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Hitting assert in NibbleMapDeleteUnlocked #109970

@kunalspathak

Description

@kunalspathak

Introduced in #108939


Assert failure(PID 21700 [0x000054c4], Thread: 47520 [0xb9a0]): ((*pMap) & ~mask) && !IsPointer(*pMap)

CORECLR! EEJitManager::NibbleMapDeleteUnlocked + 0x158 (0x00007ff9`161db138)
CORECLR! EEJitManager::RemoveJitData + 0x1AA (0x00007ff9`161dc9ea)
CORECLR! CEEJitInfo::BackoutJitData + 0xD9 (0x00007ff9`15a60109)
CORECLR! invokeCompileMethod + 0x195 (0x00007ff9`15a99d95)
CORECLR! UnsafeJitFunction + 0x83C (0x00007ff9`15a6e08c)
CORECLR! MethodDesc::JitCompileCodeLocked + 0x1D2 (0x00007ff9`15b45882)
CORECLR! MethodDesc::JitCompileCodeLockedEventWrapper + 0x50D (0x00007ff9`15b4610d)
CORECLR! MethodDesc::JitCompileCode + 0x5AB (0x00007ff9`15b455ab)
CORECLR! MethodDesc::PrepareILBasedCode + 0x50C (0x00007ff9`15b47f4c)
CORECLR! MethodDesc::PrepareCode + 0xF3 (0x00007ff9`15b479e3)
    File: Q:\git\runtime2\src\coreclr\vm\codeman.cpp:4148
    Image: q:\git\runtime2\artifacts\tests\coreclr\windows.x64.Checked\tests\Core_Root\corerun.exe

It always repros with AltJit.

@steveisok @max-charlamb

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