Server crashes with large number of .pk3 files

[UncannyFish]

When I try to launch JK2MV server with 1141 .pk3 files in base folder, it crashes with error *** buffer overflow detected *** I've compiled JK2MV https://github.com/mvdevs/jk2mv/commit/3bdba645b413166594c561c06f3d932825716792 and MVSDK https://github.com/mvdevs/mvsdk/commit/1e3dd0b4ea9411951ce8bb76a68f7b81a4b46854 on Ubuntu 20.04 64 bit using GCC 9.4.0 crashlog-2022-06-05_06-41-08.txt

It looks like some limit around 1024, because it works with 1009 files. But I can't find it.