Bevy 0.5.0 can't run with DefaultPlugins: BackendSpecificError #2314

kugiyasan · 2021-06-07T14:17:35Z

Bevy version

bevy = "0.5.0"

Operating system & version

Arch Linux x86_64 5.10.42-1-lts
DE: KDE Plasma

What you did

cargo new cant_load_default_plugin
cd cant_load_default_plugin
printf 'use bevy::prelude::*;\nfn main() { App::build().add_plugins(DefaultPlugins).run(); }' > src/main.rs
echo 'bevy = "0.5.0"' >> Cargo.toml
cargo run

What you expected to happen

The program should build

What actually happened

5 compilation errors about use of unstable library feature

I then tried

rustup override set nightly
RUST_BACKTRACE=1 cargo run

but then

thread 'main' panicked at 'build_output_stream failed with all supported formats: BackendSpecific { err: BackendSpecificError { description: "ALSA function 'snd_pcm_start' failed with error 'EBADFD: File descriptor in bad state'" } }', $HOME/.cargo/registry/src/github.com-1ecc6299db9ec823/rodio-0.13.1/src/stream.rs:208:22
stack backtrace:
   0: rust_begin_unwind
             at /rustc/dbe459dedd33470f2cb28101157de316caaffa66/library/std/src/panicking.rs:515:5
   1: core::panicking::panic_fmt
             at /rustc/dbe459dedd33470f2cb28101157de316caaffa66/library/core/src/panicking.rs:92:14
   2: core::result::unwrap_failed
             at /rustc/dbe459dedd33470f2cb28101157de316caaffa66/library/core/src/result.rs:1355:5
   3: core::result::Result<T,E>::expect
             at /rustc/dbe459dedd33470f2cb28101157de316caaffa66/library/core/src/result.rs:997:23
   4: <cpal::platform::platform_impl::Device as rodio::stream::CpalDeviceExt>::try_new_output_stream::{{closure}}
             at $HOME/.cargo/registry/src/github.com-1ecc6299db9ec823/rodio-0.13.1/src/stream.rs:204:17
   5: core::result::Result<T,E>::unwrap_or_else
             at /rustc/dbe459dedd33470f2cb28101157de316caaffa66/library/core/src/result.rs:821:23
   6: <cpal::platform::platform_impl::Device as rodio::stream::CpalDeviceExt>::try_new_output_stream
             at $HOME/.cargo/registry/src/github.com-1ecc6299db9ec823/rodio-0.13.1/src/stream.rs:200:12
   7: rodio::stream::OutputStream::try_from_device
             at $HOME/.cargo/registry/src/github.com-1ecc6299db9ec823/rodio-0.13.1/src/stream.rs:31:32
   8: rodio::stream::OutputStream::try_default
             at $HOME/.cargo/registry/src/github.com-1ecc6299db9ec823/rodio-0.13.1/src/stream.rs:45:9
   9: <bevy_audio::audio_output::AudioOutput<P> as core::default::Default>::default
             at $HOME/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_audio-0.5.0/src/audio_output.rs:22:39
  10: <T as bevy_ecs::world::FromWorld>::from_world
             at $HOME/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_ecs-0.5.0/src/world/mod.rs:928:9
  11: bevy_app::app_builder::AppBuilder::init_non_send_resource
             at $HOME/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_app-0.5.0/src/app_builder.rs:272:28
  12: <bevy_audio::AudioPlugin as bevy_app::plugin::Plugin>::build
             at $HOME/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_audio-0.5.0/src/lib.rs:23:9
  13: bevy_app::plugin_group::PluginGroupBuilder::finish
             at $HOME/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_app-0.5.0/src/plugin_group.rs:104:21
  14: bevy_app::app_builder::AppBuilder::add_plugins
             at $HOME/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_app-0.5.0/src/app_builder.rs:295:9
  15: cant_load_default_plugin::main
             at ./src/main.rs:1:35
  16: core::ops::function::FnOnce::call_once
             at /rustc/dbe459dedd33470f2cb28101157de316caaffa66/library/core/src/ops/function.rs:227:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

I also tried this src/main.rs, and this runs and exits instantly without any error, while I expected it to never exit

use bevy::prelude::*;
fn main() {
    App::build()
        .add_plugin(bevy::log::LogPlugin::default())
        .add_plugin(bevy::core::CorePlugin::default())
        .add_plugin(bevy::transform::TransformPlugin::default())
        .add_plugin(bevy::diagnostic::DiagnosticsPlugin::default())
        .add_plugin(bevy::input::InputPlugin::default())
        .add_plugin(bevy::window::WindowPlugin::default())
        .add_plugin(bevy::asset::AssetPlugin::default())
        .add_plugin(bevy::scene::ScenePlugin::default())
        .run();
}

The text was updated successfully, but these errors were encountered:

MinerSebas · 2021-06-07T14:28:36Z

5 compilation errors about use of unstable library feature

Bevy requires the latest stable, that's the reason for your compilation errors

Nightly

Seems like your ALSA install has problems: "ALSA function 'snd_pcm_start' failed with error 'EBADFD: File descriptor in bad state'"
Did you take a look here? https://github.com/bevyengine/bevy/blob/main/docs/linux_dependencies.md#arch--manjaro
For now, you could disable the bevy_audio and mp3 Features to still compile

I also tried this src/main.rs, and this runs and exits instantly without any error, while I expected it to never exit

Bevy needs a runner to drive the update loop/keep Bevy running, but you are missing WinitPlugin which provides it in Bevy.

kugiyasan · 2021-06-07T14:37:45Z

Thanks for the quick answer!

Yes, I was on the latest stable, but like I briefly said, I got 5 unstable features compilation errors, like the one below, and that's why I tried the nightly toolchain

rustup override set stable
cargo run
[...]
error[E0658]: use of unstable library feature 'unsafe_cell_get_mut'
   --> $HOME.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_ecs-0.5.0/src/storage/sparse_set.rs:217:32
    |
217 |         let ticks = self.ticks.get_mut().iter_mut();
    |                                ^^^^^^^
    |
    = note: see issue #76943 <https://github.com/rust-lang/rust/issues/76943> for more information

error: aborting due to 5 previous errors

For more information about this error, try `rustc --explain E0658`.
error: could not compile `bevy_ecs`

To learn more, run the command again with --verbose.
warning: build failed, waiting for other jobs to finish...
error: build failed

I already looked at the dependencies, I reinstalled libx11 pkgconf alsa-lib, same results

MinerSebas · 2021-06-07T14:40:47Z

Realy strange 🤔 , that Feature was stabilised in 1.50.0: rust-lang/rust#79485

NathanSWard · 2021-06-07T14:58:10Z

What is your output from cargo --version and rustc --version?

kugiyasan · 2021-06-07T15:03:40Z

Oops noob mistake, my stable was 1.49.0, I just had to rustup update. I somehow thought that rust would magically keep my stable always up to date...

$ cargo --version
cargo 1.52.0 (69767412a 2021-04-21)
$ rustc --version
rustc 1.52.1 (9bc8c42bb 2021-05-09)

For now, you could disable the `bevy_audio` and `mp3` Features to still compile

I still need to disable bevy_audio and mp3 to be able to run the program. It's not a problem for me, since I don't have intentions to touch the audio for now, but this still needs further investigation ig

NathanSWard · 2021-06-08T16:14:35Z

@kugiyasan
Is it ok then if we close out this issue since your primary concern was solved?

MinerSebas · 2021-06-08T16:50:19Z

#2269 also should have fixed that bevy panicks in your case. (Though you will still be missing audio)

Pomegranate123 · 2021-06-15T16:01:44Z

I'm having the exact same problem, I was going through the Bevy book and as soon as I added .add_plugins(DefaultPlugins) I got the same error:

$ cargo r
    Finished dev [unoptimized + debuginfo] target(s) in 0.37s
     Running `target/debug/game`
thread 'main' panicked at 'build_output_stream failed with all supported formats: BackendSpecific { err: BackendSpecificError { description: "ALSA function \'snd_pcm_start\' failed with error \'EBADFD: File descriptor in bad state\'" } }', /home/pomegranate/.cargo/registry/src/github.com-1ecc6299db9ec823/rodio-0.13.1/src/stream.rs:208:22
stack backtrace:
   0: rust_begin_unwind
             at /rustc/07e0e2ec268c140e607e1ac7f49f145612d0f597/library/std/src/panicking.rs:493:5
   1: core::panicking::panic_fmt
             at /rustc/07e0e2ec268c140e607e1ac7f49f145612d0f597/library/core/src/panicking.rs:92:14
   2: core::option::expect_none_failed
             at /rustc/07e0e2ec268c140e607e1ac7f49f145612d0f597/library/core/src/option.rs:1329:5
   3: core::result::Result<T,E>::expect
             at /home/pomegranate/.config/rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/result.rs:997:23
   4: <cpal::platform::platform_impl::Device as rodio::stream::CpalDeviceExt>::try_new_output_stream::{{closure}}
             at /home/pomegranate/.cargo/registry/src/github.com-1ecc6299db9ec823/rodio-0.13.1/src/stream.rs:204:17
   5: core::result::Result<T,E>::unwrap_or_else
             at /home/pomegranate/.config/rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/result.rs:821:23
   6: <cpal::platform::platform_impl::Device as rodio::stream::CpalDeviceExt>::try_new_output_stream
             at /home/pomegranate/.cargo/registry/src/github.com-1ecc6299db9ec823/rodio-0.13.1/src/stream.rs:200:12
   7: rodio::stream::OutputStream::try_from_device
             at /home/pomegranate/.cargo/registry/src/github.com-1ecc6299db9ec823/rodio-0.13.1/src/stream.rs:31:32
   8: rodio::stream::OutputStream::try_default
             at /home/pomegranate/.cargo/registry/src/github.com-1ecc6299db9ec823/rodio-0.13.1/src/stream.rs:45:9
   9: <bevy_audio::audio_output::AudioOutput<P> as core::default::Default>::default
             at /home/pomegranate/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_audio-0.5.0/src/audio_output.rs:22:39
  10: <T as bevy_ecs::world::FromWorld>::from_world
             at /home/pomegranate/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_ecs-0.5.0/src/world/mod.rs:928:9
  11: bevy_app::app_builder::AppBuilder::init_non_send_resource
             at /home/pomegranate/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_app-0.5.0/src/app_builder.rs:272:28
  12: <bevy_audio::AudioPlugin as bevy_app::plugin::Plugin>::build
             at /home/pomegranate/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_audio-0.5.0/src/lib.rs:23:9
  13: bevy_app::plugin_group::PluginGroupBuilder::finish
             at /home/pomegranate/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_app-0.5.0/src/plugin_group.rs:104:21
  14: bevy_app::app_builder::AppBuilder::add_plugins
             at /home/pomegranate/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_app-0.5.0/src/app_builder.rs:295:9
  15: game::main
             at ./src/main.rs:8:5
  16: core::ops::function::FnOnce::call_once
             at /home/pomegranate/.config/rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ops/function.rs:227:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

Versions:

$ cargo --version
cargo 1.52.0-nightly (90691f2bf 2021-03-16)
$ rustc --version
rustc 1.53.0-nightly (07e0e2ec2 2021-03-24)
$ uname -rm
5.12.2-arch1-1 x86_64

Cargo.toml:

$ cat Cargo.toml
[package]
name = "game"
version = "0.1.0"
authors = ["Pomegranate123 <#####@#####.####>"]
edition = "2018"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
bevy = { version = "0.5.0", features = ["dynamic"] }

I reinstalled the necessary dependencies for Arch, but nothing changed. Removing the dynamic feature also didn't work.

bjorn3 · 2021-06-15T16:16:03Z

ALSA function 'snd_pcm_start' failed with error 'EBADFD: File descriptor in bad state'

This is a problem with initializing the sound plugin. Since #2269 this no longer causes a crash. Just missing sound.

Pomegranate123 · 2021-06-15T16:20:45Z

What do you mean with 'no longer causes a crash'? My code isn't compiling because of it, isn't that a crash? What would I need to do to fix it?

bjorn3 · 2021-06-15T16:24:20Z

Your code does compile. It just crashed when actually running it due to failed initialization of the sound plugin. The fix would be to either disable the sound plugin (.add_plugins_with(DefaultPlugins, |plugins| plugins.disable::<bevy::audio::AudioPlugin>())) or switch to the main branch.

Pomegranate123 · 2021-06-15T16:30:20Z

Alright, but what if I do want to use sound? Is anything known about the actual issue yet, workaround aside?

bjorn3 · 2021-06-15T16:40:11Z

Not that I know. Some people have this issue, most don't so it is hard to reproduce.

kugiyasan · 2021-06-18T03:07:03Z

@Pomegranate123 I finally found a fix! I tried a bunch of things, and I discovered that I couldn't play sound with ALSA. Test your ALSA with aplay -v a_random_sound.wav. If you don't hear any sound, make sure the printed output device matches the one you're using. Mine didn't match, so I changed my default alsa output device like explained here, and boom, bevy audio worked!

Pomegranate123 · 2021-06-19T14:15:37Z

@Pomegranate123 I finally found a fix! I tried a bunch of things, and I discovered that I couldn't play sound with ALSA. Test your ALSA with aplay -v a_random_sound.wav. If you don't hear any sound, make sure the printed output device matches the one you're using. Mine didn't match, so I changed my default alsa output device like explained here, and boom, bevy audio worked!

Sadly didn't work. I was already using the correct device and could play audio fine. The only issue is when I try to use bevy. I'm also using pulseaudio, if that changes anything.

kugiyasan added C-Bug An unexpected or incorrect behavior S-Needs-Triage This issue needs to be labelled labels Jun 7, 2021

kugiyasan closed this as completed Jun 8, 2021

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alice-i-cecile added O-Linux Specific to the Linux desktop operating system and removed S-Needs-Triage This issue needs to be labelled labels Jul 8, 2021

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Bevy 0.5.0 can't run with DefaultPlugins: BackendSpecificError #2314

Bevy 0.5.0 can't run with DefaultPlugins: BackendSpecificError #2314

kugiyasan commented Jun 7, 2021

MinerSebas commented Jun 7, 2021 •

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Pomegranate123 commented Jun 19, 2021

Bevy 0.5.0 can't run with DefaultPlugins: BackendSpecificError #2314

Bevy 0.5.0 can't run with DefaultPlugins: BackendSpecificError #2314

Comments

kugiyasan commented Jun 7, 2021

Bevy version

Operating system & version

What you did

What you expected to happen

What actually happened

MinerSebas commented Jun 7, 2021 • edited Loading

kugiyasan commented Jun 7, 2021

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MinerSebas commented Jun 8, 2021

Pomegranate123 commented Jun 15, 2021 • edited Loading

bjorn3 commented Jun 15, 2021

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