[INFO] fetching crate libdeadmock 0.1.6...
[INFO] testing libdeadmock-0.1.6 against beta-2020-10-09 for beta-1.48-1
[INFO] extracting crate libdeadmock 0.1.6 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate libdeadmock 0.1.6 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate libdeadmock 0.1.6
[INFO] finished tweaking crates.io crate libdeadmock 0.1.6
[INFO] tweaked toml for crates.io crate libdeadmock 0.1.6 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded hyper-proxy v0.8.0
[INFO] [stderr]   Downloaded cached_proc_macro v0.4.0
[INFO] [stderr]   Downloaded tokio-async-await v0.1.7
[INFO] [stderr]   Downloaded tokio v0.1.19
[INFO] [stderr]   Downloaded libeither v0.4.0
[INFO] [stderr]   Downloaded tomlenv v0.4.1
[INFO] [stderr]   Downloaded typed-headers v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "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] dd169d5370a10955352836c6c31b002c29600126269182e315992de0f63c387c
[INFO] running `Command { std: "docker" "start" "-a" "dd169d5370a10955352836c6c31b002c29600126269182e315992de0f63c387c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dd169d5370a10955352836c6c31b002c29600126269182e315992de0f63c387c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd169d5370a10955352836c6c31b002c29600126269182e315992de0f63c387c", kill_on_drop: false }`
[INFO] [stdout] dd169d5370a10955352836c6c31b002c29600126269182e315992de0f63c387c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4721e4423fa4cc8c91c93df30ad6435663b7a109fd38065eca9e3f49a90f459a
[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" "4721e4423fa4cc8c91c93df30ad6435663b7a109fd38065eca9e3f49a90f459a", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures v0.1.30
[INFO] [stderr]    Compiling dirs-sys v0.3.5
[INFO] [stderr]    Compiling slog-try v0.2.0
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling getset v0.1.1
[INFO] [stderr]    Compiling tokio v0.2.22
[INFO] [stderr]    Compiling typed-headers v0.2.0
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling libeither v0.4.0
[INFO] [stderr]    Compiling futures-util v0.3.6
[INFO] [stderr]    Compiling slog-async v2.5.0
[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/libeither-0.4.0/src/lib.rs:63:35
[INFO] [stdout]    |
[INFO] [stdout] 63 | #![cfg_attr(feature = "unstable", feature(error_iter))]
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling dirs v2.0.2
[INFO] [stderr]    Compiling term v0.6.1
[INFO] [stdout] error[E0599]: no function or associated item named `iter_sources` found for trait object `dyn StdError` in the current scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libeither-0.4.0/src/error.rs:79:38
[INFO] [stdout]    |
[INFO] [stdout] 79 |         let res = std::error::Error::iter_sources(self).fold(
[INFO] [stdout]    |                                      ^^^^^^^^^^^^ function or associated item not found in `dyn StdError`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `libeither`
[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" "4721e4423fa4cc8c91c93df30ad6435663b7a109fd38065eca9e3f49a90f459a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4721e4423fa4cc8c91c93df30ad6435663b7a109fd38065eca9e3f49a90f459a", kill_on_drop: false }`
[INFO] [stdout] 4721e4423fa4cc8c91c93df30ad6435663b7a109fd38065eca9e3f49a90f459a
