[INFO] fetching crate unbounded-spsc 0.1.6...
[INFO] testing unbounded-spsc-0.1.6 against 1.59.0 for beta-1.60-1
[INFO] extracting crate unbounded-spsc 0.1.6 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate unbounded-spsc 0.1.6 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate unbounded-spsc 0.1.6
[INFO] finished tweaking crates.io crate unbounded-spsc 0.1.6
[INFO] tweaked toml for crates.io crate unbounded-spsc 0.1.6 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate crates.io crate unbounded-spsc 0.1.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 92860d35ab28072c3ac2f0c213518b5ed27948a3c8766b274ecfbc80671c18f0
[INFO] running `Command { std: "docker" "start" "-a" "92860d35ab28072c3ac2f0c213518b5ed27948a3c8766b274ecfbc80671c18f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "92860d35ab28072c3ac2f0c213518b5ed27948a3c8766b274ecfbc80671c18f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92860d35ab28072c3ac2f0c213518b5ed27948a3c8766b274ecfbc80671c18f0", kill_on_drop: false }`
[INFO] [stdout] 92860d35ab28072c3ac2f0c213518b5ed27948a3c8766b274ecfbc80671c18f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 30f57c567cb2610cdf3a54c744866065da7110e18732045e0c1cdbc31958c58d
[INFO] running `Command { std: "docker" "start" "-a" "30f57c567cb2610cdf3a54c744866065da7110e18732045e0c1cdbc31958c58d", kill_on_drop: false }`
[INFO] [stderr]    Compiling bounded-spsc-queue v0.4.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/bounded-spsc-queue-0.4.0/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(allocator_api)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bounded-spsc-queue` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "30f57c567cb2610cdf3a54c744866065da7110e18732045e0c1cdbc31958c58d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30f57c567cb2610cdf3a54c744866065da7110e18732045e0c1cdbc31958c58d", kill_on_drop: false }`
[INFO] [stdout] 30f57c567cb2610cdf3a54c744866065da7110e18732045e0c1cdbc31958c58d