http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45699
--- Comment #8 from bredelin at ucla dot edu 2010-10-08 15:58:49 UTC --- When you say segfault, I presume you mean abort? When I use the debugger, the problem appears to be in the call to new Parameters(*P); On x86_64, the problem occurs as follows: (x86_32 is different) In the copy constructor, Parameters::SuperModel2 is constructed OK. Then the copy constructor for Parameters::Probability_Model is called, which calls the copy constructor for Probability_Model::Model2, which calls the copy constructor for Model2::vector<double>. In the (synthesized) copy constructor vector<double>::vector<double>(const vector<double>& __x), the debugger claims that "this" and "__x" are both optimized out, and won't let me inspect anything. The SIGABORT actually occurs because the __x has a __x.size() of 18446726482060379005. It should have a size of 0. (I can't call __x.size(), but I can access __n, which is initialized from __x.size()).
