Lifetime expansion when infos reference other data in builders

[Oliver-makes-code]

let window = Arc::new(event_loop.create_window(Window::default_attributes())?);

let version = vk::make_version(ENGINE_VERSION.0, ENGINE_VERSION.1, ENGINE_VERSION.2);

let info = {
    let application_info = vk::ApplicationInfo::builder() // <-- Lifetime 'a start
        .engine_name(ENGINE_NAME_BYTES)
        .engine_version(version)
        .application_name(GAME_NAME_BYTES)
        .application_version(version)
        .api_version(vk::make_version(1, 4, 0))
        .build();

    let extensions = vulkanalia::window::get_required_instance_extensions(&window) // <-- Lifetime 'b start
        .iter()
        .map(|e| e.as_ptr())
        .collect::<Vec<_>>();

    let info = vk::InstanceCreateInfo::builder() // <-- Lifetime 'c start
        .application_info(&application_info)
        .enabled_extension_names(&extensions)
        .build(); // <-- build() discards lifetime information

    info // Lifetime 'c passed to upper `info`, lifetime 'a, and 'b end, but since the lifetime information was discarded, Rust lets this happens
};

This is because your InstanceCreateInfo doesn't reference any lifetimes for the objects it references

#[repr(C)]
#[derive(Copy, Clone, Debug, Eq, Hash, PartialEq)]
pub struct InstanceCreateInfo {
    pub s_type: StructureType,
    pub next: *const c_void,
    pub flags: InstanceCreateFlags,
    pub application_info: *const ApplicationInfo, // <-- Pointer to direct ApplicationInfo, not a reference, so lifetime is not preserved
    pub enabled_layer_count: u32,
    pub enabled_layer_names: *const *const c_char,
    pub enabled_extension_count: u32,
    pub enabled_extension_names: *const *const c_char, // <-- Same here
}

It can be fixed by doing this, to mark that the create info depends on the lifetime of another object

#[repr(C)]
#[derive(Copy, Clone, Debug, Eq, Hash, PartialEq)]
pub struct InstanceCreateInfo<'a> {
    pub s_type: StructureType,
    pub next: *const c_void,
    pub flags: InstanceCreateFlags,
    pub application_info: *const ApplicationInfo,
    pub enabled_layer_count: u32,
    pub enabled_layer_names: *const *const c_char,
    pub enabled_extension_count: u32,
    pub enabled_extension_names: *const *const c_char,
    pub _marker: PhantomData<&'a ()> // Phantom Data is a ZST, it will not affect the layout
}

I stumbled across this when I noticed that the info doesn't contain a lifetime, so I thought the info stored the direct objects for them, but when I went to check it didn't
This issue likely occurs with other infos, since they do the same thing