Panic while shrinking replication topic

[Luzifer]

time="2017-09-26T11:01:05+02:00" level=info msg="closing connection and reconnecting"
time="2017-09-26T11:01:09+02:00" level=info msg="error while reconnecting:connect was asked to stop"
time="2017-09-26T11:01:09+02:00" level=info msg="connecting to ZooKeeper ensemble **masked**:2181,**masked**:2181,**masked**:2181"
time="2017-09-26T11:01:09+02:00" level=info msg="creating node /admin/delete_topics/broker-3-health-check"
time="2017-09-26T11:01:14+02:00" level=info msg="Shrinking replication check topic to exclude broker 3"
panic: runtime error: slice bounds out of range

goroutine 1 [running]:
github.com/andreas-schroeder/kafka-health-check/check.delAll(0xc42062e090, 0x4, 0x4, 0xc400000003, 0x1, 0x0, 0x0)
        /home/travis/gopath/src/github.com/andreas-schroeder/kafka-health-check/check/int32_slice.go:29 +0x162
github.com/andreas-schroeder/kafka-health-check/check.(*HealthCheck).deleteTopic(0xc4200ea000, 0x874360, 0xc42000e048, 0x0, 0x0, 0x72f414, 0x18, 0x0, 0x0, 0x0)
        /home/travis/gopath/src/github.com/andreas-schroeder/kafka-health-check/check/setup.go:304 +0x398
github.com/andreas-schroeder/kafka-health-check/check.(*HealthCheck).closeConnection(0xc4200ea000, 0x1)
        /home/travis/gopath/src/github.com/andreas-schroeder/kafka-health-check/check/setup.go:284 +0x261
github.com/andreas-schroeder/kafka-health-check/check.(*HealthCheck).CheckHealth(0xc4200ea000, 0xc420016540, 0xc4200165a0, 0xc420016360)
        /home/travis/gopath/src/github.com/andreas-schroeder/kafka-health-check/check/health_check.go:99 +0x941
main.main()
        /home/travis/gopath/src/github.com/andreas-schroeder/kafka-health-check/main.go:20 +0x150
time="2017-09-26T11:01:14+02:00" level=info msg="using topic broker-3-health-check for broker 3 health check"
time="2017-09-26T11:01:14+02:00" level=info msg="using topic broker-3-health-check for broker 3 replication check"
time="2017-09-26T11:01:19+02:00" level=info msg="found partition id 0 for broker 3 in topic \"broker-3-health-check\""
time="2017-09-26T11:01:19+02:00" level=info msg="found partition id 0 for broker 3 in topic \"broker-replication-check\""
time="2017-09-26T11:01:19+02:00" level=info msg="starting health check loop"