Prevent segfaults: defer closing until all operations are done #612
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Closes #32. Follow-up to #597.
I made sure to replicate a segfault (or a failed LevelDB assertion in the case of
get()
) for each operation before fixing it. That required repeating the tests a few thousand times with a forloop; I didn't keep that code because it would make CI runs too long. I wasn't able to replicate a segfault forapproximateSize()
but I'm confident enough in the basic mechanism to let that slide. Lastly,compactRange()
did not segfault either but it did hang, so that's fixed now too.