Crash when dumper a 24 bit float number

[freedomDR]

env: Ubuntu 24.04 LTS
version: latest
Reproduce code

 Builder bb;
 bb.add(Value(ValueType::Object));
 bb.add("double", Value(-121533977414633621234567.0f));
 bb.close();
 std::cout << bb.slice().toJson() << std::endl;

this code will product stack smashing detected. I guess reason is this code

[freedomDR]

Maybe judge shoud is K >= 0 && (exp < (ndigits + 7 - neg))