Transaction.from(buffer: ) always crash

[kk-vv]

func testTransactionDecode() {
    let swapTransaction = "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"
    
    let data = Data(base64Encoded: swapTransaction)
    assert(data != nil)
    let transaction = try! Transaction.from(buffer: data!)
    print(transaction)
}

[jonbalbarin]

Hello:

I’m encountering the same bug - what’s happening is there’s a Fatal error: Range requires lowerBound <= upperBound on this line, for an invalid range (zero to -1)

for j in 0...(instruction.accounts.count - 1) {

There’s an assumption in there that an instruction will have at least one account, and to my understanding this is not actually true. (In my case, I’m working with a transaction that has a “Compute Budget” instruction in it, that has no accounts)