minio/minio: cmd/global-heal.go; 54 LoC

Found a possible issue in [minio/minio](https://www.github.com/minio/minio) at [cmd/global-heal.go](https://github.com/minio/minio/blob/c19e6ce7732d738c7f5367dc65b6c201d4a19800/cmd/global-heal.go#L139-L192)

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.

> range-loop variable bucket used in defer or goroutine at line 157

[Click here to see the code in its original context.](https://github.com/minio/minio/blob/c19e6ce7732d738c7f5367dc65b6c201d4a19800/cmd/global-heal.go#L139-L192)

Click here to show the 54 line(s) of Go which triggered the analyzer.

```go
for _, bucket := range buckets {
// Heal current bucket
if err := bgSeq.queueHealTask(healSource{
bucket: bucket.Name,
}, madmin.HealItemBucket); err != nil {
if !isErrObjectNotFound(err) && !isErrVersionNotFound(err) {
logger.LogIf(ctx, err)
}
}

var entryChs []FileInfoVersionsCh
var mu sync.Mutex
var wg sync.WaitGroup
for _, disk := range disks {
disk := disk
wg.Add(1)
go func() {
defer wg.Done()
entryCh, err := disk.WalkVersions(ctx, bucket.Name, "", "", true, ctx.Done())
if err != nil {
// Disk walk returned error, ignore it.
return
}
mu.Lock()
entryChs = append(entryChs, FileInfoVersionsCh{
Ch: entryCh,
})
mu.Unlock()
}()
}
wg.Wait()

entriesValid := make([]bool, len(entryChs))
entries := make([]FileInfoVersions, len(entryChs))

for {
entry, _, ok := lexicallySortedEntryVersions(entryChs, entries, entriesValid)
if !ok {
break
}

for _, version := range entry.Versions {
if err := bgSeq.queueHealTask(healSource{
bucket: bucket.Name,
object: version.Name,
versionID: version.VersionID,
}, madmin.HealItemObject); err != nil {
if !isErrObjectNotFound(err) && !isErrVersionNotFound(err) {
logger.LogIf(ctx, err)
}
}
}
}
}

```

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: c19e6ce7732d738c7f5367dc65b6c201d4a19800