[INFO] fetching crate fixed_circular_buffer 0.2.2...
[INFO] testing fixed_circular_buffer-0.2.2 against 1.75.0 for beta-1.76-1
[INFO] extracting crate fixed_circular_buffer 0.2.2 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate fixed_circular_buffer 0.2.2 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fixed_circular_buffer 0.2.2
[INFO] finished tweaking crates.io crate fixed_circular_buffer 0.2.2
[INFO] tweaked toml for crates.io crate fixed_circular_buffer 0.2.2 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c02fdd34d50c994c7d2a7fdc41cd96c8ef064d2514e513f48d33464b0c1cc05a
[INFO] running `Command { std: "docker" "start" "-a" "c02fdd34d50c994c7d2a7fdc41cd96c8ef064d2514e513f48d33464b0c1cc05a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c02fdd34d50c994c7d2a7fdc41cd96c8ef064d2514e513f48d33464b0c1cc05a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c02fdd34d50c994c7d2a7fdc41cd96c8ef064d2514e513f48d33464b0c1cc05a", kill_on_drop: false }`
[INFO] [stdout] c02fdd34d50c994c7d2a7fdc41cd96c8ef064d2514e513f48d33464b0c1cc05a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9a3e5aa6a73729790b75eb30e23ee32666b06985f5201ba8a3a3bd905f8c9c55
[INFO] running `Command { std: "docker" "start" "-a" "9a3e5aa6a73729790b75eb30e23ee32666b06985f5201ba8a3a3bd905f8c9c55", kill_on_drop: false }`
[INFO] [stderr]    Compiling fixed_circular_buffer v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(core)]
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `core` has been stable since 1.6.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(core)]
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fixed_circular_buffer` (lib) due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "9a3e5aa6a73729790b75eb30e23ee32666b06985f5201ba8a3a3bd905f8c9c55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a3e5aa6a73729790b75eb30e23ee32666b06985f5201ba8a3a3bd905f8c9c55", kill_on_drop: false }`
[INFO] [stdout] 9a3e5aa6a73729790b75eb30e23ee32666b06985f5201ba8a3a3bd905f8c9c55
[INFO] testing fixed_circular_buffer-0.2.2 against beta-2023-12-22 for beta-1.76-1
[INFO] extracting crate fixed_circular_buffer 0.2.2 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate fixed_circular_buffer 0.2.2 on toolchain beta-2023-12-22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fixed_circular_buffer 0.2.2
[INFO] finished tweaking crates.io crate fixed_circular_buffer 0.2.2
[INFO] tweaked toml for crates.io crate fixed_circular_buffer 0.2.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ef0dbebfae9c8c463d1f3780e864ac1e5ca98a6fae63141defc804a639b3fcb8
[INFO] running `Command { std: "docker" "start" "-a" "ef0dbebfae9c8c463d1f3780e864ac1e5ca98a6fae63141defc804a639b3fcb8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef0dbebfae9c8c463d1f3780e864ac1e5ca98a6fae63141defc804a639b3fcb8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef0dbebfae9c8c463d1f3780e864ac1e5ca98a6fae63141defc804a639b3fcb8", kill_on_drop: false }`
[INFO] [stdout] ef0dbebfae9c8c463d1f3780e864ac1e5ca98a6fae63141defc804a639b3fcb8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8dc2dcfdd454cd9de4ebb1090de36352e5f0821887262adcbd423fe1ebf73292
[INFO] running `Command { std: "docker" "start" "-a" "8dc2dcfdd454cd9de4ebb1090de36352e5f0821887262adcbd423fe1ebf73292", kill_on_drop: false }`
[INFO] [stderr]    Compiling fixed_circular_buffer v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(core)]
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `core` has been stable since 1.6.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(core)]
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fixed_circular_buffer` (lib) due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "8dc2dcfdd454cd9de4ebb1090de36352e5f0821887262adcbd423fe1ebf73292", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8dc2dcfdd454cd9de4ebb1090de36352e5f0821887262adcbd423fe1ebf73292", kill_on_drop: false }`
[INFO] [stdout] 8dc2dcfdd454cd9de4ebb1090de36352e5f0821887262adcbd423fe1ebf73292
