Re: [Boost-users] program_options: wild write

From: Christian Henning (chhenning_at_[hidden])
Date: 2005-11-23 10:14:20

Works fine on me. I'm using VC7.1 and boost 1.33.1 (beta). The output is:

Test:
  --test arg         import the specified OBJ file and save it to MDLM
                        format

Running the program in Purify I get one UMR ( Uninitialized Memory
Read ) warning. May it be that you are using some compiler settings
that make the program crash when there is such problem with reading
uninitialized memory? In any event Vladimir should be able to figure
out the problem.

Here is what Purify spits out:

[W] UMR: Uninitialized memory read in
?distance_at_Vconst_iterator@?$basic_string_at_DU?$char_traits_at_D@std@@V?$allocator_at_D@2@@std@@@std@@YAHVconst_iterator@?$basic_string_at_DU?$char_traits_at_D@std@@V?$allocator_at_D@2@@0_at_0@Z
{1 occurrence}
        Reading 1 byte from 0x0013ec23 (1 byte at 0x0013ec23 uninitialized)
        Address 0x0013ec23 points into a thread's stack
        Address 0x0013ec23 is 225 bytes past the start of local
variable 'Off' in
?distance_at_Vconst_iterator@?$basic_string_at_DU?$char_traits_at_D@std@@V?$allocator_at_D@2@@std@@@std@@YAHVconst_iterator@?$basic_string_at_DU?$char_traits_at_D@std@@V?$allocator_at_D@2@@0_at_0@Z
        Thread ID: 0x298
        Error location
            ?distance_at_Vconst_iterator@?$basic_string_at_DU?$char_traits_at_D@std@@V?$allocator_at_D@2@@std@@@std@@YAHVconst_iterator@?$basic_string_at_DU?$char_traits_at_D@std@@V?$allocator_at_D@2@@0_at_0@Z
[c:\program files\microsoft visual studio .net
2003\vc7\include\xutility.:489]
            boost::program_options::?A0xeaa31ea9::format_paragraph(basic_ostream<char,char_traits<char>::std>::std&,basic_string<char,char_traits<char>::std,allocator<char>::std>::std,UINT,UINT)
[c:\boost\libs\program_options\src\options_description.cpp:387]
                                        {
                                            // is last_space within
the second half ot the
                                            // current line
             =>                             if
(unsigned(distance(last_space, line_end)) <
                                                (line_length - indent) / 2)
                                            {
                                                line_end = last_space;
            boost::program_options::?A0xeaa31ea9::format_description(basic_ostream<char,char_traits<char>::std>::std&,basic_string<char,char_traits<char>::std,allocator<char>::std>::std
const&,UINT,UINT)
[c:\boost\libs\program_options\src\options_description.cpp:453]
            boost::program_options::?A0xeaa31ea9::format_one(basic_ostream<char,char_traits<char>::std>::std&,option_description::program_options::boost
const&,UINT,UINT)
[c:\boost\libs\program_options\src\options_description.cpp:489]
            boost::program_options::options_description::print(basic_ostream<char,char_traits<char>::std>::std&)const
[c:\boost\libs\program_options\src\options_description.cpp:522]
            boost::program_options::<<(basic_ostream<char,char_traits<char>::std>::std&,options_description::program_options::boost
const&) [c:\boost\libs\program_options\src\options_description.cpp:288]
            main           [c:\cybermdx\test
programs\iostreams\iostreams.cpp:22]
            mainCRTStartup [f:\vs70builds\3077\vc\crtbld\crt\src\crtexe.c:398]

Regards,
Christian