Assertion Error (ByteCode Updward Exposed Used Mismatch)

Assert Error in ChakraCore/lib/Backend/BackwardPass.cpp (line 8838)

this is PoC code.
```
function test0() {
var __es_v0 = RegExp.prototype.exec.call(/(baa){3,4}/, String.prototype.toString.call("c2"));
var func2 = function () {
test0();
};
var c = 2147483647;
while (func2.call(c++, c++)) {}
}
test0();
```

ChakraCore: Latest, Debug build
OS: Ubuntu 18.04.2
Arch: x86_64