[INFO] cloning repository https://github.com/3for/rustLearning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/3for/rustLearning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F3for%2FrustLearning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F3for%2FrustLearning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5e833fc5d7817bdc16a205e96707b3cf8f48dbd2
[INFO] testing 3for/rustLearning against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F3for%2FrustLearning" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/3for/rustLearning 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 git repo https://github.com/3for/rustLearning
[INFO] finished tweaking git repo https://github.com/3for/rustLearning
[INFO] tweaked toml for git repo https://github.com/3for/rustLearning written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/3for/rustLearning 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded log v0.4.2
[INFO] [stderr]   Downloaded tokio-codec v0.1.0
[INFO] [stderr]   Downloaded base64 v0.9.2
[INFO] [stderr]   Downloaded indexmap v1.0.1
[INFO] [stderr]   Downloaded mime v0.3.7
[INFO] [stderr]   Downloaded tls-api-stub v0.1.19
[INFO] [stderr]   Downloaded httpbis v0.5.0
[INFO] [stderr]   Downloaded grpc v0.3.1
[INFO] [stderr]   Downloaded tls-api v0.1.19
[INFO] [stderr]   Downloaded tokio-fs v0.1.1
[INFO] [stderr]   Downloaded tokio v0.1.7
[INFO] [stderr]   Downloaded tokio-reactor v0.1.2
[INFO] [stderr]   Downloaded stable_deref_trait v1.1.0
[INFO] [stderr]   Downloaded mio-uds v0.6.6
[INFO] [stderr]   Downloaded tokio-tls-api v0.1.19
[INFO] [stderr]   Downloaded tokio-timer v0.2.4
[INFO] [stderr]   Downloaded crossbeam-epoch v0.4.3
[INFO] [stderr]   Downloaded bytes v0.4.8
[INFO] [stderr]   Downloaded amq-proto v0.1.0
[INFO] [stderr]   Downloaded tokio-udp v0.1.1
[INFO] [stderr]   Downloaded tokio-io v0.1.7
[INFO] [stderr]   Downloaded amqp v0.1.1
[INFO] [stderr]   Downloaded string v0.1.0
[INFO] [stderr]   Downloaded tokio-threadpool v0.1.4
[INFO] [stderr]   Downloaded want v0.0.5
[INFO] [stderr]   Downloaded h2 v0.1.10
[INFO] [stderr]   Downloaded ws v0.7.6
[INFO] [stderr]   Downloaded http v0.1.6
[INFO] [stderr]   Downloaded protobuf v1.5.1
[INFO] [stderr]   Downloaded hyper v0.12.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] [stdout] ce6ff7a663cf081f8305f6cf36532bbff35ddab409e06b1e9a94be230fef3ded
[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" "ce6ff7a663cf081f8305f6cf36532bbff35ddab409e06b1e9a94be230fef3ded", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ce6ff7a663cf081f8305f6cf36532bbff35ddab409e06b1e9a94be230fef3ded", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce6ff7a663cf081f8305f6cf36532bbff35ddab409e06b1e9a94be230fef3ded", kill_on_drop: false }`
[INFO] [stdout] ce6ff7a663cf081f8305f6cf36532bbff35ddab409e06b1e9a94be230fef3ded
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] [stdout] 8dffd06e5ca7dcf3afb4588d58dcc6b9cc7268039f2c6e962340658e31c8475d
[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" "8dffd06e5ca7dcf3afb4588d58dcc6b9cc7268039f2c6e962340658e31c8475d", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures v0.1.21
[INFO] [stderr]    Compiling slab v0.4.0
[INFO] [stderr]    Compiling lazycell v0.6.0
[INFO] [stderr]    Compiling cc v1.0.17
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]    Compiling smallvec v0.6.2
[INFO] [stderr]    Compiling unicode-normalization v0.1.7
[INFO] [stderr]    Compiling stable_deref_trait v1.1.0
[INFO] [stderr]    Compiling httparse v1.2.4
[INFO] [stderr]    Compiling rustc-demangle v0.1.8
[INFO] [stderr]    Compiling indexmap v1.0.1
[INFO] [stderr]    Compiling bit-vec v0.4.4
[INFO] [stderr]    Compiling string v0.1.0
[INFO] [stderr]    Compiling itoa v0.4.1
[INFO] [stderr]    Compiling error v0.1.0 (/opt/rustwide/workdir/error)
[INFO] [stderr]    Compiling pubsub v0.1.0 (/opt/rustwide/workdir/pubsub)
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling time v0.1.40
[INFO] [stderr]    Compiling log v0.4.2
[INFO] [stderr]    Compiling net2 v0.2.32
[INFO] [stderr]    Compiling crossbeam-utils v0.3.2
[INFO] [stderr]    Compiling unix_socket v0.5.0
[INFO] [stderr]    Compiling base64 v0.9.2
[INFO] [stderr]    Compiling unicase v2.1.0
[INFO] [stderr]    Compiling owning_ref v0.3.3
[INFO] [stderr]    Compiling parking_lot_core v0.2.14
[INFO] [stderr]    Compiling bytes v0.4.8
[INFO] [stderr]    Compiling aho-corasick v0.5.3
[INFO] [stderr]    Compiling uuid v0.5.1
[INFO] [stderr]    Compiling serde_json v1.0.21
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.66
[INFO] [stderr]    Compiling crossbeam-epoch v0.4.3
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling tls-api v0.1.19
[INFO] [stderr]    Compiling mio v0.6.14
[INFO] [stderr]    Compiling parking_lot v0.5.5
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr]    Compiling tls-api-stub v0.1.19
[INFO] [stderr]    Compiling protobuf v1.5.1
[INFO] [stderr]    Compiling http v0.1.6
[INFO] [stderr]    Compiling crossbeam-deque v0.3.1
[INFO] [stderr]    Compiling regex v0.1.80
[INFO] [stderr]    Compiling util v0.1.0 (/opt/rustwide/workdir/util)
[INFO] [stderr]    Compiling mime v0.3.7
[INFO] [stderr]    Compiling backtrace-sys v0.1.23
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> util/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_from)]
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `try_from` has been stable since 1.34.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> util/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_from)]
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` 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 `util` due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "8dffd06e5ca7dcf3afb4588d58dcc6b9cc7268039f2c6e962340658e31c8475d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8dffd06e5ca7dcf3afb4588d58dcc6b9cc7268039f2c6e962340658e31c8475d", kill_on_drop: false }`
[INFO] [stdout] 8dffd06e5ca7dcf3afb4588d58dcc6b9cc7268039f2c6e962340658e31c8475d