algorand/go-algorand: cmd/goal/clerk.go; 29 LoC

Found a possible issue in [algorand/go-algorand](https://www.github.com/algorand/go-algorand) at [cmd/goal/clerk.go](https://github.com/algorand/go-algorand/blob/c17ef9bc5dab5b98a9eb863b5c316aa06df69c27/cmd/goal/clerk.go#L1024-L1052)

Below is the message reported by the analyzer for this snippet of code. Beware that the analyzer only reports the first issue it finds, so please do not limit your consideration to the contents of the below message.

> reference to txn was used in a composite literal at line 1028

[Click here to see the code in its original context.](https://github.com/algorand/go-algorand/blob/c17ef9bc5dab5b98a9eb863b5c316aa06df69c27/cmd/goal/clerk.go#L1024-L1052)

Click here to show the 29 line(s) of Go which triggered the analyzer.

```go
for i, txn := range txgroup {
if txn.Lsig.Blank() {
continue
}
ep := logic.EvalParams{Txn: &txn, Proto: ¶ms}
cost, err := logic.Check(txn.Lsig.Logic, ep)
if err != nil {
reportErrorf("program failed Check: %s", err)
}
sb := strings.Builder{}
ep = logic.EvalParams{
Txn: &txn,
GroupIndex: i,
Proto: ¶ms,
Trace: &sb,
TxnGroup: txgroup,
}
pass, err := logic.Eval(txn.Lsig.Logic, ep)
// TODO: optionally include `inspect` output here?
fmt.Fprintf(os.Stdout, "tx[%d] cost=%d trace:\n%s\n", i, cost, sb.String())
if pass {
fmt.Fprintf(os.Stdout, " - pass -\n")
} else {
fmt.Fprintf(os.Stdout, "REJECT\n")
}
if err != nil {
fmt.Fprintf(os.Stdout, "ERROR: %s\n", err.Error())
}
}

```

Leave a reaction on this issue to contribute to the project by classifying this instance as a **Bug** :-1:, **Mitigated** :+1:, or **Desirable Behavior** :rocket:
See the descriptions of the classifications [here](https://github.com/github-vet/rangeclosure-findings#how-can-i-help) for more information.

commit ID: c17ef9bc5dab5b98a9eb863b5c316aa06df69c27

Inspect cmd/goal/clerk.go around lines 1024-1052, starting with the range loop and the EvalParams composite literals that reference txn. Determine whether the analyzer finding represents a bug, mitigated behavior, or desirable behavior, then leave the corresponding reaction on this issue; completion is the requested classification.

Written by the indexing model from the issue text.