Non-verifying dump() alternative for debugging/logging needed

I have an embedded application using json.hpp v3.2.0 that mysteriously fails when stresstesting on a foreign lab-setup outside my PC. From the log I can see the reported error "Invalid UTF-8" error at index 1 : 0xF5" but nothing more.

I can not debug the software directly, so I would like to log the illegal json as a string or hex dump, so I can better diagnose the problem.

Would it be possible to provide a non-verifying dump() method, that could make a best effort to print out as much as possible of the json - even in the presence of such errors? With such a method I could inspect the output and use a process of elimination to better locate the part of the json that has a problem.

[nlohmann]

That means that the first or second byte is 0xF5 which is not valid in UTF-8.

With the latest release 3.4.0, it is possible to tell the dump function how to react on invalid Unicode, see the documentation, in particular the error handlers. There is also an example.

Great - that should work - thanks a lot !!