v1.18: Remove unnecessary unwrap from simulate_transaction_unchecked() (backport of #35375) (#35397)

Remove unnecessary unwrap from `simulate_transaction_unchecked()` (#35375)

Remove unnecessary unwrap from simulate_transaction_unchecked()

(cherry picked from commit cb260f1)

Co-authored-by: Pankaj Garg <[email protected]>

Author: mergify[bot]

runtime/src/bank.rs

@@ -4295,9 +4295,7 @@ impl Bank {
         let post_simulation_accounts = loaded_transactions
             .into_iter()
             .next()
-            .unwrap()
-            .0
-            .ok()
+            .and_then(|(loaded_transactions_res, _)| loaded_transactions_res.ok())
             .map(|loaded_transaction| {
                 loaded_transaction
                     .accounts
@@ -4319,7 +4317,12 @@ impl Bank {
 
         debug!("simulate_transaction: {:?}", timings);
 
-        let execution_result = execution_results.pop().unwrap();
+        let execution_result =
+            execution_results
+                .pop()
+                .unwrap_or(TransactionExecutionResult::NotExecuted(
+                    TransactionError::InvalidProgramForExecution,
+                ));
         let flattened_result = execution_result.flattened_result();
         let (logs, return_data, inner_instructions) = match execution_result {
             TransactionExecutionResult::Executed { details, .. } => (