markRead: negative count still occurs when reading compacted topic from start #1393

panic: markRead: negative count

goroutine 68 [running]:
github.com/segmentio/kafka-go.(*messageSetReader).markRead(0xc0004587a0)
    external/com_github_segmentio_kafka_go/message_reader.go:345 +0x11a
github.com/segmentio/kafka-go.(*messageSetReader).readMessageV2(0xc0004587a0, 0x2c709, 0xc000507ac8, 0xc000507ab8, 0x2c708, 0x2c708, 0xc000059800, 0xc0005078f8, 0x416b3b, 0xc0005078f8, ...)
    external/com_github_segmentio_kafka_go/message_reader.go:329 +0x49d
github.com/segmentio/kafka-go.(*messageSetReader).readMessage(0xc0004587a0, 0x2c709, 0xc000507ac8, 0xc000507ab8, 0x2c708, 0xc000507a5c, 0x17fd1b29700, 0x0, 0xc0004922a0, 0x0, ...)
    external/com_github_segmentio_kafka_go/message_reader.go:136 +0xc5
github.com/segmentio/kafka-go.(*Batch).readMessage(0xc000195880, 0xc000507ac8, 0xc000507ab8, 0x0, 0x17fd1b29700, 0x100000001, 0xc0004922a0, 0xc0004922a0, 0xc000507ab8, 0x2)
    external/com_github_segmentio_kafka_go/batch.go:240 +0x79
github.com/segmentio/kafka-go.(*Batch).ReadMessage(0xc000195880, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
    external/com_github_segmentio_kafka_go/batch.go:192 +0x11a
github.com/segmentio/kafka-go.(*reader).read(0xc000507ed8, 0xe30160, 0xc0004882c0, 0x2c709, 0xc0000e21e0, 0x0, 0x0, 0x0)
    external/com_github_segmentio_kafka_go/reader.go:1492 +0x3ec
github.com/segmentio/kafka-go.(*reader).run(0xc000507ed8, 0xe30160, 0xc0004882c0, 0x0)
    external/com_github_segmentio_kafka_go/reader.go:1310 +0x2d9
github.com/segmentio/kafka-go.(*Reader).start.func1(0xc0004d8000, 0xe30160, 0xc0004882c0, 0xc00004402c, 0x10, 0x0, 0xfffffffffffffffe, 0xc0004d8138)
    external/com_github_segmentio_kafka_go/reader.go:1211 +0x1d8
created by github.com/segmentio/kafka-go.(*Reader).start
    external/com_github_segmentio_kafka_go/reader.go:1191 +0x1a5