id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
3361	[Program Options] Bug: empty arguments treated as positional ones	k-r.ernst@…	Vladimir Prus	"Tested with boost::program_options in 1.39

When an program argument is empty, or contains only whitespace, it it treated as positional argument,  confusing program_options

How to reproduce:

1. Get example app which expects 1 positional argument

2. launch it with e.g. execlp(""testapp"", ""testapp"", """", ""real_positional_argument"", NULL);

Observed behavior:
Error: ""too many positional options""

Expected behavior:
Empty argument should be ignored

Additional note:
instead of empty string """", the same error happens with only whitespace like "" """	Bugs	closed	Boost 1.40.0	program_options	Boost 1.39.0	Problem	invalid	program options whitespace positional