The C library occasionally crashes when simpleble_peripheral_manufacturer_data_get is called

[KlemenDEV]

I am in the process of making Java bindings for the library using JNA via SimpleBLE C API.

I have implemented quite some parts of it already, but I am facing a problem where the library crashes (JVM) when simpleble_peripheral_manufacturer_data_get is called. This does not happen every time a new device is found, but only after a few detections usually.

The implementation follows https://github.com/OpenBluetoothToolbox/SimpleBLE/blob/main/examples/simpleble/c/scan.c

Such a problem is not observed when obtaining services via simpleble_peripheral_services_get with the same mechanism except, of course, a different method and structure type.

I did not figure out how to get stack trace or core dump when calling via JNA yet so I don't have more details on the crash, but they happen when the peripheral has manufacturer data (simpleble_peripheral_manufacturer_data_count > 0) and then simpleble_peripheral_manufacturer_data_get is called.

I have also observed I get different numbers of data for simpleble_peripheral_manufacturer_data_count for the same peripheral where the peripheral is sending the same number of manufacturer data entries in the BLE ADV.

Testing on Windows 11

[KlemenDEV]

It also seems that calling simpleble_peripheral_manufacturer_data_get, structure sometimes gets the data array filled with non-zero values, while the data_length is set to 0

[KlemenDEV]

Checking value of the manufacturer_data, there sometimes can be found short sequences of correct data, but not full chunks

Missing advertisements could be similar to #218, however same BLE adapter always reads all manufacturer data when testing with eg. Bleak Python library