panic in singlepass leads to GasDepletion

[webmaster128]

When executing this test in singlepass, we get a GasDepletion error, which makes no sense:

#[test]
fn handle_panic() {
    let mut deps = mock_instance(WASM, &[]);

    let (init_msg, creator) = make_init_msg();
    let init_env = mock_env(creator.as_str(), &[]);
    let init_res: InitResponse = init(&mut deps, init_env, init_msg).unwrap();
    assert_eq!(0, init_res.messages.len());

    let handle_env = mock_env(creator.as_str(), &[]);
    // panic inside contract should not panic out here
    // Note: we need to use the production-call, not the testing call (which unwraps any vm error)
    let handle_res = call_handle::<_, _, _, Empty>(
        &mut deps,
        &handle_env,
        &to_vec(&HandleMsg::Panic {}).unwrap(),
    );
    match handle_res.unwrap_err() {
        VmError::RuntimeErr { .. } => {}
        err => panic!("Unexpected error: {:?}", err),
    }
}

[ethanfrey]

I think this is a duplicate of #375

(Or should I say, a test case that demos the issue described there)