Bug#134262: g++-3.0: Use of dynamic_cast makes compiled program segfault
On 2002-02-16 23:01:21, Martin v. Loewis wrote:
> Daniel Sj�ölie <deepone@acc.umu.se> writes:
>
> > 0x400a9c59 in osgDB::ReaderWriter::ReadResult::getNode() (this=0xbffff2a0)
> > at /home/source/osg/cvs/include/osgDB/ReaderWriter:64
> > 64 osg::Node* getNode() { return dynamic_cast<osg::Node*>(_object.get()); }
> > (gdb) s
> >
> > Program received signal SIGSEGV, Segmentation fault.
>
> Can you give a precise specification of the source code you have
> compiled to generate this problem?
>
> Are you sure that you are not invoking undefined behaviour? More
> specifically, are you sure that 0x808f170 really represents an
> osg::Object* to an object that has been allocated but not yet deleted?
We have now verified that everything works using the same compiler in
RedHat 7.2.
andek@localhost:/home/andek>g++ -v
Reading specs from
/sw/gcc-3.0.3/lib/gcc-lib/i686-pc-linux-gnu/3.0.3/specs
Configured with: ../../../3.0.3/configure --prefix=/sw/gcc-3.0.3
--disable-shared --disable-libgcj
Thread model: single
gcc version 3.0.3
Works.
andersb@goofy:~$ g++-3.0 -v
Reading specs from /usr/lib/gcc-lib/i386-linux/3.0.3/specs
Configured with: ../src/configure -v
--enable-languages=c,c++,java,f77,proto,objc --prefix=/usr
--infodir=/share/info --mandir=/share/man --enable-shared --with-gnu-as
--with-gnu-ld --with-system-zlib --enable-long-long --enable-nls
--without-included-gettext --disable-checking --enable-threads=posix
--enable-java-gc=boehm --with-cpp-install-dir=bin --enable-objc-gc
i386-linux
Thread model: posix
gcc version 3.0.3
Does not work.
Some interesting google hits:
http://lug.boulder.co.us/pipermail/lug/Week-of-Mon-20010917/013971.html
http://gcc.gnu.org/ml/libstdc++/1999-q4/msg00290.html
http://mailarchivers.ncsa.uiuc.edu/cgi-bin/mailarchivers/search.pl?archivename=PERFORMER&threadmsg=2350
/Daniel
--
Now take a deep breath, smile and don't take life so seriously... :)
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