github-vet / github-vet/rangeloop-pointer-findings

elodina/go-kafka: Godeps/_workspace/src/github.com/stealthly/go_kafka_client/fetcher.go; 13 LoC

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Description

Found a possible issue in [elodina/go-kafka](https://www.github.com/elodina/go-kafka) at [Godeps/_workspace/src/github.com/stealthly/go_kafka_client/fetcher.go](https://github.com/elodina/go-kafka/blob/c4b8a4c5fe85a73d0c827b1e115f45faff6cfd5a/Godeps/_workspace/src/github.com/stealthly/go_kafka_client/fetcher.go#L301-L313)

Below is the message reported by the analyzer for this snippet of code. Beware that the analyzer only reports the first issue it finds, so please do not limit your consideration to the contents of the below message.

>

[Click here to see the code in its original context.](https://github.com/elodina/go-kafka/blob/c4b8a4c5fe85a73d0c827b1e115f45faff6cfd5a/Godeps/_workspace/src/github.com/stealthly/go_kafka_client/fetcher.go#L301-L313)

Click here to show the 13 line(s) of Go which triggered the analyzer.

```go
for topicAndPartition, offset := range partitionAndOffsets {
if _, contains := f.partitionMap[topicAndPartition]; !contains {
validOffset := offset + 1
if isOffsetInvalid(offset) {
f.handleOffsetOutOfRange(&topicAndPartition)
} else {
f.partitionMap[topicAndPartition] = validOffset
}
f.manager.partitionMap[topicAndPartition].Buffer.start(f.askNext)
newPartitions[topicAndPartition] = f.askNext
Debugf(f, "Owner of %s", topicAndPartition)
}
}

```

Click here to show extra information the analyzer produced.

```
No path was found through the callgraph that could lead to a function which writes a pointer argument.

No path was found through the callgraph that could lead to a function which passes a pointer to third-party code.

root signature {handleOffsetOutOfRange 1} was not found in the callgraph; reference was passed directly to third-party code
```

Leave a reaction on this issue to contribute to the project by classifying this instance as a **Bug** :-1:, **Mitigated** :+1:, or **Desirable Behavior** :rocket:
See the descriptions of the classifications [here](https://github.com/github-vet/rangeclosure-findings#how-can-i-help) for more information.

commit ID: c4b8a4c5fe85a73d0c827b1e115f45faff6cfd5a

Contributor guide

No contributing guide indexed for this repository

Research direction

Start with Godeps/_workspace/src/github.com/stealthly/go_kafka_client/fetcher.go around lines 301-313, then inspect handleOffsetOutOfRange and the analyzer details in this issue. Determine whether the reported range-loop behavior is a bug, mitigated, or desirable behavior, and leave the corresponding reaction as the completed classification.

Written by the indexing model from the issue text.

Assessment

Tech stack
go
Domain
distributed-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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