The library segfaults when I close a window.

[Oglo12]

Is your issue REALLY a bug?

• My issue is indeed a bug!
• I am not crazy! I will not fill out this form just to ask a question or request a feature. Pinky promise.

Is there an existing issue for this?

• I have searched the existing issues.

Is this issue related to iced?

• My hardware is compatible and my graphics drivers are up-to-date.

What happened?

I was running the examples, and after every example, the code would segfault when I close the window.

Could it be because of Wayland?

What is the expected behavior?

Uh... to close the window, but not because of a segmentation fault.

Version

master

Operating System

Linux

Do you have any log output?

Segmentation fault (core dumped)

[At11011]

I have this problem as well. I am running Ubuntu 24.04, cargo 1.83.0 (5ffbef321 2024-10-29), rustc 1.83.0 (90b35a623 2024-11-26).

When you click the 'x' at the top right (for example in the bezier_tool example (compiled and ran by cargo run --prbezier_tool:

You get this output in debug and release mode (release mode by adding the --release flag in the cargo command above:

It would be good to know if there is a way to get the program to exit more gracefully. Especially if producing a release-ready app, it really should not be segfaulting every time it closes.

Considering this is happening in repository examples, I suspect it is more of a bug than expected behavior.

[MikMuellerDev]

Same on Nixos

[njust]

Same on Ubuntu 22.04 (master and the 0.13.1 release). I've noticed that it doesn't segfault when the tiny-skia renderer is used.

[Koranir]

Could be relevant: gfx-rs/wgpu#4650

Might be fixable by switching the drop order of the wgpu Surface and winit Window.

[Koranir]

Potentially relevant backtrace:

#0  0x00007ffff7faf88c in wl_map_insert_at (map=map@entry=0x555557cbc120, flags=flags@entry=1, i=45, data=<optimized out>) at ../wayland-1.23.1/src/wayland-util.c:290
#1  0x00007ffff7fafa01 in proxy_destroy (proxy=proxy@entry=0x5555583fd570) at ../wayland-1.23.1/src/wayland-client.c:574
#2  0x00007ffff7fb17c7 in wl_proxy_destroy_caller_locks (proxy=0x5555583fd570) at ../wayland-1.23.1/src/wayland-client.c:598
#3  wl_proxy_marshal_array_flags (proxy=proxy@entry=0x5555583fd570, opcode=opcode@entry=0, interface=interface@entry=0x0, version=version@entry=4, flags=flags@entry=1, args=args@entry=0x7fffffff96b0) at ../wayland-1.23.1/src/wayland-client.c:943
#4  0x00007ffff7fb23bb in wl_proxy_marshal_flags (proxy=proxy@entry=0x5555583fd570, opcode=opcode@entry=0, interface=interface@entry=0x0, version=4, flags=flags@entry=1) at ../wayland-1.23.1/src/wayland-client.c:857
#5  0x00007ffff4b32a64 in zwp_linux_dmabuf_feedback_v1_destroy (zwp_linux_dmabuf_feedback_v1=0x5555583fd570) at src/libnvidia-egl-wayland.so.1.1.17.p/linux-dmabuf-unstable-v1-client-protocol.h:1076
#6  wlEglDestroyFeedback (feedback=0x5555583fcba0) at ../egl-wayland/src/wayland-egldisplay.c:163
#7  terminateDisplay (display=display@entry=0x5555583fcab0, globalTeardown=globalTeardown@entry=0) at ../egl-wayland/src/wayland-egldisplay.c:734
#8  0x00007ffff4b3465c in wlEglTerminateHook (dpy=<optimized out>) at ../egl-wayland/src/wayland-egldisplay.c:779
#9  0x00007ffff44ae700 in ?? () from /usr/lib/libEGL_nvidia.so.0
#10 0x00007ffff4449a97 in ?? () from /usr/lib/libEGL_nvidia.so.0
#11 0x00005555575c02c0 in khronos_egl::{impl#97}::eglTerminate<libloading::safe::Library> (self=0x555557d74970, display=0x5555583fcab0) at /home/koranir/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/khronos-egl-6.0.0/src/lib.rs:2321
#12 khronos_egl::Instance<khronos_egl::Dynamic<libloading::safe::Library, khronos_egl::EGL1_4>>::terminate<khronos_egl::Dynamic<libloading::safe::Library, khronos_egl::EGL1_4>> (self=0x555557d74970, display=...)
    at /home/koranir/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/khronos-egl-6.0.0/src/lib.rs:1181
#13 0x00005555575447f6 in wgpu_hal::gles::egl::terminate_display (egl=0x555557d74970, display=...) at src/gles/egl.rs:501
#14 0x00005555575482d1 in wgpu_hal::gles::egl::{impl#11}::drop (self=0x555558161208) at src/gles/egl.rs:718
#15 0x00005555574e3077 in core::ptr::drop_in_place<wgpu_hal::gles::egl::Inner> () at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:522
#16 0x00005555574e569b in core::ptr::drop_in_place<core::cell::UnsafeCell<wgpu_hal::gles::egl::Inner>> () at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:522
#17 0x00005555574e02ff in core::ptr::drop_in_place<lock_api::mutex::Mutex<parking_lot::raw_mutex::RawMutex, wgpu_hal::gles::egl::Inner>> () at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:522
#18 0x00005555574e34bc in core::ptr::drop_in_place<wgpu_hal::gles::egl::Instance> () at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:522
#19 0x000055555729ad44 in core::ptr::drop_in_place<alloc::boxed::Box<dyn wgpu_hal::dynamic::instance::DynInstance, alloc::alloc::Global>> () at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:522
#20 0x000055555728a36f in core::ptr::drop_in_place<(wgpu_types::Backend, alloc::boxed::Box<dyn wgpu_hal::dynamic::instance::DynInstance, alloc::alloc::Global>)> ()
    at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:522
#21 0x000055555728bc7e in core::ptr::drop_in_place<[(wgpu_types::Backend, alloc::boxed::Box<dyn wgpu_hal::dynamic::instance::DynInstance, alloc::alloc::Global>)]> ()
    at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:522
#22 0x0000555557249d63 in alloc::vec::{impl#25}::drop<(wgpu_types::Backend, alloc::boxed::Box<dyn wgpu_hal::dynamic::instance::DynInstance, alloc::alloc::Global>), alloc::alloc::Global> (self=0x5555581603a8)
    at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/alloc/src/vec/mod.rs:3754
#23 0x000055555728cf87 in core::ptr::drop_in_place<alloc::vec::Vec<(wgpu_types::Backend, alloc::boxed::Box<dyn wgpu_hal::dynamic::instance::DynInstance, alloc::alloc::Global>), alloc::alloc::Global>> ()
    at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:522
#24 0x000055555729049c in core::ptr::drop_in_place<wgpu_core::instance::Instance> () at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:522
#25 0x00005555571dbc04 in core::ptr::drop_in_place<wgpu_core::global::Global> () at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:522
#26 0x00005555571dcb04 in core::ptr::drop_in_place<wgpu::backend::wgpu_core::ContextWgpuCore> () at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:522
#27 0x00005555571dc15d in core::ptr::drop_in_place<dyn wgpu::context::DynContext> () at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:522
#28 0x0000555557202990 in alloc::sync::Arc<dyn wgpu::context::DynContext, alloc::alloc::Global>::drop_slow<dyn wgpu::context::DynContext, alloc::alloc::Global> (self=0x555557cdcc70)
    at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/alloc/src/sync.rs:1885
#29 0x0000555557202fbd in alloc::sync::{impl#37}::drop<dyn wgpu::context::DynContext, alloc::alloc::Global> (self=0x555557cdcc70) at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/alloc/src/sync.rs:2572
#30 0x00005555571dd64b in core::ptr::drop_in_place<alloc::sync::Arc<dyn wgpu::context::DynContext, alloc::alloc::Global>> () at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:522
#31 0x00005555568aa3c7 in core::ptr::drop_in_place<wgpu::api::bind_group_layout::BindGroupLayout> () at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:522
#32 0x000055555688a36c in core::ptr::drop_in_place<iced_wgpu::triangle::gradient::Pipeline> () at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:522
#33 0x0000555556889557 in core::ptr::drop_in_place<iced_wgpu::triangle::Pipeline> () at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:522
#34 0x000055555616f6bb in core::ptr::drop_in_place<iced_wgpu::engine::Engine> () at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:522
#35 0x0000555556170c7c in core::ptr::drop_in_place<iced_wgpu::window::compositor::Compositor> () at /home/koranir/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:522

[Koranir]

Interestingly, it doesn't segfault if I set the WGPU_BACKEND environment variable to 'gl' or 'vulkan'.