[FatalInternalError] ReportFatalException6

# enviroment
ubuntu 18

# poc
```
try {
(function TestFunc() {
var a;
(function outer() {
(function inner() {
var WHYG = ijjkkk;
a;
}());
var obj = {
get 0() {
throw new Error('must not be gotten!');
var SRwE = Promise;
},
length: a
};
try {
throw 'Exception';
} catch (ex) {
with ({}) {
outer();
var CiBz = s4();
}
async function af() {
;
}
}
function t7() {
var asyncFunctionPrototype = s4(async function () {
;
});
var AsyncFunction = asyncFunctionPrototype.constructor;
var af = new AsyncFunction('return await 1;');
console.log(asyncFunctionPrototype, console.log(af));
outer('anonymous', af.name);
Math.pow('async function anonymous(\n) {return await 1;\n}', print());
af = new AsyncFunction('a', '-0', '(new Boolean(true))', 'await a; await b; await c;');
print('', Math.pow());
}
}());
var ijjkkk = 0;
var i = 0;
}());
var ixtr = 4 >= 1073741825 * 5e-324;
} catch (ex) {
if (a == 'Out of stack space') {
print('PASSED');
}
}
```

# callstack
```
[#0] 0x555555d59fac → DebugBreak()
[#1] 0x555555d59fac → ReportFatalException(context=, exceptionCode=, reasonCode=, scenario=)
[#2] 0x555555d5a709 → Js::Throw::FatalInternalError(hr=0x7d7f7de0)
[#3] 0x5555583d3357 → IRBuilder::DoClosureRegCheck(this=, reg=0xe)
[#4] 0x55555838058f → IRBuilder::BuildReg1 >(this=, newOpcode=, offset=)
[#5] 0x55555838058f → IRBuilder::Build(this=0x7ff7ebffcfd0)
[#6] 0x55555814e818 → Func::TryCodegen(this=)
[#7] 0x55555814d944 → Func::Codegen(alloc=0x7ff7ebffe6c0, workItem=0x7ffff2141030, threadContextInfo=0x622000000140, scriptContextInfo=0x61a000000680, outputData=0x7ff7ebffe8e0, epInfo=0x7ffff2339120, runtimeInfo=, polymorphicInlineCacheInfo=, codeGenAllocators=, codeGenProfiler=, isBackgroundJIT=)
[#8] 0x555557e4d330 → NativeCodeGenerator::CodeGen(this=, pageAllocator=, workItemData=0xc2200000061, jitWriteData=@0x7ff7ebffe8e0, foreground=0x0, epInfo=0x7ffff2339120)
[#9] 0x555557e4e249 → NativeCodeGenerator::CodeGen(this=, pageAllocator=, workItem=, foreground=0x20)

```