
next reply other threads:[~2011-11-25 1:19 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-11-25 3:01 jarrydb at cse dot unsw.edu.au [this message] 2011-11-25 8:31 ` [Bug c++/51299] " paolo.carlini at oracle dot com 2011-11-30 18:43 ` paolo at gcc dot gnu.org 2011-11-30 18:43 ` paolo.carlini at oracle dot com
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