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

wolferton/quilt: ioc/container.go; 34 LoC

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Description

Found a possible issue in [wolferton/quilt](https://www.github.com/wolferton/quilt) at [ioc/container.go](https://github.com/wolferton/quilt/blob/c64e1ff700f2789f4c3802dbaaaef5bcf1368247/ioc/container.go#L263-L296)

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 proto used in defer or goroutine at line 282

[Click here to see the code in its original context.](https://github.com/wolferton/quilt/blob/c64e1ff700f2789f4c3802dbaaaef5bcf1368247/ioc/container.go#L263-L296)

Click here to show the 34 line(s) of Go which triggered the analyzer.

```go
for _, proto := range cc.protoComponents {

for fieldName, depName := range proto.Dependencies {

fl.LogTracef("%s needs %s", proto.Component.Name, depName)

requiredComponent := cc.allComponents[depName]

if requiredComponent == nil {
message := fmt.Sprintf("No component named %s available (required by %s.%s)", depName, proto.Component.Name, fieldName)
return errors.New(message)
}

requiredInstance := requiredComponent.Instance

targetReflect := reflect.ValueOf(proto.Component.Instance).Elem()

defer func() {
if r := recover(); r != nil {
fl.LogFatalf("Problem setting %s.%s: %s ", proto.Component.Name, fieldName, r)
}
}()

targetReflect.FieldByName(fieldName).Set(reflect.ValueOf(requiredInstance))
}

for fieldName, configPath := range proto.ConfigPromises {
fl.LogTracef("%s needs %s", proto.Component.Name, fieldName, configPath)

cc.configAccessor.SetField(fieldName, configPath, proto.Component.Instance)

}

}

```

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: c64e1ff700f2789f4c3802dbaaaef5bcf1368247

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