Remove dead code in 64-bit overflow protection - #5371
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__CFBitfield64SetValue call operated on newInfo from a previous loop iteration (or uninitialized on first iteration), not the current info. Plus, newInfo = info + RC_INCREMENT; was executed unconditionally after the overflow check, overwriting any value set by __CFBitfield64SetValue.
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Swap into place if overflow doesn't happen.
__CFBitfield64SetValue call operated on newInfo from a previous loop iteration (or uninitialized on first iteration), not the current info.
Plus, newInfo = info + RC_INCREMENT; was executed unconditionally after the overflow check, overwriting any value set by __CFBitfield64SetValue.