push_back on a vector crashing

[laserlight]

Don't be ashamed -- the partition() and stable_partition() algorithms seem to be overlooked or not known by many programmers, so they spend their time fighting (and fixing) while() and for-loops to do the work of arranging the data.

For the job of removing the failures, I would prefer to use remove_if with the range based erase. partition is sensible when you really want to keep all the elements; stable_partition is sensible when you want to keep all the elements while maintaining the original relative order.