id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
11935	boost::program_options::error_with_option_name.what() throws std::out_of_range when an empty option is used in the command input	mark.incley@…	Vladimir Prus	"Hi,

After accidentally typing ""-v . -"" (without the quotes) into a Windows command line app written with boost::po, it crashed. The app's catch block (code below) calls boost::po::error_with_option_name.what() and this subsequently throws std::out_of_range().

It appears as though the empty option ""-"" confuses boost::program_options::strip_prefixes(const std::string& text) which is called with text value of ""-"", resulting in text.substr being called with a value of npos:

{{{
  inline std::string strip_prefixes(const std::string& text)
    {
        // ""--foo-bar"" -> ""foo-bar""[[BR]]
        return text.substr(text.find_first_not_of(""-/""));
    }
}}}

Here's my code.

	
{{{
po::variables_map vm;
	po::options_description desc(""Options"");
	desc.add_options()
		(""folder,f"",	po::wvalue<wstring>()->required(), ""Specify the name of the folder containing the C++ projects to check"")
		(""list,l"",		""List the project file names as they're checked"")
		(""verbose,v"",	""Verbose; Show the node values when finding non-SAK SCC values"")
		(""help,?"",		""Show usage information"")
		;

	po::positional_options_description pod;
	pod.add(""folder"", -1);

	try
	{
		po::store(po::wcommand_line_parser(argc, argv).options(desc).positional(pod).run(), vm);
		po::notify(vm);
	}
	catch (const boost::program_options::error & e)
	{
		cerr << w32::fg_red << e.what() << w32::restore << endl;
		return ERROR_UNHANDLED_EXCEPTION;
	}

}}}


I am using Boost 1.60 on Windows 7 (64-bit) with Visual Studio 2015 Update 1.

Cheers[[BR]]
Mark."	Bugs	new	To Be Determined	program_options	Boost 1.60.0	Problem		program_options