Hello, I found a case of crash, if NewArray in GetSpareOrNewBlock returns a 
contiguous address.
 If consecutive calls to HandleScope::Extend result in the first call's 
limit being exactly equal to the second call's block_start, then during 
HandleScope::DeleteExtensions, it will incorrectly judge that it is in a 
SealedHandleScope, leading to subsequent out-of-bounds access.  

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