Unique_ptr C++の使用

Question

私はC++のRAIIの機能とは全く関係がありません。私は以前は使わなかった。とにかく私はそれについて勉強を始めています（私は "カーネルパニック"で）。私は次のエラーを持っているモジュールをコンパイル：

In file included from /usr/include/c++/6/memory:81:0, 
       from ./java/./rocksjni/compaction_filter_factory_jnicallback.h:13, 
       from java/rocksjni/compaction_filter_factory_jnicallback.cc:9: 
/usr/include/c++/6/bits/unique_ptr.h: In instantiation of ‘void std::unique_ptr<_Tp [], _Dp>::reset(_Up) [with _Up = char*; <template-parameter-2-2> = void; _Tp = const char; _Dp = std::default_delete<const char []>]’: 
/usr/include/c++/6/bits/unique_ptr.h:539:9: required from ‘typename std::enable_if<std::__and_<std::__and_<std::is_array<_Up>, std::is_same<typename std::unique_ptr<_Tp [], _Dp>::_Pointer::type, _Tp*>, std::is_same<typename std::unique_ptr<_Up, _Ep>::pointer, typename std::unique_ptr<_Up, _Ep>::element_type*>, std::is_convertible<typename std::unique_ptr<_Up, _Ep>::element_type (*)[], _Tp (*)[]>, std::__or_<std::__and_<std::is_reference<_Dp>, std::is_same<_T2, _U2> >, std::__and_<std::__not_<std::is_reference<_Dp> >, std::is_convertible<_Ep, _Dp> > > >, std::is_assignable<_T2&, _U2&&> >::value, std::unique_ptr<_Tp [], _Dp>&>::type std::unique_ptr<_Tp [], _Dp>::operator=(std::unique_ptr<_Up, _Ep>&&) [with _Up = char []; _Ep = std::default_delete<char []>; _Tp = const char; _Dp = std::default_delete<const char []>; typename std::enable_if<std::__and_<std::__and_<std::is_array<_Up>, std::is_same<typename std::unique_ptr<_Tp [], _Dp>::_Pointer::type, _Tp*>, std::is_same<typename std::unique_ptr<_Up, _Ep>::pointer, typename std::unique_ptr<_Up, _Ep>::element_type*>, std::is_convertible<typename std::unique_ptr<_Up, _Ep>::element_type (*)[], _Tp (*)[]>, std::__or_<std::__and_<std::is_reference<_Dp>, std::is_same<_T2, _U2> >, std::__and_<std::__not_<std::is_reference<_Dp> >, std::is_convertible<_Ep, _Dp> > > >, std::is_assignable<_T2&, _U2&&> >::value, std::unique_ptr<_Tp [], _Dp>&>::type = std::unique_ptr<const char []>&]’ 
java/rocksjni/compaction_filter_factory_jnicallback.cc:33:58: required from here 
/usr/include/c++/6/bits/unique_ptr.h:614:6: error: no matching function for call to ‘swap(const char*&, char*&)’ 
    swap(std::get<0>(_M_t), __p); 
    ~~~~^~~~~~~~~~~~~~~~~~~~~~~~ 
In file included from /usr/include/c++/6/bits/stl_pair.h:59:0, 
       from /usr/include/c++/6/bits/stl_algobase.h:64, 
       from /usr/include/c++/6/memory:62, 
       from ./java/./rocksjni/compaction_filter_factory_jnicallback.h:13, 
       from java/rocksjni/compaction_filter_factory_jnicallback.cc:9: 
/usr/include/c++/6/bits/move.h:179:5: note: candidate: template<class _Tp> typename std::enable_if<std::__and_<std::is_move_constructible<_Tp>, std::is_move_assignable<_Tp> >::value>::type std::swap(_Tp&, _Tp&) 
    swap(_Tp& __a, _Tp& __b) 
    ^~~~ 
/usr/include/c++/6/bits/move.h:179:5: note: template argument deduction/substitution failed: 
In file included from /usr/include/c++/6/memory:81:0, 
       from ./java/./rocksjni/compaction_filter_factory_jnicallback.h:13, 
       from java/rocksjni/compaction_filter_factory_jnicallback.cc:9: 
/usr/include/c++/6/bits/unique_ptr.h:614:6: note: deduced conflicting types for parameter ‘_Tp’ (‘const char*’ and ‘char*’) 
    swap(std::get<0>(_M_t), __p); 
    ~~~~^~~~~~~~~~~~~~~~~~~~~~~~ 
In file included from /usr/include/c++/6/bits/stl_pair.h:59:0, 
       from /usr/include/c++/6/bits/stl_algobase.h:64, 
       from /usr/include/c++/6/memory:62, 
       from ./java/./rocksjni/compaction_filter_factory_jnicallback.h:13, 
       from java/rocksjni/compaction_filter_factory_jnicallback.cc:9: 
/usr/include/c++/6/bits/move.h:202:5: note: candidate: template<class _Tp, long unsigned int _Nm> typename std::enable_if<std::__is_swappable<_Tp>::value>::type std::swap(_Tp (&)[_Nm], _Tp (&)[_Nm]) 
    swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm]) 
    ^~~~ 
/usr/include/c++/6/bits/move.h:202:5: note: template argument deduction/substitution failed: 
In file included from /usr/include/c++/6/memory:81:0, 
       from ./java/./rocksjni/compaction_filter_factory_jnicallback.h:13, 
       from java/rocksjni/compaction_filter_factory_jnicallback.cc:9: 
/usr/include/c++/6/bits/unique_ptr.h:614:6: note: mismatched types ‘_Tp [_Nm]’ and ‘std::__tuple_element_t<0ul, std::tuple<const char*, std::default_delete<const char []> > > {aka const char*}’ 
    swap(std::get<0>(_M_t), __p); 
    ~~~~^~~~~~~~~~~~~~~~~~~~~~~~ 
In file included from /usr/include/c++/6/bits/stl_algobase.h:64:0, 
       from /usr/include/c++/6/memory:62, 
       from ./java/./rocksjni/compaction_filter_factory_jnicallback.h:13, 
       from java/rocksjni/compaction_filter_factory_jnicallback.cc:9: 
/usr/include/c++/6/bits/stl_pair.h:471:5: note: candidate: template<class _T1, class _T2> void std::swap(std::pair<_T1, _T2>&, std::pair<_T1, _T2>&) 
    swap(pair<_T1, _T2>& __x, pair<_T1, _T2>& __y) 
    ^~~~ 
/usr/include/c++/6/bits/stl_pair.h:471:5: note: template argument deduction/substitution failed: 
In file included from /usr/include/c++/6/memory:81:0, 
       from ./java/./rocksjni/compaction_filter_factory_jnicallback.h:13, 
       from java/rocksjni/compaction_filter_factory_jnicallback.cc:9: 
/usr/include/c++/6/bits/unique_ptr.h:614:6: note: mismatched types ‘std::pair<_T1, _T2>’ and ‘std::__tuple_element_t<0ul, std::tuple<const char*, std::default_delete<const char []> > > {aka const char*}’ 
    swap(std::get<0>(_M_t), __p); 
    ~~~~^~~~~~~~~~~~~~~~~~~~~~~~ 
In file included from /usr/include/c++/6/string:52:0, 
       from /usr/include/c++/6/stdexcept:39, 
       from /usr/include/c++/6/array:39, 
       from /usr/include/c++/6/tuple:39, 
       from /usr/include/c++/6/functional:55, 
       from /usr/include/c++/6/memory:79, 
       from ./java/./rocksjni/compaction_filter_factory_jnicallback.h:13, 
       from java/rocksjni/compaction_filter_factory_jnicallback.cc:9: 
/usr/include/c++/6/bits/basic_string.h:5287:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> void std::swap(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&) 
    swap(basic_string<_CharT, _Traits, _Alloc>& __lhs, 
    ^~~~ 
/usr/include/c++/6/bits/basic_string.h:5287:5: note: template argument deduction/substitution failed: 
In file included from /usr/include/c++/6/memory:81:0, 
       from ./java/./rocksjni/compaction_filter_factory_jnicallback.h:13, 
       from java/rocksjni/compaction_filter_factory_jnicallback.cc:9: 
/usr/include/c++/6/bits/unique_ptr.h:614:6: note: mismatched types ‘std::__cxx11::basic_string<_CharT, _Traits, _Alloc>’ and ‘std::__tuple_element_t<0ul, std::tuple<const char*, std::default_delete<const char []> > > {aka const char*}’ 
    swap(std::get<0>(_M_t), __p); 
    ~~~~^~~~~~~~~~~~~~~~~~~~~~~~ 
In file included from /usr/include/c++/6/tuple:39:0, 
       from /usr/include/c++/6/functional:55, 
       from /usr/include/c++/6/memory:79, 
       from ./java/./rocksjni/compaction_filter_factory_jnicallback.h:13, 
       from java/rocksjni/compaction_filter_factory_jnicallback.cc:9: 
/usr/include/c++/6/array:275:5: note: candidate: template<class _Tp, long unsigned int _Nm> void std::swap(std::array<_Tp, _Nm>&, std::array<_Tp, _Nm>&) 
    swap(array<_Tp, _Nm>& __one, array<_Tp, _Nm>& __two) 
    ^~~~ 
/usr/include/c++/6/array:275:5: note: template argument deduction/substitution failed: 
In file included from /usr/include/c++/6/memory:81:0, 
       from ./java/./rocksjni/compaction_filter_factory_jnicallback.h:13, 
       from java/rocksjni/compaction_filter_factory_jnicallback.cc:9: 
/usr/include/c++/6/bits/unique_ptr.h:614:6: note: mismatched types ‘std::array<_Tp, _Nm>’ and ‘std::__tuple_element_t<0ul, std::tuple<const char*, std::default_delete<const char []> > > {aka const char*}’ 
    swap(std::get<0>(_M_t), __p); 
    ~~~~^~~~~~~~~~~~~~~~~~~~~~~~ 
In file included from /usr/include/c++/6/functional:55:0, 
       from /usr/include/c++/6/memory:79, 
       from ./java/./rocksjni/compaction_filter_factory_jnicallback.h:13, 
       from java/rocksjni/compaction_filter_factory_jnicallback.cc:9: 
/usr/include/c++/6/tuple:1546:5: note: candidate: template<class ... _Elements> void std::swap(std::tuple<_Elements ...>&, std::tuple<_Elements ...>&) 
    swap(tuple<_Elements...>& __x, tuple<_Elements...>& __y) 
    ^~~~ 
/usr/include/c++/6/tuple:1546:5: note: template argument deduction/substitution failed: 
In file included from /usr/include/c++/6/memory:81:0, 
       from ./java/./rocksjni/compaction_filter_factory_jnicallback.h:13, 
       from java/rocksjni/compaction_filter_factory_jnicallback.cc:9: 
/usr/include/c++/6/bits/unique_ptr.h:614:6: note: mismatched types ‘std::tuple<_Elements ...>’ and ‘std::__tuple_element_t<0ul, std::tuple<const char*, std::default_delete<const char []> > > {aka const char*}’ 
    swap(std::get<0>(_M_t), __p); 
    ~~~~^~~~~~~~~~~~~~~~~~~~~~~~ 
In file included from /usr/include/c++/6/memory:79:0, 
       from ./java/./rocksjni/compaction_filter_factory_jnicallback.h:13, 
       from java/rocksjni/compaction_filter_factory_jnicallback.cc:9: 
/usr/include/c++/6/functional:2238:5: note: candidate: template<class _Res, class ... _Args> void std::swap(std::function<_Res(_ArgTypes ...)>&, std::function<_Res(_ArgTypes ...)>&) 
    swap(function<_Res(_Args...)>& __x, function<_Res(_Args...)>& __y) 
    ^~~~ 
/usr/include/c++/6/functional:2238:5: note: template argument deduction/substitution failed: 
In file included from /usr/include/c++/6/memory:81:0, 
       from ./java/./rocksjni/compaction_filter_factory_jnicallback.h:13, 
       from java/rocksjni/compaction_filter_factory_jnicallback.cc:9: 
/usr/include/c++/6/bits/unique_ptr.h:614:6: note: mismatched types ‘std::function<_Res(_ArgTypes ...)>’ and ‘std::__tuple_element_t<0ul, std::tuple<const char*, std::default_delete<const char []> > > {aka const char*}’ 
    swap(std::get<0>(_M_t), __p); 
    ~~~~^~~~~~~~~~~~~~~~~~~~~~~~ 
In file included from /usr/include/c++/6/memory:81:0, 
       from ./java/./rocksjni/comparatorjnicallback.h:13, 
       from java/rocksjni/comparatorjnicallback.cc:9: 
/usr/include/c++/6/bits/unique_ptr.h: In instantiation of ‘void std::unique_ptr<_Tp [], _Dp>::reset(_Up) [with _Up = char*; <template-parameter-2-2> = void; _Tp = const char; _Dp = std::default_delete<const char []>]’: 
/usr/include/c++/6/bits/unique_ptr.h:539:9: required from ‘typename std::enable_if<std::__and_<std::__and_<std::is_array<_Up>, std::is_same<typename std::unique_ptr<_Tp [], _Dp>::_Pointer::type, _Tp*>, std::is_same<typename std::unique_ptr<_Up, _Ep>::pointer, typename std::unique_ptr<_Up, _Ep>::element_type*>, std::is_convertible<typename std::unique_ptr<_Up, _Ep>::element_type (*)[], _Tp (*)[]>, std::__or_<std::__and_<std::is_reference<_Dp>, std::is_same<_T2, _U2> >, std::__and_<std::__not_<std::is_reference<_Dp> >, std::is_convertible<_Ep, _Dp> > > >, std::is_assignable<_T2&, _U2&&> >::value, std::unique_ptr<_Tp [], _Dp>&>::type std::unique_ptr<_Tp [], _Dp>::operator=(std::unique_ptr<_Up, _Ep>&&) [with _Up = char []; _Ep = std::default_delete<char []>; _Tp = const char; _Dp = std::default_delete<const char []>; typename std::enable_if<std::__and_<std::__and_<std::is_array<_Up>, std::is_same<typename std::unique_ptr<_Tp [], _Dp>::_Pointer::type, _Tp*>, std::is_same<typename std::unique_ptr<_Up, _Ep>::pointer, typename std::unique_ptr<_Up, _Ep>::element_type*>, std::is_convertible<typename std::unique_ptr<_Up, _Ep>::element_type (*)[], _Tp (*)[]>, std::__or_<std::__and_<std::is_reference<_Dp>, std::is_same<_T2, _U2> >, std::__and_<std::__not_<std::is_reference<_Dp> >, std::is_convertible<_Ep, _Dp> > > >, std::is_assignable<_T2&, _U2&&> >::value, std::unique_ptr<_Tp [], _Dp>&>::type = std::unique_ptr<const char []>&]’ 
java/rocksjni/comparatorjnicallback.cc:34:21: required from here 
/usr/include/c++/6/bits/unique_ptr.h:614:6: error: no matching function for call to ‘swap(const char*&, char*&)’ 
    swap(std::get<0>(_M_t), __p); 
    ~~~~^~~~~~~~~~~~~~~~~~~~~~~~ 
In file included from /usr/include/c++/6/bits/stl_pair.h:59:0, 
       from /usr/include/c++/6/bits/stl_algobase.h:64, 
       from /usr/include/c++/6/memory:62, 
       from ./java/./rocksjni/comparatorjnicallback.h:13, 
       from java/rocksjni/comparatorjnicallback.cc:9: 
/usr/include/c++/6/bits/move.h:179:5: note: candidate: template<class _Tp> typename std::enable_if<std::__and_<std::is_move_constructible<_Tp>, std::is_move_assignable<_Tp> >::value>::type std::swap(_Tp&, _Tp&) 
    swap(_Tp& __a, _Tp& __b) 
    ^~~~ 
/usr/include/c++/6/bits/move.h:179:5: note: template argument deduction/substitution failed: 
In file included from /usr/include/c++/6/memory:81:0, 
       from ./java/./rocksjni/comparatorjnicallback.h:13, 
       from java/rocksjni/comparatorjnicallback.cc:9: 
/usr/include/c++/6/bits/unique_ptr.h:614:6: note: deduced conflicting types for parameter ‘_Tp’ (‘const char*’ and ‘char*’) 
    swap(std::get<0>(_M_t), __p); 
    ~~~~^~~~~~~~~~~~~~~~~~~~~~~~ 
In file included from /usr/include/c++/6/bits/stl_pair.h:59:0, 
       from /usr/include/c++/6/bits/stl_algobase.h:64, 
       from /usr/include/c++/6/memory:62, 
       from ./java/./rocksjni/comparatorjnicallback.h:13, 
       from java/rocksjni/comparatorjnicallback.cc:9: 
/usr/include/c++/6/bits/move.h:202:5: note: candidate: template<class _Tp, long unsigned int _Nm> typename std::enable_if<std::__is_swappable<_Tp>::value>::type std::swap(_Tp (&)[_Nm], _Tp (&)[_Nm]) 
    swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm]) 
    ^~~~ 
/usr/include/c++/6/bits/move.h:202:5: note: template argument deduction/substitution failed: 
In file included from /usr/include/c++/6/memory:81:0, 
       from ./java/./rocksjni/comparatorjnicallback.h:13, 
       from java/rocksjni/comparatorjnicallback.cc:9: 
/usr/include/c++/6/bits/unique_ptr.h:614:6: note: mismatched types ‘_Tp [_Nm]’ and ‘std::__tuple_element_t<0ul, std::tuple<const char*, std::default_delete<const char []> > > {aka const char*}’ 
    swap(std::get<0>(_M_t), __p); 
    ~~~~^~~~~~~~~~~~~~~~~~~~~~~~ 
In file included from /usr/include/c++/6/bits/stl_algobase.h:64:0, 
       from /usr/include/c++/6/memory:62, 
       from ./java/./rocksjni/comparatorjnicallback.h:13, 
       from java/rocksjni/comparatorjnicallback.cc:9: 
/usr/include/c++/6/bits/stl_pair.h:471:5: note: candidate: template<class _T1, class _T2> void std::swap(std::pair<_T1, _T2>&, std::pair<_T1, _T2>&) 
    swap(pair<_T1, _T2>& __x, pair<_T1, _T2>& __y) 
    ^~~~ 
/usr/include/c++/6/bits/stl_pair.h:471:5: note: template argument deduction/substitution failed: 
In file included from /usr/include/c++/6/memory:81:0, 
       from ./java/./rocksjni/comparatorjnicallback.h:13, 
       from java/rocksjni/comparatorjnicallback.cc:9: 
/usr/include/c++/6/bits/unique_ptr.h:614:6: note: mismatched types ‘std::pair<_T1, _T2>’ and ‘std::__tuple_element_t<0ul, std::tuple<const char*, std::default_delete<const char []> > > {aka const char*}’ 
    swap(std::get<0>(_M_t), __p); 
    ~~~~^~~~~~~~~~~~~~~~~~~~~~~~ 
In file included from /usr/include/c++/6/string:52:0, 
       from /usr/include/c++/6/stdexcept:39, 
       from /usr/include/c++/6/array:39, 
       from /usr/include/c++/6/tuple:39, 
       from /usr/include/c++/6/functional:55, 
       from /usr/include/c++/6/memory:79, 
       from ./java/./rocksjni/comparatorjnicallback.h:13, 
       from java/rocksjni/comparatorjnicallback.cc:9: 
/usr/include/c++/6/bits/basic_string.h:5287:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> void std::swap(std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&) 
    swap(basic_string<_CharT, _Traits, _Alloc>& __lhs, 
    ^~~~ 
/usr/include/c++/6/bits/basic_string.h:5287:5: note: template argument deduction/substitution failed: 
In file included from /usr/include/c++/6/memory:81:0, 
       from ./java/./rocksjni/comparatorjnicallback.h:13, 
       from java/rocksjni/comparatorjnicallback.cc:9: 
/usr/include/c++/6/bits/unique_ptr.h:614:6: note: mismatched types ‘std::__cxx11::basic_string<_CharT, _Traits, _Alloc>’ and ‘std::__tuple_element_t<0ul, std::tuple<const char*, std::default_delete<const char []> > > {aka const char*}’ 
    swap(std::get<0>(_M_t), __p); 
    ~~~~^~~~~~~~~~~~~~~~~~~~~~~~ 
In file included from /usr/include/c++/6/tuple:39:0, 
       from /usr/include/c++/6/functional:55, 
       from /usr/include/c++/6/memory:79, 
       from ./java/./rocksjni/comparatorjnicallback.h:13, 
       from java/rocksjni/comparatorjnicallback.cc:9: 
/usr/include/c++/6/array:275:5: note: candidate: template<class _Tp, long unsigned int _Nm> void std::swap(std::array<_Tp, _Nm>&, std::array<_Tp, _Nm>&) 
    swap(array<_Tp, _Nm>& __one, array<_Tp, _Nm>& __two) 
    ^~~~ 
/usr/include/c++/6/array:275:5: note: template argument deduction/substitution failed: 
In file included from /usr/include/c++/6/memory:81:0, 
       from ./java/./rocksjni/comparatorjnicallback.h:13, 
       from java/rocksjni/comparatorjnicallback.cc:9: 
/usr/include/c++/6/bits/unique_ptr.h:614:6: note: mismatched types ‘std::array<_Tp, _Nm>’ and ‘std::__tuple_element_t<0ul, std::tuple<const char*, std::default_delete<const char []> > > {aka const char*}’ 
    swap(std::get<0>(_M_t), __p); 
    ~~~~^~~~~~~~~~~~~~~~~~~~~~~~ 
In file included from /usr/include/c++/6/functional:55:0, 
       from /usr/include/c++/6/memory:79, 
       from ./java/./rocksjni/comparatorjnicallback.h:13, 
       from java/rocksjni/comparatorjnicallback.cc:9: 
/usr/include/c++/6/tuple:1546:5: note: candidate: template<class ... _Elements> void std::swap(std::tuple<_Elements ...>&, std::tuple<_Elements ...>&) 
    swap(tuple<_Elements...>& __x, tuple<_Elements...>& __y) 
    ^~~~ 
/usr/include/c++/6/tuple:1546:5: note: template argument deduction/substitution failed: 
In file included from /usr/include/c++/6/memory:81:0, 
       from ./java/./rocksjni/comparatorjnicallback.h:13, 
       from java/rocksjni/comparatorjnicallback.cc:9: 
/usr/include/c++/6/bits/unique_ptr.h:614:6: note: mismatched types ‘std::tuple<_Elements ...>’ and ‘std::__tuple_element_t<0ul, std::tuple<const char*, std::default_delete<const char []> > > {aka const char*}’ 
    swap(std::get<0>(_M_t), __p); 
    ~~~~^~~~~~~~~~~~~~~~~~~~~~~~ 
In file included from /usr/include/c++/6/memory:79:0, 
       from ./java/./rocksjni/comparatorjnicallback.h:13, 
       from java/rocksjni/comparatorjnicallback.cc:9: 
/usr/include/c++/6/functional:2238:5: note: candidate: template<class _Res, class ... _Args> void std::swap(std::function<_Res(_ArgTypes ...)>&, std::function<_Res(_ArgTypes ...)>&) 
    swap(function<_Res(_Args...)>& __x, function<_Res(_Args...)>& __y) 
    ^~~~ 
/usr/include/c++/6/functional:2238:5: note: template argument deduction/substitution failed: 
In file included from /usr/include/c++/6/memory:81:0, 
       from ./java/./rocksjni/comparatorjnicallback.h:13, 
       from java/rocksjni/comparatorjnicallback.cc:9: 
/usr/include/c++/6/bits/unique_ptr.h:614:6: note: mismatched types ‘std::function<_Res(_ArgTypes ...)>’ and ‘std::__tuple_element_t<0ul, std::tuple<const char*, std::default_delete<const char []> > > {aka const char*}’ 
    swap(std::get<0>(_M_t), __p); 

私はこのスタックトレースを理解することはよく分からないが、それはunique_ptrをで不一致がある縫い目。多分const char *とchar *です。バグがある

クラスは次のとおりです。

CompactionFilterFactoryJniCallback::CompactionFilterFactoryJniCallback(
    JNIEnv* env, jobject jcompaction_filter_factory) 
    : JniCallback(env, jcompaction_filter_factory) { 

    // Note: The name of a CompactionFilterFactory will not change during 
    // it's lifetime, so we cache it in a global var 
    jmethodID jname_method_id = 
     AbstractCompactionFilterFactoryJni::getNameMethodId(env); 
    if(jname_method_id == nullptr) { 
    // exception thrown: NoSuchMethodException or OutOfMemoryError 
    return; 
    } 

    jstring jname = 
     (jstring)env->CallObjectMethod(m_jcallback_obj, jname_method_id); 
    if(env->ExceptionCheck()) { 
    // exception thrown 
    return; 
    } 
    jboolean has_exception = JNI_FALSE; 
// line 33 
    m_name = JniUtil::copyString(env, jname, &has_exception); // also releases jname 
    if (has_exception == JNI_TRUE) { 
    // exception thrown 
    return; 
    } 

    m_jcreate_compaction_filter_methodid = 
     AbstractCompactionFilterFactoryJni::getCreateCompactionFilterMethodId(env); 
    if(m_jcreate_compaction_filter_methodid == nullptr) { 
    // exception thrown: NoSuchMethodException or OutOfMemoryError 
    return; 
    } 
} 

const char* CompactionFilterFactoryJniCallback::Name() const { 
    return m_name.get(); 
} 

std::unique_ptr<CompactionFilter> CompactionFilterFactoryJniCallback::CreateCompactionFilter(
    const CompactionFilter::Context& context) { 
    jboolean attached_thread = JNI_FALSE; 
    JNIEnv* env = getJniEnv(&attached_thread); 
    assert(env != nullptr); 

    jlong addr_compaction_filter = env->CallLongMethod(m_jcallback_obj, 
     m_jcreate_compaction_filter_methodid, 
     static_cast<jboolean>(context.is_full_compaction), 
     static_cast<jboolean>(context.is_manual_compaction)); 

    if(env->ExceptionCheck()) { 
    // exception thrown from CallLongMethod 
    env->ExceptionDescribe(); // print out exception to stderr 
    releaseJniEnv(attached_thread); 
    return nullptr; 
    } 

    auto* const cff = reinterpret_cast<CompactionFilter*>(addr_compaction_filter); 

    releaseJniEnv(attached_thread); 

    return std::unique_ptr<CompactionFilter>(cff); 
} 

問題を識別するために、このスタックトレースを読み取る方法は明らかではありません。どのようにして問題を修正し、スタックトレースを読むかを理解するための少しの提案を受け取っていただければ幸いです。

Answer 1

エラーは、resetを引数として渡そうとしているstd::unique_ptr<char const[]>オブジェクトを持っていると言います。char*を引数として渡します。

まあ、その引数はあなたがconst_cast、例えばで達成することができた、コンパイルにそのためのchar const*する必要があります：

std::unique_ptr<char const[]> p; 
char* q = new char[1]{}; 
p.reset(const_cast<char const*>(q)); 

---

JniUtil::copyString戻りstd::unique_ptr<char[]>ように見え、あなたが原因となるstd::unique_ptr<char const[]>に割り当てエラー。

1つの修正方法は、m_nameのタイプをstd::unique_ptr<char[]>に変更することです。

もう一つは、（const性を追加することが安全であると暗黙的な変換ですが、std::unique_ptr<>::resetの正しいオーバーロードを選択するために、ここで必要とされている）を手動const性を追加することです：行は33行である

m_name.reset(const_cast<char const*>(JniUtil::copyString(...).release()));