Script_sig for coinbase transaction afbff1130b6fcbdceebbadfc48a842af1f03ee08a79e042b37fc467518b49a0f
Scripts are not parsed. From the protocol perspective they are byte arrays, and their contents is irrelevant for transaction deserialization.

Scripts are executed however, at the time they participate in spending. For outputs, that is when they are (attempted to be) spent. For non-coinbase inputs, that is immediately. Coinbases never participate in spending, so for almost(*) all purposes, they are just byte arrays.

(*) There are two partial exceptions to this. BIP34 requires the coinbase to start with a push of the block height. The 80000 vsigops limit also counts CHECKSIG operations in coinbases (treating them as scripts, but it stops counting at the first invalid opcode).