[Boost-users] BOOST_THROW_EXCEPTION causing Abort Trap

Subject: [Boost-users] BOOST_THROW_EXCEPTION causing Abort Trap
From: Kieran Simpson (kierans777_at_[hidden])
Date: 2011-11-24 18:37:33

I'm trying to use `boost::exception` and have condensed my prototype 
code down to the example in the Boost exception tutorial 
(http://www.boost.org/doc/libs/1_47_0/libs/exception/doc/tutorial_transporting_data.html) 
however when running the code with the `BOOST_THROW_EXCEPTION` macro I 
get an abort from the program.

#include <iostream>
#include <boost/exception/all.hpp>

typedef boost::error_info<struct tag_my_info,int> my_info;
struct my_error: virtual boost::exception, virtual std::exception { };

void f()  {
   BOOST_THROW_EXCEPTION(my_error() << my_info(42));

   // Uncomment the below (and comment the above) for the program to work
   //throw my_error() << my_info(42);
}

int main(int argc, char** argv)  {
   try  {
     f();
   }
   catch(my_error& x)  {
     if(int const* mi = boost::get_error_info<my_info>(x))  {
       std::cout << "My info: " << *mi << std::endl;
     }
   }

   return 0;
}

Running the code with the BOOST_THROW_EXCEPTION macro:

$ ./a.out
Abort trap

If as the comment says, I swap the code, all is well

$ ./a.out
My info: 42

Below is the output from the g++ preprocessor for f()

void f() {
   ::boost::exception_detail::throw_exception_(my_error() << 
my_info(42),__PRETTY_FUNCTION__,"main.cpp",14);
}

Software versions are:

$ g++ -v
Using built-in specs.
Target: x86_64-apple-darwin10
Thread model: posix
gcc version 4.4.6 (GCC)

$ port list boost
boost                          @1.47.0         devel/boost

I'm on OSX SL using the tools provided by MacPorts.  I've double checked 
the g++ search paths and there's only one copy of the boost hpp files 
and that's the ones that belong to the aforementioned boost package.

I have no idea why the abort trap is being called.  I admit I'm newish 
to C++.

I've also asked this question on StackOverflow 
(http://stackoverflow.com/questions/8256874/boost-throw-exception-causing-abort-trap)

Cheers,