[hinkley]

The first bug I remember writing was making native calls in Java to process data. I didn’t understand why in the examples they kept rerunning the handle dereference in every loop.

If native code calls back into Java, and the GC kicks in, all the objects the native code can see can be compacted and moved. So my implementation worked fine for all of the smaller test fixtures, and blew up half the time with the largest. Because I skipped a line to make it “go faster”.

I finally realized I was seeing raw Java objects in the middle of my “array” and changing the value of final fields into illegal pairings which blew everything the fuck up.