On Sun, Aug 26, 2012 at 20:26 -0700, Bernhard Amann wrote: > + if ( *s.rbegin() == set_separator[0] ) Could s be empty here? Robin -- Robin Sommer * Phone +1 (510) 722-6541 * robin at icir.org ICSI/LBNL * Fax +1 (510) 666-2956 * www.icir.org