Hello, g++-current ( [trunk revision 143790] ) produce incorrect
warning. Need I file bug-report?
# g++ -Wall -O2 -c test3.cpp
test3.cpp: In function 'void bar()':
test3.cpp:16: warning: dereferencing pointer '<anonymous>' does break
strict-aliasing rules
/usr/local/gcc_current/lib/gcc/i686-pc-linux-gnu/4.4.0/include/c++/bits/stl_list.h:139:
note: initialized from here
# pr -n test3.cpp
1 #include <string>
2 #include <list>
3
4 class A;
5
6 class B {
7 public:
8 void foo(A&);
9 std::string s;
10 };
11
12 class A {
13 public:
14 A& qaz() {
15 l.push_back( new A() );
16 return *l.back();
17 }
18 std::list<A*> l;
19 };
20
21 void bar()
22 {
23 A a;
24 B b;
25 b.foo(a.qaz());
26 }
[r...@localhost gcc_err]# g++ -v
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../gcc_current/configure
--prefix=/usr/local/gcc_current --enable-shared --enable-threads=posix
--enable-checking=release --enable-__cxa_atexit
--enable-version-specific-runtime-libs --enable-languages=c,c++ :
(reconfigured) ../gcc_current/configure
--prefix=/usr/local/gcc_current --enable-shared --enable-threads=posix
--enable-checking=release --enable-__cxa_atexit
--enable-version-specific-runtime-libs --enable-languages=c,c++
--no-create --no-recursion : (reconfigured) ../gcc_current/configure
--prefix=/usr/local/gcc_current --enable-shared --enable-threads=posix
--enable-checking=release --enable-__cxa_atexit
--enable-version-specific-runtime-libs --enable-languages=c,c++
--no-create --no-recursion : (reconfigured) ../gcc_current/configure
--prefix=/usr/local/gcc_current --enable-shared --enable-threads=posix
--enable-checking=release --enable-__cxa_atexit
--enable-version-specific-runtime-libs --enable-languages=c,c++
--no-create --no-recursion : (reconfigured) ../gcc_current/configure
--prefix=/usr/local/gcc_current --enable-shared --enable-threads=posix
--enable-checking=release --enable-__cxa_atexit
--enable-version-specific-runtime-libs --enable-languages=c,c++
--no-create --no-recursion : (reconfigured) ../gcc_current/configure
--prefix=/usr/local/gcc_current --enable-shared --enable-threads=posix
--enable-checking=release --enable-__cxa_atexit
--enable-version-specific-runtime-libs --enable-languages=c,c++
--no-create --no-recursion : (reconfigured) ../gcc_current/configure
--prefix=/usr/local/gcc_current --enable-shared --enable-threads=posix
--enable-checking=release --enable-__cxa_atexit
--enable-version-specific-runtime-libs --enable-languages=c,c++
--no-create --no-recursion : (reconfigured) ../gcc_current/configure
--prefix=/usr/local/gcc_current --enable-shared --enable-threads=posix
--enable-checking=release --enable-__cxa_atexit
--enable-version-specific-runtime-libs --enable-languages=c,c++
--no-create --no-recursion : (reconfigured) ../gcc_current/configure
--prefix=/usr/local/gcc_current --enable-shared --enable-threads=posix
--enable-checking=release --enable-__cxa_atexit
--enable-version-specific-runtime-libs --enable-languages=c,c++
--no-create --no-recursion : (reconfigured) ../gcc_current/configure
--prefix=/usr/local/gcc_current --enable-shared --enable-threads=posix
--enable-checking=release --enable-__cxa_atexit
--enable-version-specific-runtime-libs --enable-languages=c,c++
--no-create --no-recursion : (reconfigured) ../gcc_current/configure
--prefix=/usr/local/gcc_current --enable-shared --enable-threads=posix
--enable-checking=release --enable-__cxa_atexit
--enable-version-specific-runtime-libs --enable-languages=c,c++
--no-create --no-recursion : (reconfigured) ../gcc_current/configure
--prefix=/usr/local/gcc_current --enable-shared --enable-threads=posix
--enable-checking=release --enable-__cxa_atexit
--enable-version-specific-runtime-libs --enable-languages=c,c++
--no-create --no-recursion : (reconfigured) ../gcc_current/configure
--prefix=/usr/local/gcc_current --enable-shared --enable-threads=posix
--enable-checking=release --enable-__cxa_atexit
--enable-version-specific-runtime-libs --enable-languages=c,c++
--no-create --no-recursion : (reconfigured) ../gcc_current/configure
--prefix=/usr/local/gcc_current --enable-shared --enable-threads=posix
--enable-checking=release --enable-__cxa_atexit
--enable-version-specific-runtime-libs --enable-languages=c,c++
--no-create --no-recursion : (reconfigured) ../gcc_current/configure
--prefix=/usr/local/gcc_current --enable-shared --enable-threads=posix
--enable-checking=release --enable-__cxa_atexit
--enable-version-specific-runtime-libs --enable-languages=c,c++
--no-create --no-recursion : (reconfigured) ../gcc_current/configure
--prefix=/usr/local/gcc_current --enable-shared --enable-threads=posix
--enable-checking=release --enable-__cxa_atexit
--enable-version-specific-runtime-libs --enable-languages=c,c++
--no-create --no-recursion : (reconfigured) ../gcc_current/configure
--prefix=/usr/local/gcc_current --enable-shared --enable-threads=posix
--enable-checking=release --enable-__cxa_atexit
--enable-version-specific-runtime-libs --enable-languages=c,c++
--no-create --no-recursion
Thread model: posix
gcc version 4.4.0 20090130 (experimental) [trunk revision 143790] (GCC)
# uname -a
Linux localhost.localdomain 2.6.26.8-57.fc8 #1 SMP Thu Dec 18 19:19:45
EST 2008 i686 i686 i386 GNU/Linux
