[Bug libstdc++/80893] std::vector creation dereferences null pointer

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80893

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed May 31 12:41:45 2017
New Revision: 248734

URL: https://gcc.gnu.org/viewcvs?rev=248734&root=gcc&view=rev
Log:
PR libstdc++/80893 Fix null dereference in vector<bool>

        PR libstdc++/80893
        * include/bits/stl_bvector.h (vector<bool>::_M_initialize): Avoid
        null pointer dereference when size is zero.
        * testsuite/23_containers/vector/bool/80893.cc: New.
        * testsuite/util/testsuite_allocator.h (PointerBase::PointerBase):
        Add non-explicit constructor from nullptr.
        (PointerBase::derived() const): Add const-qualified overload.

Added:
    trunk/libstdc++-v3/testsuite/23_containers/vector/bool/80893.cc
Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/include/bits/stl_bvector.h
    trunk/libstdc++-v3/testsuite/util/testsuite_allocator.h