[INFO] fetching crate mcf-config-demo-lib 0.1.0...
[INFO] checking mcf-config-demo-lib-0.1.0 against beta-2020-07-24 for pr-75494-beta
[INFO] extracting crate mcf-config-demo-lib 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate mcf-config-demo-lib 0.1.0 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mcf-config-demo-lib 0.1.0
[INFO] finished tweaking crates.io crate mcf-config-demo-lib 0.1.0
[INFO] tweaked toml for crates.io crate mcf-config-demo-lib 0.1.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d4713e45f3e91546aa8f2025abbd0602a230876733cf25fb5b6f1b08cad397e8
[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" "d4713e45f3e91546aa8f2025abbd0602a230876733cf25fb5b6f1b08cad397e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d4713e45f3e91546aa8f2025abbd0602a230876733cf25fb5b6f1b08cad397e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4713e45f3e91546aa8f2025abbd0602a230876733cf25fb5b6f1b08cad397e8", kill_on_drop: false }`
[INFO] [stdout] d4713e45f3e91546aa8f2025abbd0602a230876733cf25fb5b6f1b08cad397e8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9a96dc0e6bbdafd9a5cac33fd0ea68da65913f59e48950e13404fabd73dab3d9
[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" "9a96dc0e6bbdafd9a5cac33fd0ea68da65913f59e48950e13404fabd73dab3d9", kill_on_drop: false }`
[INFO] [stderr]     Checking mcf-config-demo-settings v0.1.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mcf-config-demo-settings-0.1.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(min_const_fn)]
[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 `mcf-config-demo-settings`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "9a96dc0e6bbdafd9a5cac33fd0ea68da65913f59e48950e13404fabd73dab3d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a96dc0e6bbdafd9a5cac33fd0ea68da65913f59e48950e13404fabd73dab3d9", kill_on_drop: false }`
[INFO] [stdout] 9a96dc0e6bbdafd9a5cac33fd0ea68da65913f59e48950e13404fabd73dab3d9
