80     : __cbeg_(nullptr),  in __libcpp_db()
81       __cend_(nullptr),  in __libcpp_db()
83       __ibeg_(nullptr),  in __libcpp_db()
84       __iend_(nullptr),  in __libcpp_db()
95             if (*p != nullptr)  in ~__libcpp_db()
107             if (*p != nullptr)  in ~__libcpp_db()
124     _LIBCPP_ASSERT(i != nullptr, "iterator not found in debug database.");  in __find_c_from_i()
125     return i->__c_ != nullptr ? i->__c_->__c_ : nullptr;  in __find_c_from_i()
138     if (c == nullptr)  in __insert_ic()
143         if (c == nullptr)  in __insert_ic()
161         if (cbeg == nullptr)  in __insert_c()
167             while (q != nullptr)  in __insert_c()
183     if (buf == nullptr)  in __insert_c()
200         if (p != nullptr)  in __erase_i()
202             __i_node* q = nullptr;  in __erase_i()
207                 if (p == nullptr)  in __erase_i()
210             if (q == nullptr)  in __erase_i()
216             if (c != nullptr)  in __erase_i()
233         if (p == nullptr)  in __invalidate_all()
238             if (p == nullptr)  in __invalidate_all()
244             (*p->end_)->__c_ = nullptr;  in __invalidate_all()
260         return nullptr;  in __find_c_and_lock()
264     if (p == nullptr)  in __find_c_and_lock()
269         return nullptr;  in __find_c_and_lock()
274         if (p == nullptr)  in __find_c_and_lock()
279             return nullptr;  in __find_c_and_lock()
290     _LIBCPP_ASSERT(p != nullptr, "debug mode internal logic error __find_c A");  in __find_c()
294         _LIBCPP_ASSERT(p != nullptr, "debug mode internal logic error __find_c B");  in __find_c()
317         if (p == nullptr)  in __erase_c()
319         __c_node* q = nullptr;  in __erase_c()
320         _LIBCPP_ASSERT(p != nullptr, "debug mode internal logic error __erase_c A");  in __erase_c()
325             if (p == nullptr)  in __erase_c()
327             _LIBCPP_ASSERT(p != nullptr, "debug mode internal logic error __erase_c B");  in __erase_c()
329         if (q == nullptr)  in __erase_c()
336             (*p->end_)->__c_ = nullptr;  in __erase_c()
352     __c_node* c0 = i0 != nullptr ? i0->__c_ : nullptr;  in __iterator_copy()
353     if (i == nullptr && i0 != nullptr)  in __iterator_copy()
355     __c_node* c = i != nullptr ? i->__c_ : nullptr;  in __iterator_copy()
358         if (c != nullptr)  in __iterator_copy()
360         if (i != nullptr)  in __iterator_copy()
362             i->__c_ = nullptr;  in __iterator_copy()
363             if (c0 != nullptr)  in __iterator_copy()
379     return i != nullptr && i->__c_ != nullptr && i->__c_->__dereferenceable(__i);  in __dereferenceable()
389     return i != nullptr && i->__c_ != nullptr && i->__c_->__decrementable(__i);  in __decrementable()
399     return i != nullptr && i->__c_ != nullptr && i->__c_->__addable(__i, __n);  in __addable()
409     return i != nullptr && i->__c_ != nullptr && i->__c_->__subscriptable(__i, __n);  in __subscriptable()
420     __c_node* ci = i != nullptr ? i->__c_ : nullptr;  in __less_than_comparable()
421     __c_node* cj = j != nullptr ? j->__c_ : nullptr;  in __less_than_comparable()
433     _LIBCPP_ASSERT(p1 != nullptr, "debug mode internal logic error swap A");  in swap()
437         _LIBCPP_ASSERT(p1 != nullptr, "debug mode internal logic error swap B");  in swap()
441     _LIBCPP_ASSERT(p2 != nullptr, "debug mode internal logic error swap C");  in swap()
445         _LIBCPP_ASSERT(p2 != nullptr, "debug mode internal logic error swap D");  in swap()
475         if (beg == nullptr)  in __add()
498         if (ibeg == nullptr)  in __insert_iterator()
504             while (q != nullptr)  in __insert_iterator()
521     if (r == nullptr)  in __insert_iterator()
524     ::new(r) __i_node(__i, p, nullptr);  in __insert_iterator()
533     __i_node* r = nullptr;  in __find_iterator()
537         for (__i_node* nd = __ibeg_[h]; nd != nullptr; nd = nd->__next_)  in __find_iterator()