Hi Braden,

When the attached test program is run as

$ program-options-test --foo

program_options in Boost 1.33.1 thinks the option is ambiguous; apparently because there is another option that starts with "foo" followed by a dash.

This is a regression with respect to 1.32.0.

Thanks for the report! This was independently reported by Tilman Sohr, and just fixed (and testase updated to catch this issue). Thanks, Volodya