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Add tryread!
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@ -63,7 +63,10 @@ function Base.iterate(iter::OverlapIterator, state)
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while state.chunkid ≤ lastindex(state.chunks)
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chunk = state.chunks[state.chunkid]
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while BGZFStreams.virtualoffset(iter.reader.stream) < chunk.stop
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read!(iter.reader, state.record)
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if BioGenerics.IO.tryread!(iter.reader, state.record) === nothing
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# no more overlapping records in this chunk since the end of the chunk was reached.
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break
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end
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c = compare_intervals(state.record, (state.refindex, iter.interval))
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if c == 0
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return copy(state.record), state
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