id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
627,program_options: format_paragraph assert fails on long line,kbluck,Vladimir Prus,"{{{
Boost 1.33.1, MSVC 8.0

When format_paragraph() in options_description.cpp
attempts to format a line that will wrap because it is
> 80 chars, it causes an assert failure in the standard
library string iterator's operator+=(). The offending
po:: code line is options_description.cpp Line 361:

if (line_begin + (line_length - indent) > par_end)
...

Relevant call stack attached.

My guess is that the assert is complaining that the +
operation has produced an iterator past the string's
end(); this code seems to be assuming that the iterator
object is a pointer. I believe it is officially
undefined to advance an iterator past end().

One way of getting around this might be to use
std::distance instead of comparing the iterators directly.
}}}",Bugs,closed,,None,None,Showstopper,fixed,,