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C++17 std::optional feature not enabled

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.

#4864 In nlohmann/json;

· Stevan1996 opened on Jul 28, 2025

json destructor does not use the provided allocator

kind: bug

Status: Open.

#4842 In nlohmann/json;

· veselink1 opened on Jul 4, 2025

merge json : arrays not appended?

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.

#4828 In nlohmann/json;

· jlmxyz opened on Jun 22, 2025

MSVC: warning C5260: for constexpr variables defined in to_chars.hpp

kind: bug

Status: Open.

#4826 In nlohmann/json;

· risa2000 opened on Jun 18, 2025

Template instantiation of nlohmann::basic_json<> fails on C++17

kind: bug

Status: Open.

#4825 In nlohmann/json;

· B-N-O opened on Jun 18, 2025

json::update() with merge_objects==true may trigger JSON_ASSERT for some objects

kind: bug

Status: Open.

#4813 In nlohmann/json;

· Vobraz opened on Jun 9, 2025

Allocator Propagation Issues with std::pmr in nlohmann::json: Limitations

kind: bug

Status: Open.

#4810 In nlohmann/json;

· ankitghevariya opened on Jun 5, 2025

Fix cppcheck 1.5.1 warning

confirmed

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.

#4755 In nlohmann/json;

· nlohmann opened on Apr 23, 2025

· 

Release 3.12.1

Binary formats invalid encoding for <discarded> values in arrays and objects

aspect: binary formatsBSON, CBOR, MessagePack, UBJSONBSON, CBOR, MessagePack, UBJSON

kind: bug

Status: Open.

#4714 In nlohmann/json;

· nebkat opened on Apr 1, 2025

nlohman::ordered_json using deprecated operators on calls to .value and .at with join_pointers

confirmed

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.

#4621 In nlohmann/json;

· jllansford opened on Jan 23, 2025

UTF-8 invalid characters are not always ignored when dumping with error_handler_t::ignore

confirmed

documentation

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.

#4552 In nlohmann/json;

· gentooise opened on Dec 17, 2024

NLOHMANN_DEFINE_TYPE_INTRUSIVE with nlohmann::json::json_pointer

kind: bug

state: stalethe issue has not been updated in a while and will be closed automatically soon unless it is updatedthe issue has not been updated in a while and will be closed automatically soon unless it is updated

Status: Open.

#4104 In nlohmann/json;

· risa2000 opened on Aug 11, 2023