[INFO] fetching crate rc2 0.6.0...
[INFO] checking rc2-0.6.0 against beta for pr-78714
[INFO] extracting crate rc2 0.6.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate rc2 0.6.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rc2 0.6.0
[INFO] finished tweaking crates.io crate rc2 0.6.0
[INFO] tweaked toml for crates.io crate rc2 0.6.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 39e2b231e5d3cac98ee9b234c585e45a91cfcb3c948a465c31908e4f276476b9
[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" "39e2b231e5d3cac98ee9b234c585e45a91cfcb3c948a465c31908e4f276476b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39e2b231e5d3cac98ee9b234c585e45a91cfcb3c948a465c31908e4f276476b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39e2b231e5d3cac98ee9b234c585e45a91cfcb3c948a465c31908e4f276476b9", kill_on_drop: false }`
[INFO] [stdout] 39e2b231e5d3cac98ee9b234c585e45a91cfcb3c948a465c31908e4f276476b9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=forbid" "-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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 175e710a92b6e0a973ac3c78a15cea59f87140a069ad7d0fc2595a147a942beb
[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" "175e710a92b6e0a973ac3c78a15cea59f87140a069ad7d0fc2595a147a942beb", kill_on_drop: false }`
[INFO] [stderr]     Checking blobby v0.3.0
[INFO] [stderr]     Checking cipher v0.2.5
[INFO] [stderr]     Checking rc2 v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> benches/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `cipher::bench`: use `block_cipher_bench!` instead
[INFO] [stdout]  --> benches/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | cipher::bench!(rc2::Rc2, 16);
[INFO] [stdout]   | ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` 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 `rc2`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "175e710a92b6e0a973ac3c78a15cea59f87140a069ad7d0fc2595a147a942beb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "175e710a92b6e0a973ac3c78a15cea59f87140a069ad7d0fc2595a147a942beb", kill_on_drop: false }`
[INFO] [stdout] 175e710a92b6e0a973ac3c78a15cea59f87140a069ad7d0fc2595a147a942beb