- Implicitly fixes invoke_context.return_data not being reset between instructions in process_message. (#21671)

- Lets InvokeContext::process_cross_program_instruction() handle the first invocation depth too.
- Marks InvokeContext::verify(), InvokeContext::verify_and_update() and InvokeContext::process_executable_chain() private.
- Renames InvokeContext::process_cross_program_instruction() to InvokeContext::process_instruction().
- Removes InvokeContext::new_mock_with_sysvars().

rbpf-cli/src/main.rs

@@ -213,7 +213,7 @@ native machine code before execting it in the virtual machine.",
             &preparation.message,
             &preparation.message.instructions[0],
             &program_indices,
-            Some(&preparation.account_indices),
+            &preparation.account_indices,
         )
         .unwrap();
     let keyed_accounts = invoke_context.get_keyed_accounts().unwrap();