[Bug c++/65973] [5/6 Regression] segmentation fault when compiling C++14 code

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65973

--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
When fixing this, remember to also add the testcase in PR65985.