[INFO] fetching crate redox_installer 0.2.7...
[INFO] testing redox_installer-0.2.7 against 1.49.0 for beta-1.50-1
[INFO] extracting crate redox_installer 0.2.7 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate redox_installer 0.2.7 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate redox_installer 0.2.7
[INFO] finished tweaking crates.io crate redox_installer 0.2.7
[INFO] tweaked toml for crates.io crate redox_installer 0.2.7 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate crates.io crate redox_installer 0.2.7 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: the lock file /workspace/builds/worker-11/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "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-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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 825cd2943119de74eccb61d19af60ace97ba6ac6146e889ba98782bd9fc756ff
[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" "825cd2943119de74eccb61d19af60ace97ba6ac6146e889ba98782bd9fc756ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "825cd2943119de74eccb61d19af60ace97ba6ac6146e889ba98782bd9fc756ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "825cd2943119de74eccb61d19af60ace97ba6ac6146e889ba98782bd9fc756ff", kill_on_drop: false }`
[INFO] [stdout] 825cd2943119de74eccb61d19af60ace97ba6ac6146e889ba98782bd9fc756ff
[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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fd29fcbb2e0b5b9f1a35044ce6461c43f6b8c2daac7838601795af41632ad2d9
[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" "fd29fcbb2e0b5b9f1a35044ce6461c43f6b8c2daac7838601795af41632ad2d9", kill_on_drop: false }`
[INFO] [stderr]    Compiling subtle v1.0.0
[INFO] [stderr]    Compiling thread-scoped v1.0.2
[INFO] [stderr]    Compiling bytecount v0.6.2
[INFO] [stderr]    Compiling index-fixed v0.3.1
[INFO] [stderr]    Compiling redox_pkgutils v0.1.6
[INFO] [stderr]    Compiling keccak v0.1.0
[INFO] [stderr]    Compiling ordermap v0.2.13
[INFO] [stderr]    Compiling version-compare v0.0.10
[INFO] [stderr]    Compiling bidir-map v0.6.0
[INFO] [stderr]    Compiling plain v0.2.3
[INFO] [stderr]    Compiling arg_parser v0.1.0
[INFO] [stderr]    Compiling blake3 v0.2.3
[INFO] [stderr]    Compiling fuse v0.3.1
[INFO] [stderr]    Compiling blake2b_simd v0.5.11
[INFO] [stderr]    Compiling ring v0.13.5
[INFO] [stderr]    Compiling filetime v0.2.13
[INFO] [stderr]    Compiling xattr v0.2.2
[INFO] [stderr]    Compiling termion v1.5.5
[INFO] [stderr]    Compiling redox_syscall v0.2.1
[INFO] [stderr]    Compiling sodalite v0.3.0
[INFO] [stderr]    Compiling crypto-mac v0.7.0
[INFO] [stderr]    Compiling sha3 v0.8.2
[INFO] [stderr]    Compiling pbr v1.0.3
[INFO] [stderr]    Compiling tar v0.4.30
[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/redox_syscall-0.2.1/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(asm)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/redox_syscall-0.2.1/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(llvm_asm)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/redox_syscall-0.2.1/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(const_fn)] // see https://github.com/rust-lang/rfcs/pull/2632
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling redox_liner v0.5.1
[INFO] [stdout] error: aborting due to 3 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 `redox_syscall`
[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" "fd29fcbb2e0b5b9f1a35044ce6461c43f6b8c2daac7838601795af41632ad2d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd29fcbb2e0b5b9f1a35044ce6461c43f6b8c2daac7838601795af41632ad2d9", kill_on_drop: false }`
[INFO] [stdout] fd29fcbb2e0b5b9f1a35044ce6461c43f6b8c2daac7838601795af41632ad2d9