Reading beyond the trace limit yields strange exception

[Siebje]

Provided the total number of traces in a trace set is N:

Requesting trace N (correctly) yields the following exception:

java.lang.IllegalArgumentException: Requested trace index (N) is larger than the total number of available traces (N).
        at com.riscure.trs.TraceSet.get(TraceSet.java:135)

However, requesting trace N+1 yields the following exception:

java.lang.IllegalArgumentException: Negative size
        at java.base/sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:943)
        at com.riscure.trs.TraceSet.mapBuffer(TraceSet.java:96)
        at com.riscure.trs.TraceSet.moveBufferIfNecessary(TraceSet.java:108)
        at com.riscure.trs.TraceSet.get(TraceSet.java:129)