cannot run smallvil

[Linermao]

Can anyone help me? When trying smallvil, I found issues in winit.rs

I started a new project with cargo, copied smallvil files, and used this config:

[dependencies]
tracing-subscriber = { version = "0.3.16", features = ["env-filter"] }
bitflags = "2.2.1"

[dependencies.smithay]
version = "^0.5"

The code runs fine in smithay's project, but in mine, winit.rs shows errors at line 71:

let (renderer, mut framebuffer) = backend.bind().unwrap();

I noticed different bind implementations in the two files.

So I changed:

let (renderer, mut framebuffer) = backend.bind().unwrap() ->  let renderer = backend.renderer();

And removed &mut framebuffer in render_output.

There's also a warning about std::env::set_var("WAYLAND_DISPLAY", &state.socket_name) being unsafe, so I wrapped it in unsafe. Now the code runs, but has issues during execution.

2025-03-17T13:05:33.103260Z  INFO input_seat{name="winit"}:add_keyboard{xkb_config=XkbConfig { rules: "", model: "", layout: "", variant: "", options: None } repeat_delay=200 repeat_rate=25}:input_keyboard: smithay::input::keyboard: Initializing a xkbcommon handler with keymap query
2025-03-17T13:05:33.105145Z  INFO input_seat{name="winit"}:add_keyboard{xkb_config=XkbConfig { rules: "", model: "", layout: "", variant: "", options: None } repeat_delay=200 repeat_rate=25}:input_keyboard: smithay::input::keyboard: Loaded Keymap name="English (US)"
2025-03-17T13:05:33.105726Z  INFO smithay::wayland::socket: Created new socket name=Some("wayland-2")
2025-03-17T13:05:33.105837Z  INFO backend_winit: smithay::backend::winit: Initializing a winit backend
2025-03-17T13:05:33.132439Z  INFO backend_winit{window=102177032735168}: smithay::backend::egl::display: Successfully selected EGL platform: PLATFORM_WAYLAND_KHR
2025-03-17T13:05:33.135201Z ERROR backend_winit{window=102177032735168}: smithay::backend::egl::ffi: [EGL] 0x3004 (BAD_ATTRIBUTE) eglCreateSyncKHR: EGL_BAD_ATTRIBUTE error: In eglCreateSyncKHR: EGL_SYNC_NATIVE_FENCE_FD_ANDROID specified valid fd butEGL_SYNC_STATUS is also being set
2025-03-17T13:05:33.136257Z  INFO backend_winit{window=102177032735168}: smithay::backend::egl::display: EGL Initialized
2025-03-17T13:05:33.136276Z  INFO backend_winit{window=102177032735168}: smithay::backend::egl::display: EGL Version: (1, 5)
.....
.....
2025-03-17T13:05:33.176985Z  INFO new{name="winit" physical=PhysicalProperties { size: Size<smithay::utils::geometry::Raw> { w: 0, h: 0 }, subpixel: Unknown, make: "Smithay", model: "Winit" }}: smithay::output: Creating new Output name="winit"
2025-03-17T13:05:33.177042Z  INFO smithay::wayland::output: Creating new wl_output output="winit"
2025-03-17T13:05:33.178559Z ERROR backend_winit{window=102177032735168}:egl{platform="PLATFORM_WAYLAND_KHR" version=(1, 5)}:egl_context{ptr=102177034300577}:renderer_gles2: smithay::backend::renderer::gles: [GL] GL_INVALID_FRAMEBUFFER_OPERATION error generated. Operation is not valid because a bound framebuffer is not framebuffer complete.
thread 'main' panicked at /home/alvin/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/smithay-0.5.1/src/backend/winit/mod.rs:338:22:
submitting without ever binding the renderer.
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
failed to connect to Wayland display: No such file or directory
failed to create display: No such file or directory

I can't figure out the error reasons. Hope someone can help find the problem and guide me to fix it.

This is full code