On 11/22/2010 06:14 PM, Ian Lance Taylor wrote: > Alberto Griggio <alberto.griggio@xxxxxxxxx> writes: > >> My OS is Debian GNU/Linux 5.0, compiler is >> g++-4.1 (GCC) 4.1.3 20080704 (prerelease) (Debian 4.1.2-25) >> platform x86-64 > >> head_ = new (mem) Link; > >> If I uncomment the "may_alias" attribute, everything works. > > There have been a few bugs in the handling of placement new with regard > to aliasing. See in particular http://gcc.gnu.org/PR29286 . As far as > I know these bugs are fixed in current releases but they are apparently > not fixed in the older release you are using. Ah. Albert, please ignore my posting. It looked like astraightforward aliasing violation. Andrew.
