Search results

Mixed comparison bug: number_unsigned (INT64_MAX+1~UINT64_MAX) vs number_integer

kind: bug

Status: Open.

#5210 In nlohmann/json;

· ljcjclljc opened on Jun 17, 2026

TOCTOU race between lexer construction and locale changes causes float truncation

kind: bug

Status: Open.

#5198 In nlohmann/json;

· jgreitemann opened on May 30, 2026

basic_json destructor allocates memory, violating noexcept semantics

kind: bug

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

Status: Open.

#5135 In nlohmann/json;

· EvanBalster opened on Apr 13, 2026

MSVC: unexpected behaviour converting from json to a rvalue reference of a variant containing a type that can be constructed from a string

kind: bug

Status: Open.

#5066 In nlohmann/json;

· karcherm opened on Jan 30, 2026

Constructing array from C++20 ranges view does not work

kind: bug

Status: Open.

#4916 In nlohmann/json;

· stevenwdv opened on Sep 11, 2025

C++17 std::optional feature not enabled

kind: bug

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

Status: Open.

#4864 In nlohmann/json;

· Stevan1996 opened on Jul 28, 2025

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

kind: bug

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

Status: Open.

#4825 In nlohmann/json;

· B-N-O opened on Jun 18, 2025

·

Release 3.12.1

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

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

kind: bug

Status: Open.

#4714 In nlohmann/json;

· nebkat opened on Apr 1, 2025

Cannot use std::format on nholman::json objects

kind: bug

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

Status: Open.

#4261 In nlohmann/json;

· AA1999 opened on Jan 4, 2024

·

Release 3.12.1

warning on at(nlohmann::json_pointer)

kind: bug

kind: enhancement/improvement

Status: Open.

#4103 In nlohmann/json;

· manifolds opened on Aug 9, 2023

NLOHMANN_DEFINE_TYPE_* fails with zero members

confirmed

good first issue

kind: bug

Status: Open.

#4041 In nlohmann/json;

· dawinaj opened on May 23, 2023

error: expected initializer before ‘<’ token

kind: bug

Status: Open.

#3907 In nlohmann/json;

· pipelinedestroyer opened on Jan 4, 2023