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kotlinlang

Hi, anyone have trouble access MutableMap in kotlin?
I have something defined in kotlin like this
```abstract class KotlinClass() {
    val info: MutableMap&lt;String, Any&gt; = mutableMapOf()
}```
then in swift class I have something like this
```public class SwiftClass: KotlinClass {
    ...
}

var myClass = SwiftClass()
<http://myClass.info[%22key%22]|myClass.info["key"]> = value```
In some other places if I try to access it like this way
```if let mValue = <http://myClass.info[%22key%22]|myClass.info["key"]> {
...
}```
I’ll get a address bad access crash sometimes, it’s not happening every time but from time to time