id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
5577	The warning stack is not maintained	Tsukasa Kusakabe <kusakabe@…>		" === Problem ===
When ""#include"" is executed for the following file, the warning stack is destroyed.
The cause forgets to write ""#pragma warning(pop)"" or is a misuse of ""#pragma warning(default: warning-number-list)"".

File list
 * boost/spirit/home/classic/core/composite/composite.hpp
 * boost/spirit/home/classic/core/composite/actions.hpp
 * boost/archive/xml_wiarchive.hpp
 * boost/program_options/parsers.hpp
 * boost/program_options/variables_map.hpp
 * boost/test/utils/nullstream.hpp
 * boost/test/utils/iterator/ifstream_line_iterator.hpp

 === Impact ===
When the VisualStudio user uses a specific header, a part of a necessary warning is not displayed.

 === Reproduction code ===
{{{
#!cpp

#include <boost/config.hpp>
#pragma warning(error: 4193)

//boost/spirit/home/classic/core/composite/composite.hpp
#pragma warning(pop) // => warning C4193
#include <boost/spirit/home/classic/core/composite/composite.hpp>
#pragma warning(pop) // !!! There is not warning. !!!

//boost/spirit/home/classic/core/composite/actions.hpp
#pragma warning(pop) // => warning C4193
#include <boost/spirit/home/classic/core/composite/actions.hpp>
#pragma warning(pop) // !!! There is not warning. !!!

//boost/archive/xml_wiarchive.hpp
#pragma warning(pop) // => warning C4193
#include <boost/archive/xml_wiarchive.hpp>
#pragma warning(pop) // !!! There is not warning. !!!
#pragma warning(pop) // !!! There is not warning. !!!

//boost/program_options/parsers.hpp
#pragma warning(pop) // => warning C4193
#include <boost/program_options/parsers.hpp>
#pragma warning(pop) // !!! There is not warning. !!!

//boost/program_options/variables_map.hpp
#pragma warning(pop) // => warning C4193
#include <boost/program_options/variables_map.hpp>
#pragma warning(pop) // !!! There is not warning. !!!

//boost/test/utils/nullstream.hpp
#pragma warning(pop) // => warning C4193
#include <boost/test/utils/nullstream.hpp>
#pragma warning(pop) // !!! There is not warning. !!!

//boost/test/utils/iterator/ifstream_line_iterator.hpp
#pragma warning(pop) // => warning C4193
#include <boost/test/utils/iterator/ifstream_line_iterator.hpp>
#pragma warning(pop) // !!! There is not warning. !!!


int main() {
  return 0;
}
}}}

 === Environment ===
 * OS: Windows 7 Professional SP1
 * Compiler:
{{{
Microsoft Visual Studio 2010
Version 10.0.30319.1 RTMRel
Microsoft .NET Framework
Version 4.0.30319 RTMRel
}}}
"	Bugs	closed	To Be Determined	None	Boost 1.46.1	Problem	invalid