Re: [Boost-users] [Phoenix] boost::phoenix::erase crashes the app in VS2008

Subject: Re: [Boost-users] [Phoenix] boost::phoenix::erase crashes the app in VS2008
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2012-06-16 20:43:44

AMDG

On 06/14/2012 11:17 AM, Paul Heil wrote:
> I have a Visual Studio 2008 C++03 application where I'm using
> boost::phoenix::erase (v1.49.0) on a std::list<int> container that does not
> contain the element I want to erase.
> 
> This example is demonstrates the issue:
> 
>     int main()
>     {
>         namespace bp = boost::phoenix;
>         namespace bpa = boost::phoenix::arg_names;
> 
>         std::list< int > a;
> 
>         // works as expected (does nothing)
>         a.erase( a.end(), a.end() );
> 
>         // fails a debug assertion "list erase iterator outside range"
>         // Microsoft Visual Studio 9.0\VC\include\list\list : 790
>         bp::erase( bp::ref( a ), a.end() )();
> 
>         return 0;
>     }
> 
> In release mode, this de-references an uninitialized pointer and the
> application crashes. Am I using boost::phoenix::erase correctly?
> 

Your phoenix code only passes one iter.
a.erase(a.end()) is illegal.

To get the equivent of your non-phoenix
code, you need
bp::erase(bp::ref( a ), a.end(), a.end());

In Christ,
Steven Watanabe