Assertion Failure: Invalid helperMethod in ChakraCore/lib/Backend/Lower.cpp::Lowerer::MapStFldHelper, line 7222

## Version
commit id: c3ead3f8a6e0bb8e32e043adc091c68cba5935e9

## Platform
Ubuntu 20.04.5 LTS (Linux 5.4.0-144-generic x86_64)

## Build
- Debug Mode

```
./build.sh --debug --static
```

## PoC
```
for (let i = 0; i < 400; i++) {
const obj = {};
obj["a"];
function f() {
eval("");
}
with (f) {
constructor = f;
}
obj["b"] = 1;
}
```

## Execution steps & Output
```
./ch --maxinterpretcount:10 --maxsimplejitruncount:100 -bgjit- poc.js
ASSERTION 389496: (/home/wjm/ChakraCore/lib/Backend/Lower.cpp, line 7222) false
Failure: (false)
Signal: SIGILL (Illegal instruction)
```
## Backtrace
```
(lldb) bt
* thread #1, name = 'ch', stop reason = signal SIGILL: illegal instruction operand
* frame #0: 0x00005555568c6e50 ch`Lowerer::MapStFldHelper(this=0x00007fffffff9720, propertySymOpnd=0x00007ff7e7c0d030, helperMethod=0x00007fffffff8004, polymorphicHelperMethod=0x00007fffffff8000) at Lower.cpp:7222:17
frame #1: 0x000055555688867b ch`Lowerer::LowerStFld(this=0x00007fffffff9720, stFldInstr=0x00007ff7e7b9dcd0, helperMethod=HelperOp_InitConstFld, polymorphicHelperMethod=HelperOp_InitConstFld, withInlineCache=false, labelBailOut=0x0000000000000000, isHelper=false, withPutFlags=false, flags=PropertyOperation_None) at Lower.cpp:7102:13
frame #2: 0x0000555556886602 ch`Lowerer::LowerRange(this=0x00007fffffff9720, instrStart=0x00007ff7e7c0b180, instrEnd=0x00007ff7e7c0b1e0, defaultDoFastPath=true, defaultDoLoopFastPath=true) at Lower.cpp:2543:13
frame #3: 0x000055555687bfd1 ch`Lowerer::Lower(this=0x00007fffffff9720) at Lower.cpp:105:11
frame #4: 0x0000555556b2636b ch`Func::TryCodegen(this=0x00007fffffff9f10) at Func.cpp:475:17
frame #5: 0x0000555556b25ae0 ch`Func::Codegen(alloc=0x00007fffffffa4d0, workItem=0x00007ff7e7bf7030, threadContextInfo=0x0000555557eb7188, scriptContextInfo=0x0000555557ee9108, outputData=0x00007fffffffa910, epInfo=0x00007ff7e7c64180, runtimeInfo=0x0000000000000000, polymorphicInlineCacheInfo=0x00007ff7e7bb7e00, codeGenAllocators=0x0000555557ef9eb8, codeGenProfiler=0x0000000000000000, isBackgroundJIT=false) at Func.cpp:325:18
frame #6: 0x000055555690ef90 ch`NativeCodeGenerator::CodeGen(this=0x0000555557eea8d8, pageAllocator=0x0000555557eb7510, workItemData=0x0000555557ef9db0, jitWriteData=0x00007fffffffa910, foreground=true, epInfo=0x00007ff7e7c64180) at NativeCodeGenerator.cpp:890:9
frame #7: 0x0000555556910c28 ch`NativeCodeGenerator::CodeGen(this=0x0000555557eea8d8, pageAllocator=0x0000555557eb7510, workItem=0x0000555557ef9d88, foreground=true) at NativeCodeGenerator.cpp:1007:5
frame #8: 0x00005555569139a7 ch`NativeCodeGenerator::Process(this=0x0000555557eea8d8, job=0x0000555557ef9d90, threadData=0x0000000000000000) at NativeCodeGenerator.cpp:1895:13
frame #9: 0x00005555569b83d4 ch`JsUtil::ForegroundJobProcessor::Process(job=0x0000555557ef9d90) at Jobs.cpp:426:36
frame #10: 0x0000555556922bc3 ch`void JsUtil::ForegroundJobProcessor::PrioritizeJobAndWait(this=0x0000555557ea2ce8, manager=0x0000555557eea8d8, holder=0x00007ff7e7c64180, function=0x0000000000000000) at Jobs.inl:207:36
frame #11: 0x0000555556918804 ch`void JsUtil::JobProcessor::PrioritizeJobAndWait(this=0x0000555557ea2ce8, manager=0x0000555557eea8d8, holder=0x00007ff7e7c64180, function=0x0000000000000000) at Jobs.inl:81:58
frame #12: 0x000055555690d4fc ch`NativeCodeGenerator::GenerateLoopBody(this=0x0000555557eea8d8, fn=0x00007ff7e7c47000, loopHeader=0x00007ff7e7c71e70, entryPoint=0x00007ff7e7c64180, localCount=15, localSlots=0x00007fffffffc150) at NativeCodeGenerator.cpp:711:22
frame #13: 0x00005555568157dd ch`GenerateLoopBody(nativeCodeGen=0x0000555557eea8d8, fn=0x00007ff7e7c47000, loopHeader=0x00007ff7e7c71e70, info=0x00007ff7e7c64180, localCount=15, localSlots=0x00007fffffffc150) at BackendApi.cpp:88:20
frame #14: 0x0000555555fb220b ch`Js::InterpreterStackFrame::DoLoopBodyStart(this=0x00007fffffffbff0, loopNumber=0, layoutSize=SmallLayout, doProfileLoopCheck=false, isFirstIteration=false) at InterpreterStackFrame.cpp:6277:17
frame #15: 0x0000555555fb57ee ch`void Js::InterpreterStackFrame::ProfiledLoopBodyStart(this=0x00007fffffffbff0, loopNumber=0, layoutSize=SmallLayout, isFirstIteration=false) at InterpreterStackFrame.cpp:5930:41
frame #16: 0x0000555555ff8a0a ch`unsigned char const* Js::InterpreterStackFrame::OP_ProfiledLoopBodyStart<(Js::LayoutSize)0, true>(this=0x00007fffffffbff0, loopId=0) at InterpreterStackFrame.cpp:5902:9
frame #17: 0x0000555555fc6a96 ch`unsigned char const* Js::InterpreterStackFrame::OP_ProfiledLoopBodyStart<(Js::LayoutSize)0, true>(this=0x00007fffffffbff0, ip="\U000000017\U00000001") at InterpreterStackFrame.cpp:5774:16
frame #18: 0x0000555555eaae91 ch`Js::InterpreterStackFrame::ProcessProfiled(this=0x00007fffffffbff0) at InterpreterHandler.inl:52:3
frame #19: 0x0000555555e525de ch`Js::InterpreterStackFrame::Process(this=0x00007fffffffbff0) at InterpreterStackFrame.cpp:3520:22
frame #20: 0x0000555555e50dd3 ch`Js::InterpreterStackFrame::InterpreterHelper(function=0x00007ff7e7c76780, args=ArgumentReader @ 0x00007fffffffc530, returnAddress=0x00007ff7e7bd0fa2, addressOfReturnAddress=0x00007fffffffc578, asmJsReturn=0x0000000000000000) at InterpreterStackFrame.cpp:2153:40
frame #21: 0x0000555555e4feb0 ch`Js::InterpreterStackFrame::InterpreterThunk(layout=0x00007fffffffc590) at InterpreterStackFrame.cpp:1833:16
frame #22: 0x00007ff7e7bd0fa2
frame #23: 0x00005555564a37de ch`amd64_CallFunction at JavascriptFunctionA.S:100
frame #24: 0x00005555561d7a4b ch`void* Js::JavascriptFunction::CallFunction(function=0x00007ff7e7c76780, entryPoint=(ch`NativeCodeGenerator::CheckCodeGenThunk(Js::RecyclableObject*, Js::CallInfo, ...)), args=Arguments @ 0x00007fffffffc798, useLargeArgCount=false)(Js::RecyclableObject*, Js::CallInfo, ...), Js::Arguments, bool) at JavascriptFunction.cpp:1364:16
frame #25: 0x00005555561cf2f4 ch`Js::JavascriptFunction::CallRootFunctionInternal(obj=0x00007ff7e7c76780, args=Arguments @ 0x00007fffffffc810, scriptContext=0x0000555557ee9108, inScript=true) at JavascriptFunction.cpp:772:24
frame #26: 0x00005555561cf10c ch`Js::JavascriptFunction::CallRootFunction(obj=0x00007ff7e7c76780, args=, scriptContext=0x0000555557ee9108, inScript=true) at JavascriptFunction.cpp:717:15
frame #27: 0x00005555561cf0b1 ch`Js::JavascriptFunction::CallRootFunction(this=0x00007ff7e7c76780, args=, scriptContext=0x0000555557ee9108, inScript=true) at JavascriptFunction.cpp:832:16
frame #28: 0x0000555555894a8e ch`RunScriptCore(this=0x00007fffffffcbe0, scriptContext=0x0000555557ee9108, _actionEntryPopper=0x00007fffffffcbc0)::$_85::operator()(Js::ScriptContext*, TTD::TTDJsRTActionResultAutoRecorder&) const at Jsrt.cpp:3705:49
frame #29: 0x0000555555894624 ch`_JsErrorCode ContextAPIWrapper(this=0x00007fffffffcb78, scriptContext=0x0000555557ee9108)::$_85)::'lambda'(Js::ScriptContext*)::operator()(Js::ScriptContext*) const at JsrtInternal.h:237:16
frame #30: 0x0000555555893fc4 ch`_JsErrorCode ContextAPIWrapper_Core(RunScriptCore(void*, unsigned char const*, unsigned long, LoadScriptFlag, unsigned long, char16_t const*, bool, _JsParseScriptAttributes, bool, void**)::$_85)::'lambda'(Js::ScriptContext*)>(fn=(anonymous class) @ 0x00007fffffffcb78)::$_85) at JsrtInternal.h:192:23
frame #31: 0x00005555558608f6 ch`_JsErrorCode ContextAPIWrapper(fn=(anonymous class) @ 0x00007fffffffcbe0)::$_85) at JsrtInternal.h:235:27
frame #32: 0x00005555558607fb ch`RunScriptCore(scriptSource=0x00007ff7e7c44000, script="for (let i = 0; i < 400; i++) {\n const obj = {};\n obj[\"a\"];\n function f() {\n eval(\"\"); \n }\n with (f) {\n constructor = f;\n }\n obj[\"b\"] = 1;\n}\n// CRASH INFO\n// ==========\n// TERMSIG: 4\n// STDERR:\n// ASSERTION 824955: (/home/wjm/ChakraCore/lib/Backend/Lower.cpp, line 7222) false\n// Failure: (false)\n// STDOUT:\n// [COV] edge counters initialized. Shared memory: shm_id_2712790_3 with 515228 edges\n// ARGS: /home/wjm/ChakraCore/out/Debug/ch --maxinterpretcount:10 --maxsimplejitruncount:100 -bgjit- -reprl fuzzcode.js\n// EXECUTION TIME: 127 ms\n\n\n/*\n\nTitle: Assertion Failure: Invalid helperMethod in ChakraCore/lib/Backend/Lower.cpp::Lowerer::MapStFldHelper, line 7222\n\n## Version\ncommit id: c3ead3f8a6e0bb8e32e043adc091c68cba5935e9\n\n## Platform\nUbuntu 20.04.5 LTS (Linux 5.4.0-144-generic x86_64)\n\n## Build\n- Debug Mode\n\n```\n./build.sh --debug --static\n```\n\n## PoC\n```\nfor (let i = 0; i < 400; i++) {\n const obj = {};\n obj[\"a\"];\n function f() {\n eval(\"\"); \n }\n with (f)"..., cb=1350, loadScriptFlag=LoadScriptFlag_Utf8Source | LoadScriptFlag_ExternalArrayBuffer, sourceContext=0, sourceUrl=u"/home/wjm/DiTing-pocs/chakra/bug16_lowerFalse.js", parseOnly=false, parseAttributes=JsParseScriptAttributeNone, isSourceModule=false, result=0x0000000000000000) at Jsrt.cpp:3656:12
frame #33: 0x0000555555862f6e ch`::JsRun(JsValueRef, JsSourceContext, JsValueRef, JsParseScriptAttributes, JsValueRef *) [inlined] CompileRun(scriptVal=0x00007ff7e7c44000, sourceContext=0, sourceUrl=0x00007ff7e7c71cf0, parseAttributes=JsParseScriptAttributeNone, result=0x0000000000000000, parseOnly=false) at Jsrt.cpp:5019:12
frame #34: 0x0000555555862db9 ch`::JsRun(scriptVal=0x00007ff7e7c44000, sourceContext=0, sourceUrl=0x00007ff7e7c71cf0, parseAttributes=JsParseScriptAttributeNone, result=0x0000000000000000) at Jsrt.cpp:5041
frame #35: 0x0000555555787293 ch`ChakraRTInterface::JsRun(script=0x00007ff7e7c44000, sourceContext=0, sourceUrl=0x00007ff7e7c71cf0, parseAttributes=JsParseScriptAttributeNone, result=0x0000000000000000) at ChakraRtInterface.h:487:179
frame #36: 0x0000555555784924 ch`RunScript(fileName="bug16_lowerFalse.js", fileContents="for (let i = 0; i < 400; i++) {\n const obj = {};\n obj[\"a\"];\n function f() {\n eval(\"\"); \n }\n with (f) {\n constructor = f;\n }\n obj[\"b\"] = 1;\n}\n// CRASH INFO\n// ==========\n// TERMSIG: 4\n// STDERR:\n// ASSERTION 824955: (/home/wjm/ChakraCore/lib/Backend/Lower.cpp, line 7222) false\n// Failure: (false)\n// STDOUT:\n// [COV] edge counters initialized. Shared memory: shm_id_2712790_3 with 515228 edges\n// ARGS: /home/wjm/ChakraCore/out/Debug/ch --maxinterpretcount:10 --maxsimplejitruncount:100 -bgjit- -reprl fuzzcode.js\n// EXECUTION TIME: 127 ms\n\n\n/*\n\nTitle: Assertion Failure: Invalid helperMethod in ChakraCore/lib/Backend/Lower.cpp::Lowerer::MapStFldHelper, line 7222\n\n## Version\ncommit id: c3ead3f8a6e0bb8e32e043adc091c68cba5935e9\n\n## Platform\nUbuntu 20.04.5 LTS (Linux 5.4.0-144-generic x86_64)\n\n## Build\n- Debug Mode\n\n```\n./build.sh --debug --static\n```\n\n## PoC\n```\nfor (let i = 0; i < 400; i++) {\n const obj = {};\n obj[\"a\"];\n function f() {\n eval(\"\"); \n }\n with (f)"..., fileLength=1350, fileContentsFinalizeCallback=(ch`WScriptJsrt::FinalizeFree(void*) at WScriptJsrt.cpp:217), bufferValue=0x0000000000000000, fullPath="/home/wjm/DiTing-pocs/chakra/bug16_lowerFalse.js", parserStateCache=0x0000000000000000)(void*), void*, char*, void*) at ch.cpp:451:25
frame #37: 0x00005555557863f0 ch`ExecuteTest(fileName="bug16_lowerFalse.js") at ch.cpp:917:13
frame #38: 0x00005555557864ac ch`ExecuteTestWithMemoryCheck(fileName="bug16_lowerFalse.js") at ch.cpp:967:10
frame #39: 0x0000555555786d7a ch`main(argc=5, c_argv=0x00007fffffffd648) at ch.cpp:1274:20
frame #40: 0x00007ffff778d1e2 libc.so.6`__libc_start_main + 242
frame #41: 0x0000555555783b7e ch`_start + 46
```