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the first 32 bytes of a bytes variable is its length (instead of `address`) avoid using msize() to make optimizer happy. > SyntaxError: The msize instruction cannot be used when the Yul optimizer is activated because it can change its semantics. Either disable the Yul optimizer or do not use the instruction.
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the first 32 bytes of a bytes variable is its length (instead of
address)avoid using msize() to make optimizer happy.