inklecate stack overflow - Knot and variable with same name

`inklecate -p` crashes on the following script

```
~temp scene = 0

->Start(scene)

===Start(ref scene)
~scene++
SCENE {scene}
-> END
```

```
Stack overflow.
at System.String.GetNonRandomizedHashCode()
at System.Collections.Generic.NonRandomizedStringEqualityComparer+OrdinalComparer.GetHashCode(System.String)
at System.Collections.Generic.Dictionary`2[[System.__Canon, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].FindValue(System.__Canon)
at System.Collections.Generic.Dictionary`2[[System.__Canon, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].TryGetValue(System.__Canon, System.__Canon ByRef)
at Ink.Runtime.CallStack.GetTemporaryVariableWithName(System.String, Int32)
at Ink.Runtime.VariablesState.GetRawVariableWithName(System.String, Int32)
at Ink.Runtime.VariablesState.GetVariableWithName(System.String, Int32)
at Ink.Runtime.VariablesState.ValueAtVariablePointer(Ink.Runtime.VariablePointerValue)
at Ink.Runtime.VariablesState.GetVariableWithName(System.String, Int32)
at Ink.Runtime.VariablesState.ValueAtVariablePointer(Ink.Runtime.VariablePointerValue)

```

https://chromy.github.io/ink-proof/#!/result/6459?showEverything=true