Wrong number of entries in std::vector<boost::tuple<double, double, double> >

[Ruediger Berlich <r.berlich@…>]

I have a class with a std::vector<boost::tuple<double, double, double> >, that is supposed to always have at least one entry, but may have more. Hence, in the default constructor, I initialize the std::vector with one entry. The class is also serializable. Up until Boost 1.57, a de-serialized object always had the correct number of entries in the vector. As of 1.58, I am getting one entry too much, which probably means that Boost.Serialization simply attaches entries to the vector of a default-constructed class, but doesn’t clear it first. This happens in C++11-Mode, both on Ubuntu 14.10 (gcc 4.9.1) as well as on MacOS X Yosemite . It DOES NOT happen with a std::vector<double> . Attached to this ticket is a full test case that replicates the problem in a simplified environment.

For Boost 1.57 the program returns:

t_vec.size() = 1
t_vec2.size() = 1

For Boost 1.58 the answer is

t_vec.size() = 1
t_vec2.size() = 2

Best Regards,
Beet