dillon1000/react

[test case] Failing assignment inside of nested if statement

``` 

function useBar(props) { 

let z; 

if (props.a) { 

if (props.b) { 

z = baz(); 

} 

} 

return z; 

} 

``` 

Currently fails with 

``` 

InvariantViolation: A phi cannot have two operands initialized before its 
declaration 

```