id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
5148	tellg requires seekable, even though it's not a seek operation	anonymous	Jonathan Turkanis	"Problem explained here: hxxp://groups.google.com/group/boost-list/browse_thread/thread/941d71547c4cc065?fwc=2&pli=1 . Example code demonstrating unexpected behavior included for brevity, in my case compiled on MSVC 2008 boost 1.44:
#include <ostream> 
#include ""boost/iostreams/categories.hpp"" 
#include ""boost/iostreams/filtering_stream.hpp"" 
#include ""boost/iostreams/filter/zlib.hpp"" 
int main() 
{ 
        boost::iostreams::filtering_stream< boost::iostreams::input > strm( ( boost::iostreams::zlib_decompressor() ) ); 
        char sourceArr[512]; 
        strm.push( boost::iostreams::array_source( sourceArr, sourceArr + sizeof( sourceArr ) ) ); 
        strm.tellg(); // Throws even though we're not seeking, just reading the read head position
} "	Bugs	closed	To Be Determined	iostreams	Boost 1.44.0	Problem	invalid