[Bug libstdc++/92267] [9/10 Regression] crash with a cppunit test case (built by GCC 9) and cpptest (built with GCC 8)

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92267

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Oct 29 17:14:55 2019
New Revision: 277577

URL: https://gcc.gnu.org/viewcvs?rev=277577&root=gcc&view=rev
Log:
PR libstdc++/92267 fix ABI change in deque iterators

Defaulting the copy constructor on its first declaration made it change
from user-provided (and non-trivial) to implicitly-defined (and
trivial). This caused an ABI incompatibility between GCC 8 and GCC 9,
where functions taking a deque iterator disagree on the argument passing
convention.

        PR libstdc++/92267
        * include/bits/stl_deque.h (_Deque_iterator(const _Deque_iterator&)):
        Do not define as defaulted.
        * testsuite/23_containers/deque/types/92267.cc: New test.

Added:
    trunk/libstdc++-v3/testsuite/23_containers/deque/types/92267.cc
Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/include/bits/stl_deque.h