Re: [Boost-users] About log example in visual studio 2008

Subject: Re: [Boost-users] About log example in visual studio 2008
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2014-03-20 13:30:43

AMDG

On 03/19/2014 11:13 AM, Xiande Cao wrote:
> Here is where the program stops,
> In "formater_parser.cpp file
>         const std::size_t len = end - begin;
>         if (std::char_traits< char_type
>> ::length(constants::message_text_keyword()) == len &&
>             std::char_traits< char_type
>> ::compare(constants::message_text_keyword(), begin, len) == 0)
>         {
>             m_AttrName = log::aux::default_attribute_names::message();
>         }
>         else
>         {
>  ???-->           m_AttrName =
> attribute_name(log::aux::to_narrow(string_type(begin, end)));
>         }
>     }
> 

I can't reproduce this.  I've tried (with 1.55)
cd libs\log\example\basic_usage
b2 variant=debug,release link=static,shared threading=single,multi
msvc-9.0express msvc-11.0/architecture=x86/address-model=32,64

and everything seems to be okay.  (I changed the target
type from exe to unit-test so that it would run the example)

> Here is the call stack,
>> cvsie.exe!boost::log::v2s_mt_nt5::`anonymous
> namespace'::formatter_parser<char>::on_attribute_name(const char *
> begin=0x000000013f259a81, const char * end=0x000000013f259a8a)  Line 359 +
> <snip>
> The error shows:
> Unhandled exception at 0x000000013f146b63 in cvsie.exe: 0xC0000005: Access
> violation reading location 0x0000000000000070.
> 

Looks like a null pointer.  Can you figure out which variable
is null?  It obviously isn't either of the arguments.  What
about "this?"

In Christ,
Steven Watanabe