I think I just resolved the issue, but I'm not entirely sure I understood what went wrong. I neglected to mention that I had installed gcc 4.6.0 prior to installing Boost. I installed gcc like so: ./configure --prefix=/usr/local --program-suffix=-4.6 make make install When I uninstalled gcc, like so sort -r gcc_files |while read f; do sudo rm $f 2>/dev/null || sudo rmdir $f 2>/dev/null; done and then rebuilt and reinstalled Boost, the program I enlisted in my previous post ran without a crash. Perhaps g++-4.6 files got in the way in using g++-4.0 ? I'd really like to have g++-4.6 to enjoy the latest taste of C++0x it features! Sorry if I'm jumping off-topic here, but I'm not sure where I should otherwise ask about getting g++-4.6 working with Boost v1.46.1. Matan On Sat, May 21, 2011 at 1:48 PM, Matan Nassau <matan.nassau@gmail.com>wrote:

Hi!

When I run the following program,

#include <boost/program_options.hpp>

int main() { boost::program_options::positional_options_description positional; return 0; }

the program aborts with the error

sandbox(1791) malloc: *** error for object 0x7fff70506500: pointer being freed was not allocated *** set a breakpoint in malloc_error_break to debug

My platform is Mac OS X 10.6.7. I installed Boost 1.46.1 on my own, like so:

./bootstrap --prefix=/usr/local ./bjam memory-model=64 ./bjam install

The toolset bjam chose was darwin, which uses gcc-4.0 if I understood the build correctly. I also tried rebuilding boost with

./bjam memory-model=64 toolset=darwin-4.2

but the issue persisted.

Any idea what causes this crash?

Matan