kkkbird/qapp: app.go; 35 LoC

Found a possible issue in [kkkbird/qapp](https://www.github.com/kkkbird/qapp) at [app.go](https://github.com/kkkbird/qapp/blob/509fb018ad18fa6659c7b985eec662e8a139872e/app.go#L267-L301)

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 i used in defer or goroutine at line 271

[Click here to see the code in its original context.](https://github.com/kkkbird/qapp/blob/509fb018ad18fa6659c7b985eec662e8a139872e/app.go#L267-L301)

Click here to show the 35 line(s) of Go which triggered the analyzer.

```go
for i, s := range a.initStages {
cErr := make(chan error, 1)

go func() {
log.Infof("Init stage %d-%s", i, s.name)
a.initedStageIdx = i
cErr <- s.Run(ctx, a)
}()

select {
case err = <-cErr:
if err != nil {
panic("shoud not run to this line")
}
case err = <-a.initErrChan:
cancel()
if !strings.HasSuffix(err.Error(), ErrShowVersion.Error()) {
log.WithError(err).Errorf("!!Init err, exit in 1s")
}
select { // wait the init stage done or cleanTimeout duration
case <-cErr:
case <-time.After(time.Second):
}

return err
case <-ctx.Done():
log.Errorf("!!Init timeount, exit in 1s")
select { // wait the init stage done or cleanTimeout duration
case <-cErr:
case <-time.After(time.Second):
}

return ctx.Err()
}
}

```

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See the descriptions of the classifications [here](https://github.com/github-vet/rangeclosure-findings#how-can-i-help) for more information.

commit ID: 509fb018ad18fa6659c7b985eec662e8a139872e