[INFO] fetching crate zgc 0.0.1...
[INFO] testing zgc-0.0.1 against 1.76.0 for beta-1.77-1
[INFO] extracting crate zgc 0.0.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate zgc 0.0.1 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate zgc 0.0.1
[INFO] finished tweaking crates.io crate zgc 0.0.1
[INFO] tweaked toml for crates.io crate zgc 0.0.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 87f1b6a67b320145ae0292b4f77e0e94c0448bd2e75be6af6f5542ab5b473367
[INFO] running `Command { std: "docker" "start" "-a" "87f1b6a67b320145ae0292b4f77e0e94c0448bd2e75be6af6f5542ab5b473367", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "87f1b6a67b320145ae0292b4f77e0e94c0448bd2e75be6af6f5542ab5b473367", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87f1b6a67b320145ae0292b4f77e0e94c0448bd2e75be6af6f5542ab5b473367", kill_on_drop: false }`
[INFO] [stdout] 87f1b6a67b320145ae0292b4f77e0e94c0448bd2e75be6af6f5542ab5b473367
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+1.76.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c75a20b0d4140b13997faa49616d1e0d9db8f363355bf9a7b42df162241cbc1
[INFO] running `Command { std: "docker" "start" "-a" "2c75a20b0d4140b13997faa49616d1e0d9db8f363355bf9a7b42df162241cbc1", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v2.4.2
[INFO] [stderr]    Compiling zgc v0.0.1 (/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(allocator_api, slice_from_ptr_range)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:27
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(allocator_api, slice_from_ptr_range)]
[INFO] [stdout]   |                           ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(ptr_metadata)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `zgc` (lib) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "2c75a20b0d4140b13997faa49616d1e0d9db8f363355bf9a7b42df162241cbc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c75a20b0d4140b13997faa49616d1e0d9db8f363355bf9a7b42df162241cbc1", kill_on_drop: false }`
[INFO] [stdout] 2c75a20b0d4140b13997faa49616d1e0d9db8f363355bf9a7b42df162241cbc1
