Does OP_INVALIDOPCODE always cause script to return false?

[uminatsu]

Normally OP_INVALIDOPCODE would cause script evaluation to return false, but what if it is inside the scope of a pair of OP_IF .... OP_ENDIF?

Take a look at this tx:

77822fd6663c665104119cb7635352756dfc50da76a92d417ec1a12c518fad69

scriptPubKey is

OP_IF OP_INVALIDOPCODE 4effffffff 46726f6d.... OP_ENDIF

It seems that a scriptSig of the following will be accepted to memory pool, but will it still fail to verify?

OP_1 OP_0

[apxu]

Seems to me that the "problem" is in this

Code:

            if (vchPushValue.size() > MAX_SCRIPT_ELEMENT_SIZE)
                return false;

This check performs in both branches if/else

So, it is unspendable output ( this "Message from Satoshi" was discussed widely )