On 27 August 2012 00:30, Sam Varshavchik wrote: > > "g++47 (FreeBSD Ports Collection) 4.7.0 20111203 (experimental)" invokes the > destructor of two instances of this class twice. Sample output (highlighting > what I've now wasted a week on): Looks like a bug in that version, which looks to be built from a pretty old snapshot i.e. unreleased and unfinished version. Can't you use a newer version?