crash on rfl::json::save() while serializing struct with std::wstring containing cyrilic and japan chars

[AndriyOm]

I have "settings " structure with std::wstring with cyrillic, japan chars in it.

struct settingsInt
{
std::wstring picture_pathname{L"Вітаю_おめでとう"};
//std::string picture_pathname_utf8; //here string as utf8 only for saving. Crashes on save with wstring. Reason: wstring path with cyrillic or japan chars.
int int_cluster_matching_width;
int int_width_divisor;
...
} settings;

Crashing on writing json file using:
rfl::json::save("settings.json"), settings, rfl::json::pretty);

For now I turned to std::string and using UTF-8 encoding to save.
Reflect CPP version from appr,. 26.04.2025

Latest VS and Win10

[liuzicheng1987]

Can you show me the error message or stack trace?

[AndriyOm]

ucrtbase.dll!00007ffecda0286e()	Unknown
ucrtbase.dll!00007ffecda01f9f()	Unknown
vcruntime140_1.dll!00007ffe46f61911()	Unknown
vcruntime140_1.dll!00007ffe46f6218f()	Unknown
vcruntime140_1.dll!00007ffe46f621e9()	Unknown
vcruntime140_1.dll!00007ffe46f64019()	Unknown

RegeneratePIC.exe!__GSHandlerCheck_EH4(_EXCEPTION_RECORD * ExceptionRecord, void * EstablisherFrame, _CONTEXT * ContextRecord, _DISPATCHER_CONTEXT * DispatcherContext) Line 86 C++
ntdll.dll!00007ffed03528bf() Unknown
ntdll.dll!00007ffed0302554() Unknown
ntdll.dll!00007ffed03513ce() Unknown
KernelBase.dll!00007ffecdbab699() Unknown
vcruntime140.dll!00007ffe98b05267() Unknown
msvcp140.dll!00007ffe84659502() Unknown
RegeneratePIC.exe!std::_Xlen_string() Line 512 C++
RegeneratePIC.exe!std::string::_Reallocate_grow_by<std::string::append'::2'::<lambda_1>,unsigned __int64,char>(const unsigned __int64 _Size_increase, std::string::append::__l2::<lambda_1> <_Args_0>, unsigned __int64) Line 2994 C++
[Inline Frame] RegeneratePIC.exe!std::string::append(const unsigned __int64 _Count, const char) Line 1525 C++
[Inline Frame] RegeneratePIC.exe!std::string::resize(const unsigned __int64) Line 2364 C++
RegeneratePIC.exe!rfl::parsing::Parser<rfl::json::Reader,rfl::json::Writer,std::wstring,rfl::Processors<>>::write<rfl::parsing::Parentrfl::json::Writer::Object>(const rfl::json::Writer & _w, const std::wstring & _str, const rfl::parsing::Parentrfl::json::Writer::Object & _parent) Line 74 C++
[Inline Frame] RegeneratePIC.exe!rfl::parsing::Parser<rfl::json::Reader,rfl::json::Writer,std::wstring const *,rfl::Processors<>>::write(const rfl::json::Writer &) Line 55 C++
[Inline Frame] RegeneratePIC.exe!rfl::parsing::NamedTupleParser<rfl::json::Reader,rfl::json::Writer,0,0,0,rfl::Processors<>,rfl::Field<rfl::internal::StringLiteral<19>{std::array<char,19>{char{80,82,79,77,80,84,95,102,111,114,95,68,101,116,97,105,108,115,0}}},bool const *>,rfl::Field<rfl::internal::StringLiteral<17>{std::array<char,17>{char{112,105,99,116,117,114,101,95,112,97,116,104,110,97,109,101,0}}},std::wstring const *>,rfl::Field<rfl::internal::StringLiteral<12>{std::array<char,12>{char{68,66,95,112,97,116,104,110,97,109,101,0}}},std::wstring const *>,rfl::Field<rfl::internal::StringLiteral<24>{std::array<char,24>{char{111,117,116,112,117,116,95,112,105,99,116,117,114,101,95,112,97,116,104,110,97,109,101,0}}},std::wstring const *>,rfl::Field<rfl::internal::StringLiteral<27>{std::array<char,27>{char{105,110,116,95,99,108,117,115,116,101,114,95,109,97,116,99,104,105,110,103,95,119,105,100,116,104,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<18>{std::array<char,18>{char{105,110,116,95,119,105,100,116,104,95,100,105,118,105,115,111,114,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<27>{std::array<char,27>{char{101,110,117,109,95,109,97,116,99,104,105,110,103,95,111,114,95,99,114,111,112,95,116,121,112,101,0}}},enum CROPTYPE const *>,rfl::Field<rfl::internal::StringLiteral<22>{std::array<char,22>{char{105,110,116,95,109,97,116,99,104,105,110,103,95,102,117,110,99,116,105,111,110,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<21>{std::array<char,21>{char{105,110,116,95,103,97,109,109,97,95,99,111,114,114,101,99,116,105,111,110,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<21>{std::array<char,21>{char{105,110,116,95,110,111,95,99,111,108,111,114,95,99,111,110,116,114,111,108,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<38>{std::array<char,38>{char{105,110,116,95,99,108,117,115,116,101,114,95,104,105,103,104,95,102,111,114,95,99,114,111,112,112,101,100,95,109,97,116,99,104,105,110,103,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<35>{std::array<char,35>{char{105,110,116,95,100,101,116,97,105,108,115,95,102,111,114,95,102,117,108,108,95,104,105,103,104,95,109,97,116,99,104,105,110,103,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<20>{std::array<char,20>{char{105,110,116,95,110,111,95,115,117,98,115,112,108,105,116,116,105,110,103,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<19>{std::array<char,19>{char{105,110,116,95,103,114,97,121,115,99,97,108,101,95,109,111,100,101,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<35>{std::array<char,35>{char{115,116,95,100,101,112,116,104,95,102,111,114,95,102,117,108,108,95,104,105,103,104,95,77,117,108,116,105,77,97,116,99,104,50,0}}},unsigned __int64 const *>,rfl::Field<rfl::internal::StringLiteral<39>{std::array<char,39>{char{105,110,116,95,109,97,116,99,104,95,102,117,110,99,116,105,111,110,95,102,111,114,95,102,108,111,97,116,95,102,117,108,108,95,104,105,103,104,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<55>{std::array<char,55>{char{105,110,116,95,112,101,114,99,101,110,116,95,119,111,114,115,101,95,99,108,117,115,116,101,114,95,116,111,95,105,103,110,111,114,101,95,102,111,114,95,70,117,108,108,72,105,103,104,70,108,111,97,116,55,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<45>{std::array<char,45>{char{105,110,116,95,109,97,120,105,109,97,108,95,112,105,99,116,117,114,101,95,117,115,97,103,101,95,102,111,114,95,70,117,108,108,72,105,103,104,70,108,111,97,116,55,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<6>{std::array<char,6>{char{103,97,109,109,97,0}}},double const *>,rfl::Field<rfl::internal::StringLiteral<12>{std::array<char,12>{char{88,95,115,117,98,95,115,112,108,105,116,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<12>{std::array<char,12>{char{89,95,115,117,98,95,115,112,108,105,116,0}}},int const *>,rfl::Field<rfl::internal:c6c3c03ade7ca4094c3ea338e3c80f2a::add_field_to_object(const rfl::json::Writer &) Line 203 C++
RegeneratePIC.exe!??@30caff2fbb36802dcc302e04b6d09972@(const rfl::json::Writer & _w, const rfl::NamedTuple<rfl::Field<rfl::internal::StringLiteral<19>{std::array<char,19>{char{80,82,79,77,80,84,95,102,111,114,95,68,101,116,97,105,108,115,0}}},bool const *>,rfl::Field<rfl::internal::StringLiteral<17>{std::array<char,17>{char{112,105,99,116,117,114,101,95,112,97,116,104,110,97,109,101,0}}},std::wstring const *>,rfl::Field<rfl::internal::StringLiteral<12>{std::array<char,12>{char{68,66,95,112,97,116,104,110,97,109,101,0}}},std::wstring const *>,rfl::Field<rfl::internal::StringLiteral<24>{std::array<char,24>{char{111,117,116,112,117,116,95,112,105,99,116,117,114,101,95,112,97,116,104,110,97,109,101,0}}},std::wstring const *>,rfl::Field<rfl::internal::StringLiteral<27>{std::array<char,27>{char{105,110,116,95,99,108,117,115,116,101,114,95,109,97,116,99,104,105,110,103,95,119,105,100,116,104,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<18>{std::array<char,18>{char{105,110,116,95,119,105,100,116,104,95,100,105,118,105,115,111,114,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<27>{std::array<char,27>{char{101,110,117,109,95,109,97,116,99,104,105,110,103,95,111,114,95,99,114,111,112,95,116,121,112,101,0}}},enum CROPTYPE const *>,rfl::Field<rfl::internal::StringLiteral<22>{std::array<char,22>{char{105,110,116,95,109,97,116,99,104,105,110,103,95,102,117,110,99,116,105,111,110,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<21>{std::array<char,21>{char{105,110,116,95,103,97,109,109,97,95,99,111,114,114,101,99,116,105,111,110,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<21>{std::array<char,21>{char{105,110,116,95,110,111,95,99,111,108,111,114,95,99,111,110,116,114,111,108,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<38>{std::array<char,38>{char{105,110,116,95,99,108,117,115,116,101,114,95,104,105,103,104,95,102,111,114,95,99,114,111,112,112,101,100,95,109,97,116,99,104,105,110,103,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<35>{std::array<char,35>{char{105,110,116,95,100,101,116,97,105,108,115,95,102,111,114,95,102,117,108,108,95,104,105,103,104,95,109,97,116,99,104,105,110,103,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<20>{std::array<char,20>{char{105,110,116,95,110,111,95,115,117,98,115,112,108,105,116,116,105,110,103,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<19>{std::array<char,19>{char{105,110,116,95,103,114,97,121,115,99,97,108,101,95,109,111,100,101,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<35>{std::array<char,35>{char{115,116,95,100,101,112,116,104,95,102,111,114,95,102,117,108,108,95,104,105,103,104,95,77,117,108,116,105,77,97,116,99,104,50,0}}},unsigned __int64 const *>,rfl::Field<rfl::internal::StringLiteral<39>{std::array<char,39>{char{105,110,116,95,109,97,116,99,104,95,102,117,110,99,116,105,111,110,95,102,111,114,95,102,108,111,97,116,95,102,117,108,108,95,104,105,103,104,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<55>{std::array<char,55>{char{105,110,116,95,112,101,114,99,101,110,116,95,119,111,114,115,101,95,99,108,117,115,116,101,114,95,116,111,95,105,103,110,111,114,101,95,102,111,114,95,70,117,108,108,72,105,103,104,70,108,111,97,116,55,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<45>{std::array<char,45>{char{105,110,116,95,109,97,120,105,109,97,108,95,112,105,99,116,117,114,101,95,117,115,97,103,101,95,102,111,114,95,70,117,108,108,72,105,103,104,70,108,111,97,116,55,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<6>{std::array<char,6>{char{103,97,109,109,97,0}}},double const *>,rfl::Field<rfl::internal::StringLiteral<12>{std::array<char,12>{char{88,95,115,117,98,95,115,112,108,105,116,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<12>{std::array<char,12>{char{89,95,115,117,98,95,115,112,108,105,116,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<33>{std::array<char,33>{char{100,105,115,116,97,110,99,101,9c5a440d4fc96d0208c7ab65a41f3ab02 & _tup, rfl::json::Writer::YYJSONOutputObject * _ptr, std::integer_sequence<int,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25> __formal) Line 228 C++
[Inline Frame] RegeneratePIC.exe!rfl::parsing::NamedTupleParser<rfl::json::Reader,rfl::json::Writer,0,0,0,rfl::Processors<>,rfl::Field<rfl::internal::StringLiteral<19>{std::array<char,19>{char{80,82,79,77,80,84,95,102,111,114,95,68,101,116,97,105,108,115,0}}},bool const *>,rfl::Field<rfl::internal::StringLiteral<17>{std::array<char,17>{char{112,105,99,116,117,114,101,95,112,97,116,104,110,97,109,101,0}}},std::wstring const *>,rfl::Field<rfl::internal::StringLiteral<12>{std::array<char,12>{char{68,66,95,112,97,116,104,110,97,109,101,0}}},std::wstring const *>,rfl::Field<rfl::internal::StringLiteral<24>{std::array<char,24>{char{111,117,116,112,117,116,95,112,105,99,116,117,114,101,95,112,97,116,104,110,97,109,101,0}}},std::wstring const *>,rfl::Field<rfl::internal::StringLiteral<27>{std::array<char,27>{char{105,110,116,95,99,108,117,115,116,101,114,95,109,97,116,99,104,105,110,103,95,119,105,100,116,104,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<18>{std::array<char,18>{char{105,110,116,95,119,105,100,116,104,95,100,105,118,105,115,111,114,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<27>{std::array<char,27>{char{101,110,117,109,95,109,97,116,99,104,105,110,103,95,111,114,95,99,114,111,112,95,116,121,112,101,0}}},enum CROPTYPE const *>,rfl::Field<rfl::internal::StringLiteral<22>{std::array<char,22>{char{105,110,116,95,109,97,116,99,104,105,110,103,95,102,117,110,99,116,105,111,110,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<21>{std::array<char,21>{char{105,110,116,95,103,97,109,109,97,95,99,111,114,114,101,99,116,105,111,110,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<21>{std::array<char,21>{char{105,110,116,95,110,111,95,99,111,108,111,114,95,99,111,110,116,114,111,108,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<38>{std::array<char,38>{char{105,110,116,95,99,108,117,115,116,101,114,95,104,105,103,104,95,102,111,114,95,99,114,111,112,112,101,100,95,109,97,116,99,104,105,110,103,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<35>{std::array<char,35>{char{105,110,116,95,100,101,116,97,105,108,115,95,102,111,114,95,102,117,108,108,95,104,105,103,104,95,109,97,116,99,104,105,110,103,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<20>{std::array<char,20>{char{105,110,116,95,110,111,95,115,117,98,115,112,108,105,116,116,105,110,103,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<19>{std::array<char,19>{char{105,110,116,95,103,114,97,121,115,99,97,108,101,95,109,111,100,101,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<35>{std::array<char,35>{char{115,116,95,100,101,112,116,104,95,102,111,114,95,102,117,108,108,95,104,105,103,104,95,77,117,108,116,105,77,97,116,99,104,50,0}}},unsigned __int64 const *>,rfl::Field<rfl::internal::StringLiteral<39>{std::array<char,39>{char{105,110,116,95,109,97,116,99,104,95,102,117,110,99,116,105,111,110,95,102,111,114,95,102,108,111,97,116,95,102,117,108,108,95,104,105,103,104,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<55>{std::array<char,55>{char{105,110,116,95,112,101,114,99,101,110,116,95,119,111,114,115,101,95,99,108,117,115,116,101,114,95,116,111,95,105,103,110,111,114,101,95,102,111,114,95,70,117,108,108,72,105,103,104,70,108,111,97,116,55,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<45>{std::array<char,45>{char{105,110,116,95,109,97,120,105,109,97,108,95,112,105,99,116,117,114,101,95,117,115,97,103,101,95,102,111,114,95,70,117,108,108,72,105,103,104,70,108,111,97,116,55,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<6>{std::array<char,6>{char{103,97,109,109,97,0}}},double const *>,rfl::Field<rfl::internal::StringLiteral<12>{std::array<char,12>{char{88,95,115,117,98,95,115,112,108,105,116,0}}},int const *>,rfl::Field<rfl::internal::StringLiteral<12>{std::array<char,12>{char{89,95,115,117,98,95,115,112,108,105,116,0}}},int const *>,rfl::Field<rfl::internal:c6c3c03ade7ca4094c3ea338e3c80f2a::write(const rfl::json::Writer &) Line 157 C++
RegeneratePIC.exe!rfl::parsing::Parser<rfl::json::Reader,rfl::json::Writer,settingsInt,rfl::Processors<>>::write<rfl::parsing::Parentrfl::json::Writer::Root>(const rfl::json::Writer & _w, const settingsInt & _var, const rfl::parsing::Parentrfl::json::Writer::Root &) Line 127 C++
[Inline Frame] RegeneratePIC.exe!rfl::parsing::Parser<rfl::json::Reader,rfl::json::Writer,SETTINGS,rfl::Processors<>>::write(const rfl::json::Writer &) Line 116 C++
[Inline Frame] RegeneratePIC.exe!rfl::json::write(const SETTINGS & _flag, std::basic_ostream<char,std::char_traits> &) Line 45 C++
[Inline Frame] RegeneratePIC.exe!rfl::json::save::__l2::<lambda_1>::operator()(const SETTINGS &) Line 25 C++
RegeneratePIC.exe!rfl::io::save_string<SETTINGS,rfl::json::save<,SETTINGS>'::2'::<lambda_1>>(const std::string & _fname, const SETTINGS & _obj, const rfl::json::save::__l2::<lambda_1> & _write) Line 19 C++
RegeneratePIC.exe!rfl::json::save<,SETTINGS>(const std::string & _fname, const SETTINGS & _obj, const unsigned int) Line 27 C++
RegeneratePIC.exe!wmain(int argc, wchar_t * * argv) Line 846 C++
[External Code]

[AndriyOm]

Code:
settings.DB_pathname = L"Вітаю_おめでとう";
//save settings as JSON
try {
rfl::json::save("_settings.json", settings, rfl::json::pretty);
}
catch (cv::Exception& ex) {
wprintf(L"Exception saving json settings: %s\n%s\n", NewFileFullName.c_str(), ex.what());
}

[AndriyOm]

Important remark:
System locale settings in Windows 10: German. Without "Beta: Use Unicode UTF-8 for worldwide language support".

If System locale settings in Windows 10: German and Checkbox activated "Beta: Use Unicode UTF-8 for worldwide language support"
the app doesnt crash, but wstring written not completely to JSON:

here:
{
"PROMPT_for_Details": false,
"DB_pathname": "Вітаю_",
"int_grayscale_mode": 1,
...
}