Ananda Tallur wrote:
Hello,
Originally, I had discovered a problem when using boost::unit_test_framework, for which I have already posted. But, by further analysing the problem, I could come out to a simple program, using only boost shared pointers, and which fails : -> on Mac OS X 10.4 -> when compiled with gcc 4.0.1 (coming with XCode 2.2.1), or gcc 4.1 (delivered by darwin ports) -> with optimisations : at least -O, or -O1, or -O2,etc... It works correctly with -O0 -> using either boost 1.33.1, 1.33.0, or 1.32.0
Below is the sample test program :
--- macosx_gcc4problem.cpp ---
[...] This issue has already been reported, along with a fix, by Howard Hinnant: http://lists.boost.org/Archives/boost/2006/03/102088.php http://lists.boost.org/Archives/boost/2006/03/102122.php http://lists.boost.org/Archives/boost/2006/03/102134.php and the upcoming 1.34 release will no longer suffer from it. Thank you very much for taking the time to simplify the failing example. I've reformatted it a bit as a test case. If you verify that it still fails for you, I'll include it in the regression tests. #include <boost/shared_ptr.hpp> #include <boost/detail/lightweight_test.hpp> struct A { int value; }; struct B { B( boost::shared_ptr<A> val ): a( val ) {} boost::shared_ptr<A> a; }; struct C { C( B val ): b( val ) {} B b; }; struct D { D( C val ): c( val ) {} C c; }; D create() { boost::shared_ptr <A> a( new A ); a->value = 12345; return D( C( B( a ) ) ); } int main() { D d = create(); BOOST_TEST( d.c.b.a->value == 12345 ); return boost::report_errors(); }