The test proposed kills `sandbox.proc` == `std::process:Child`.
This kill makes the `sandbox` instance unusable. The current testbench checks with `lsof` command, using the `sandbox.proc`'s pid, comparing the outputs, before `sandbox.kill()` and after.

A better way to test may be adding an extra field to the `ExecutionResult` struct:

```rust
pub struct ExecutionResult {
    pub call_info: Option<CallInfo>,
    pub revert_error: Option<String>,
		pub native_or_casm: Option<String>, // <- For example
    pub n_reverted_steps: usize,
}
```

in order to return some info related to the environment used to run the contract whenever `execution_entry_point.rs::execute()` is used.

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