Search results

function argument safety check silently optimized out in release build by clang

kind: bug

Status: Open.

#5048 In nlohmann/json;

· risa2000 opened on Jan 7, 2026

[C++23] Error in json::parse with std::ifstream

kind: bug

Status: Open.

#5047 In nlohmann/json;

· Biraru opened on Jan 7, 2026

implicit conversion of return json to std::optional no longer implicit

kind: bug

Status: Open.

#5046 In nlohmann/json;

· risa2000 opened on Jan 6, 2026

get enum with default value

kind: bug

solution: proposed fixa fix for the issue has been proposed and waits for confirmationa fix for the issue has been proposed and waits for confirmation

Status: Open.

#5036 In nlohmann/json;

· IamRezaMousavi opened on Dec 20, 2025

std::map and std::unordered_map serialization broken for keys of type std::u16string

kind: bug

solution: proposed fixa fix for the issue has been proposed and waits for confirmationa fix for the issue has been proposed and waits for confirmation

state: please discussplease discuss the issue or vote for your favorite optionplease discuss the issue or vote for your favorite option

Status: Open.

#5023 In nlohmann/json;

· mehecip opened on Dec 3, 2025

error_handler_t::ignore documentation is incorrect

documentation

kind: bug

Status: Open.

#5012 In nlohmann/json;

· rakshasa opened on Nov 24, 2025

MSVC / Modules compatibility

platform: visual studiorelated to MSVCrelated to MSVC

state: help neededthe issue needs help to proceedthe issue needs help to proceed

Status: Open.

#5010 In nlohmann/json;

· nlohmann opened on Nov 23, 2025

Serialization of double type data gets stuck

kind: bug

state: needs more infothe author of the issue needs to provide more detailsthe author of the issue needs to provide more details

Status: Open.

#5005 In nlohmann/json;

· zhaoyuRobotics opened on Nov 20, 2025

VS2026 Insiders, C2678 With C++23 Modules

kind: bug

platform: visual studiorelated to MSVCrelated to MSVC

state: help neededthe issue needs help to proceedthe issue needs help to proceed

Status: Open.

#5002 In nlohmann/json;

· ToddThomson opened on Nov 18, 2025

Tests don't build with VS 2026

kind: bug

platform: visual studiorelated to MSVCrelated to MSVC

state: help neededthe issue needs help to proceedthe issue needs help to proceed

Status: Open.

#4996 In nlohmann/json;

· t-b opened on Nov 14, 2025

[MSVC][build] JSON failed with error C2672: 'nlohmann::json_abi_v3_12_0::basic_json<std::map,std::vector,std::string,bool,int64_t,uint64_t,double,

kind: bug

platform: visual studiorelated to MSVCrelated to MSVC

state: help neededthe issue needs help to proceedthe issue needs help to proceed

Status: Open.

#4974 In nlohmann/json;

· QuellaZhang opened on Oct 30, 2025

Natvis file for version 3.12.0 does not contain a type definition for detail::json_default_base

kind: bug

solution: proposed fixa fix for the issue has been proposed and waits for confirmationa fix for the issue has been proposed and waits for confirmation

state: waiting for PR

Status: Open.

#4972 In nlohmann/json;

· sakuntalle opened on Oct 29, 2025