RCS1031: False positive when local variables share names

[eduherminio]

Product and Version Used:

Roslynator 2019 VS Extension, v3.2.0

Steps to Reproduce:

var key = "key_1";
var value = "false";

switch (key)
{
    case "key_1":
    {
        bool.TryParse(value, out var val);
        break;
    }
    case "key_2":
    {
        bool.TryParse(value, out var val);
        break;
    }
    // ...
}

Actual Behavior: RCS1031: Remove unnecessary braces. Applying the suggestion raises CS0136.

Expected Behavior: No warning raised, since the braces cannot be removed without producing the compiler error due to out var val used in both switch sections.