async producer panic: slice bounds out of range

[danmia]

Versions

Sarama Version: cebb584
Kafka Version: 2.0.0
Go Version: 1.11

Configuration

What configuration values are you using for Sarama and Kafka?
Producer.Return.Errors = true
Producer.Return.Successes = true
Producer.RequiredAcks = sarama.WaitForLocal
ClientID = "prod"
Version = sarama.V2_0_0_0

Logs

I don't see any logs

Problem Description

I see a panic. I haven't been able to reproduce this reliably. Perhaps related to 1225 ?

Dec  5 08:09:52  : panic: runtime error: slice bounds out of range
Dec  5 08:09:52  : goroutine 220 [running]:
Dec  5 08:09:52  : github.com/Shopify/sarama.(*realEncoder).putVarint(0xc0299a2af0, 0x9)
Dec  5 08:09:52  : /go/src/github.com/Shopify/sarama/real_encoder.go:39 +0x8a
Dec  5 08:09:52  : github.com/Shopify/sarama.(*realEncoder).putVarintBytes(0xc0299a2af0, 0xc00793a5e0, 0x9, 0x10, 0x0, 0x0)
Dec  5 08:09:52  : /go/src/github.com/Shopify/sarama/real_encoder.go:77 +0x47
Dec  5 08:09:52  : github.com/Shopify/sarama.(*RecordHeader).encode(0xc0004523c0, 0x1245bc0, 0xc0299a2af0, 0x500, 0x0)
Dec  5 08:09:52  : /go/src/github.com/Shopify/sarama/record.go:22 +0xb1
Dec  5 08:09:52  : github.com/Shopify/sarama.(*Record).encode(0xc024ca1dc0, 0x1245bc0, 0xc0299a2af0, 0x0, 0x0)
Dec  5 08:09:52  : /go/src/github.com/Shopify/sarama/record.go:61 +0x1e5
Dec  5 08:09:52  : github.com/Shopify/sarama.recordsArray.encode(0xc002b7f240, 0x8, 0x8, 0x1245bc0, 0xc0299a2af0, 0x1, 0xc003688a80)
Dec  5 08:09:52  : /go/src/github.com/Shopify/sarama/record_batch.go:20 +0x63
Dec  5 08:09:52  : github.com/Shopify/sarama.encode(0x122d180, 0xc001767da0, 0x0, 0x0, 0xc00793f120, 0x10, 0x444ad1, 0xc025a41b40, 0xc001767d80)
Dec  5 08:09:52  : /go/src/github.com/Shopify/sarama/encoder_decoder.go:35 +0x233
Dec  5 08:09:52  : github.com/Shopify/sarama.(*RecordBatch).encodeRecords(0xc002b56dc0, 0x1245b00, 0xc001767d60, 0x0, 0x0)
Dec  5 08:09:52  : /go/src/github.com/Shopify/sarama/record_batch.go:217 +0xd8
Dec  5 08:09:52  : github.com/Shopify/sarama.(*RecordBatch).encode(0xc002b56dc0, 0x1245b00, 0xc001767d60, 0x1, 0x1)
Dec  5 08:09:52  : /go/src/github.com/Shopify/sarama/record_batch.go:87 +0x36f
Dec  5 08:09:52  : github.com/Shopify/sarama.(*Records).encode(0xc007223b30, 0x1245b00, 0xc001767d60, 0x0, 0x0)
Dec  5 08:09:52  : /go/src/github.com/Shopify/sarama/records.go:63 +0xbb
Dec  5 08:09:52  : github.com/Shopify/sarama.(*ProduceRequest).encode(0xc001767d20, 0x1245b00, 0xc001767d60, 0x0, 0x0)
Dec  5 08:09:52  : /go/src/github.com/Shopify/sarama/produce_request.go:106 +0x2b7
Dec  5 08:09:52  : github.com/Shopify/sarama.(*request).encode(0xc008364330, 0x1245b00, 0xc001767d60, 0x40da4f, 0xc033b469c0)
Dec  5 08:09:52  : /go/src/github.com/Shopify/sarama/request.go:32 +0x13c
Dec  5 08:09:52  : github.com/Shopify/sarama.encode(0x122bd80, 0xc008364330, 0x123f1c0, 0xc0004562c0, 0x0, 0xb, 0x0, 0x0, 0x40e201)
Dec  5 08:09:52  : /go/src/github.com/Shopify/sarama/encoder_decoder.go:24 +0x90
Dec  5 08:09:52  : github.com/Shopify/sarama.(*Broker).send(0xc0002eedc0, 0x123a500, 0xc001767d20, 0xc001767d01, 0x0, 0x0, 0x0)
Dec  5 08:09:52  : /go/src/github.com/Shopify/sarama/broker.go:581 +0x24e
Dec  5 08:09:52  : github.com/Shopify/sarama.(*Broker).sendAndReceive(0xc0002eedc0, 0x123a500, 0xc001767d20, 0x122bd00, 0xc001767d40, 0x3000106, 0x0)
Dec  5 08:09:52  : /go/src/github.com/Shopify/sarama/broker.go:612 +0x6a
Dec  5 08:09:52  : github.com/Shopify/sarama.(*Broker).Produce(0xc0002eedc0, 0xc001767d20, 0xc001767c01, 0x0, 0x0)
Dec  5 08:09:52  : /go/src/github.com/Shopify/sarama/broker.go:278 +0xe8
Dec  5 08:09:52  : github.com/Shopify/sarama.(*asyncProducer).newBrokerProducer.func1()
Dec  5 08:09:52  : /go/src/github.com/Shopify/sarama/async_producer.go:629 +0xb4
Dec  5 08:09:52  : github.com/Shopify/sarama.withRecover(0xc0017a88a0)
Dec  5 08:09:52  : /go/src/github.com/Shopify/sarama/utils.go:45 +0x43
Dec  5 08:09:52  : created by github.com/Shopify/sarama.(*asyncProducer).newBrokerProducer
Dec  5 08:09:52  : /go/src/github.com/Shopify/sarama/async_producer.go:625 +0x1f5

[d1egoaz]

seems related to #1225