Compilation error with JSON_DIAGNOSTICS enabled

[Evil-Spirit]

Description

When JSON_DIAGNOSTICS defined, the following compilation error appears:

execeptions.hpp:119 accumulate is not member of std

Reproduction steps

#define JSON_DIAGNOSTICS
#include "nlohmann/json.hpp"

Expected vs. actual results

No compilation error should be

Minimal code example

No response

Error messages

No response

Compiler and operating system

Windows MSVC

Library version

latest

Validation

• The bug also occurs if the latest version from the develop branch is used.
• I can successfully compile and run the unit tests.

[falbrechtskirchinger]

The include for std::accumulate is indeed missing. Fixed by #3719. Thanks.