[INFO] fetching crate dst 0.1.0...
[INFO] testing dst-0.1.0 against 1.54.0 for beta-1.55-1
[INFO] extracting crate dst 0.1.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate dst 0.1.0 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dst 0.1.0
[INFO] finished tweaking crates.io crate dst 0.1.0
[INFO] tweaked toml for crates.io crate dst 0.1.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d324da8b1420148aa68eec8c7270c11199863acb3adcd04e890dc4fa1a5d668e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d324da8b1420148aa68eec8c7270c11199863acb3adcd04e890dc4fa1a5d668e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d324da8b1420148aa68eec8c7270c11199863acb3adcd04e890dc4fa1a5d668e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d324da8b1420148aa68eec8c7270c11199863acb3adcd04e890dc4fa1a5d668e", kill_on_drop: false }`
[INFO] [stdout] d324da8b1420148aa68eec8c7270c11199863acb3adcd04e890dc4fa1a5d668e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6289a210e9e410dbbde9c8ed6a0c099c1a1979cf204b65bff0c266ab249287d7
[INFO] running `Command { std: "docker" "start" "-a" "6289a210e9e410dbbde9c8ed6a0c099c1a1979cf204b65bff0c266ab249287d7", kill_on_drop: false }`
[INFO] [stderr]    Compiling dst v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:50
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(not(feature = "undefined_behavior"), feature(layout_for_ptr))]
[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:3:35
[INFO] [stdout]   |
[INFO] [stdout] 3 |   #![cfg_attr(feature = "unstable", feature(
[INFO] [stdout]   |  ___________________________________^
[INFO] [stdout] 4 | |     const_raw_ptr_deref,
[INFO] [stdout] 5 | |     const_mut_refs,
[INFO] [stdout] 6 | |     const_align_of_val_raw,
[INFO] [stdout] 7 | |     const_size_of_val_raw,
[INFO] [stdout] 8 | |     const_slice_from_raw_parts,
[INFO] [stdout] 9 | | ))]
[INFO] [stdout]   | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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 `dst`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "6289a210e9e410dbbde9c8ed6a0c099c1a1979cf204b65bff0c266ab249287d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6289a210e9e410dbbde9c8ed6a0c099c1a1979cf204b65bff0c266ab249287d7", kill_on_drop: false }`
[INFO] [stdout] 6289a210e9e410dbbde9c8ed6a0c099c1a1979cf204b65bff0c266ab249287d7
