[INFO] fetching crate simple_calculator_cmd 0.1.1...
[INFO] testing simple_calculator_cmd-0.1.1 against 1.59.0 for beta-1.60-1
[INFO] extracting crate simple_calculator_cmd 0.1.1 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate simple_calculator_cmd 0.1.1 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 simple_calculator_cmd 0.1.1
[INFO] finished tweaking crates.io crate simple_calculator_cmd 0.1.1
[INFO] tweaked toml for crates.io crate simple_calculator_cmd 0.1.1 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate simple_calculator_cmd 0.1.1 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-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a021e80e6344f54951044b668971567ea12034c3f0b777982ac8df1570688f4c
[INFO] running `Command { std: "docker" "start" "-a" "a021e80e6344f54951044b668971567ea12034c3f0b777982ac8df1570688f4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a021e80e6344f54951044b668971567ea12034c3f0b777982ac8df1570688f4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a021e80e6344f54951044b668971567ea12034c3f0b777982ac8df1570688f4c", kill_on_drop: false }`
[INFO] [stdout] a021e80e6344f54951044b668971567ea12034c3f0b777982ac8df1570688f4c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c0c9a64436f65be5c213d692a6d50db0727da21c42d9e90e5795837232d420a3
[INFO] running `Command { std: "docker" "start" "-a" "c0c9a64436f65be5c213d692a6d50db0727da21c42d9e90e5795837232d420a3", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling simple_calculator_deliver v0.1.1
[INFO] [stderr]    Compiling simple_calculator_cmd v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(exclusive_range_pattern)]
[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:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(bool_to_option)]
[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 `simple_calculator_cmd` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "c0c9a64436f65be5c213d692a6d50db0727da21c42d9e90e5795837232d420a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0c9a64436f65be5c213d692a6d50db0727da21c42d9e90e5795837232d420a3", kill_on_drop: false }`
[INFO] [stdout] c0c9a64436f65be5c213d692a6d50db0727da21c42d9e90e5795837232d420a3