[Bug c++/86135] At run time, when the constructor tries to construct an objects element with a initializer-list (using c++11 style) is giving segmentation fault. The old style of initialize with parenthesis is working properly.

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86135

--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
You didn't provide a proper testcase so nobody can possibly explain why your
code crashes.

If it's similar to the code in comment 3 then model_t<std::vector<object_t>>
tries to construct a vector<object_t> from a vector<object_t> using list-init
which chooses the initializer_list constructor because object_t can be
constructed from vector<object_t>. It's the same bug 85577.