[INFO] fetching crate playback-rs 0.4.4...
[INFO] testing playback-rs-0.4.4 against 1.91.0 for beta-1.92-2
[INFO] extracting crate playback-rs 0.4.4 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate playback-rs 0.4.4
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate playback-rs 0.4.4
[INFO] tweaked toml for crates.io crate playback-rs 0.4.4 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate playback-rs 0.4.4 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate playback-rs 0.4.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded symphonia-format-ogg v0.5.4
[INFO] [stderr]   Downloaded symphonia v0.5.4
[INFO] [stderr]   Downloaded symphonia-format-riff v0.5.4
[INFO] [stderr]   Downloaded symphonia-metadata v0.5.4
[INFO] [stderr]   Downloaded symphonia-utils-xiph v0.5.4
[INFO] [stderr]   Downloaded extended v0.1.0
[INFO] [stderr]   Downloaded symphonia-codec-adpcm v0.5.4
[INFO] [stderr]   Downloaded symphonia-format-mkv v0.5.4
[INFO] [stderr]   Downloaded symphonia-codec-pcm v0.5.4
[INFO] [stderr]   Downloaded bytemuck v1.16.1
[INFO] [stderr]   Downloaded thiserror-impl v1.0.62
[INFO] [stderr]   Downloaded tracing-error v0.2.0
[INFO] [stderr]   Downloaded realfft v3.3.0
[INFO] [stderr]   Downloaded libloading v0.8.4
[INFO] [stderr]   Downloaded symphonia-bundle-mp3 v0.5.4
[INFO] [stderr]   Downloaded cc v1.1.4
[INFO] [stderr]   Downloaded symphonia-core v0.5.4
[INFO] [stderr]   Downloaded symphonia-codec-aac v0.5.4
[INFO] [stderr]   Downloaded symphonia-codec-vorbis v0.5.4
[INFO] [stderr]   Downloaded symphonia-format-isomp4 v0.5.4
[INFO] [stderr]   Downloaded primal-check v0.3.4
[INFO] [stderr]   Downloaded rubato v0.12.0
[INFO] [stderr]   Downloaded color-spantrace v0.2.1
[INFO] [stderr]   Downloaded symphonia-bundle-flac v0.5.4
[INFO] [stderr]   Downloaded thiserror v1.0.62
[INFO] [stderr]   Downloaded simplelog v0.12.2
[INFO] [stderr]   Downloaded symphonia-codec-alac v0.5.4
[INFO] [stderr]   Downloaded rustfft v6.2.0
[INFO] [stderr]   Downloaded color-eyre v0.6.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 18ff30059d6540f74d62ee8180963cee3202a5acb97c0e1e3212f0bc541fb93b
[INFO] running `Command { std: "docker" "start" "-a" "18ff30059d6540f74d62ee8180963cee3202a5acb97c0e1e3212f0bc541fb93b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "18ff30059d6540f74d62ee8180963cee3202a5acb97c0e1e3212f0bc541fb93b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18ff30059d6540f74d62ee8180963cee3202a5acb97c0e1e3212f0bc541fb93b", kill_on_drop: false }`
[INFO] [stdout] 18ff30059d6540f74d62ee8180963cee3202a5acb97c0e1e3212f0bc541fb93b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0c872189689ebfd668ad4cd52b81045b8d57a0f5146e5aa4a45f1621df2b8eef
[INFO] running `Command { std: "docker" "start" "-a" "0c872189689ebfd668ad4cd52b81045b8d57a0f5146e5aa4a45f1621df2b8eef", kill_on_drop: false }`
[INFO] [stderr]    Compiling arrayvec v0.7.4
[INFO] [stderr]    Compiling bytemuck v1.16.1
[INFO] [stderr]    Compiling once_cell v1.19.0
[INFO] [stderr]    Compiling encoding_rs v0.8.34
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling strength_reduce v0.2.4
[INFO] [stderr]    Compiling cc v1.1.4
[INFO] [stderr]    Compiling eyre v0.6.12
[INFO] [stderr]    Compiling memchr v2.7.4
[INFO] [stderr]    Compiling gimli v0.28.1
[INFO] [stderr]    Compiling alsa-sys v0.3.1
[INFO] [stderr]    Compiling rustfft v6.2.0
[INFO] [stderr]    Compiling miniz_oxide v0.7.4
[INFO] [stderr]    Compiling owo-colors v3.5.0
[INFO] [stderr]    Compiling extended v0.1.0
[INFO] [stderr]    Compiling cpal v0.15.3
[INFO] [stderr]    Compiling tracing-core v0.1.32
[INFO] [stderr]    Compiling thread_local v1.1.8
[INFO] [stderr]    Compiling symphonia-core v0.5.4
[INFO] [stderr]    Compiling indenter v0.3.3
[INFO] [stderr]    Compiling dasp_sample v0.11.0
[INFO] [stderr]    Compiling alsa v0.9.0
[INFO] [stderr]    Compiling tracing-subscriber v0.3.18
[INFO] [stderr]    Compiling tracing v0.1.40
[INFO] [stderr]    Compiling object v0.32.2
[INFO] [stderr]    Compiling symphonia-codec-adpcm v0.5.4
[INFO] [stderr]    Compiling symphonia-codec-aac v0.5.4
[INFO] [stderr]    Compiling symphonia-codec-pcm v0.5.4
[INFO] [stderr]    Compiling symphonia-codec-alac v0.5.4
[INFO] [stderr]    Compiling backtrace v0.3.71
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling num-complex v0.4.6
[INFO] [stderr]    Compiling symphonia-metadata v0.5.4
[INFO] [stderr]    Compiling primal-check v0.3.4
[INFO] [stderr]    Compiling transpose v0.2.3
[INFO] [stderr]    Compiling symphonia-utils-xiph v0.5.4
[INFO] [stderr]    Compiling symphonia-format-riff v0.5.4
[INFO] [stderr]    Compiling symphonia-bundle-mp3 v0.5.4
[INFO] [stderr]    Compiling symphonia-format-ogg v0.5.4
[INFO] [stderr]    Compiling symphonia-codec-vorbis v0.5.4
[INFO] [stderr]    Compiling symphonia-format-isomp4 v0.5.4
[INFO] [stderr]    Compiling symphonia-format-mkv v0.5.4
[INFO] [stderr]    Compiling symphonia-bundle-flac v0.5.4
[INFO] [stderr]    Compiling addr2line v0.21.0
[INFO] [stderr]    Compiling tracing-error v0.2.0
[INFO] [stderr]    Compiling symphonia v0.5.4
[INFO] [stderr]    Compiling color-spantrace v0.2.1
[INFO] [stderr]    Compiling color-eyre v0.6.3
[INFO] [stderr]    Compiling realfft v3.3.0
[INFO] [stderr]    Compiling rubato v0.12.0
[INFO] [stderr]    Compiling playback-rs v0.4.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(c_variadic)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `playback-rs` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "0c872189689ebfd668ad4cd52b81045b8d57a0f5146e5aa4a45f1621df2b8eef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c872189689ebfd668ad4cd52b81045b8d57a0f5146e5aa4a45f1621df2b8eef", kill_on_drop: false }`
[INFO] [stdout] 0c872189689ebfd668ad4cd52b81045b8d57a0f5146e5aa4a45f1621df2b8eef