[INFO] cloning repository https://github.com/bokuweb/wu-diff-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bokuweb/wu-diff-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbokuweb%2Fwu-diff-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbokuweb%2Fwu-diff-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 442be7095f7ef710c6ef74c004a54940917d7143
[INFO] testing bokuweb/wu-diff-rs against 1.47.0 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbokuweb%2Fwu-diff-rs" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bokuweb/wu-diff-rs on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bokuweb/wu-diff-rs
[INFO] finished tweaking git repo https://github.com/bokuweb/wu-diff-rs
[INFO] tweaked toml for git repo https://github.com/bokuweb/wu-diff-rs written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/bokuweb/wu-diff-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fdccf7b093ae6ffd259df6bfffe23e4a4a8b970b367b1dfb8341e6871a2363cf
[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" "fdccf7b093ae6ffd259df6bfffe23e4a4a8b970b367b1dfb8341e6871a2363cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fdccf7b093ae6ffd259df6bfffe23e4a4a8b970b367b1dfb8341e6871a2363cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdccf7b093ae6ffd259df6bfffe23e4a4a8b970b367b1dfb8341e6871a2363cf", kill_on_drop: false }`
[INFO] [stdout] fdccf7b093ae6ffd259df6bfffe23e4a4a8b970b367b1dfb8341e6871a2363cf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7ee0b5ea8ddf9bc7a1306e45571c8b15447113331624f9df915eb082a485e345
[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" "7ee0b5ea8ddf9bc7a1306e45571c8b15447113331624f9df915eb082a485e345", kill_on_drop: false }`
[INFO] [stderr]    Compiling wu-diff v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `Command { std: "docker" "inspect" "7ee0b5ea8ddf9bc7a1306e45571c8b15447113331624f9df915eb082a485e345", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ee0b5ea8ddf9bc7a1306e45571c8b15447113331624f9df915eb082a485e345", kill_on_drop: false }`
[INFO] [stdout] 7ee0b5ea8ddf9bc7a1306e45571c8b15447113331624f9df915eb082a485e345
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+1.47.0" "test" "--frozen" "--no-run" "--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] 2d471ba06a49dd4e9993e62fe69c4d52d939e2f08130f194dce7a4bb2580a2f1
[INFO] running `Command { std: "docker" "start" "-a" "2d471ba06a49dd4e9993e62fe69c4d52d939e2f08130f194dce7a4bb2580a2f1", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.42
[INFO] [stderr]    Compiling cast v0.2.2
[INFO] [stderr]    Compiling thread-scoped v1.0.2
[INFO] [stderr]    Compiling crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling atty v0.2.9
[INFO] [stderr]    Compiling itertools v0.7.8
[INFO] [stderr]    Compiling term v0.5.1
[INFO] [stderr]    Compiling deflate v0.7.18
[INFO] [stderr]    Compiling itertools-num v0.1.1
[INFO] [stderr]    Compiling enum_primitive v0.1.1
[INFO] [stderr]    Compiling base64 v0.9.2
[INFO] [stderr]    Compiling chrono v0.4.2
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]    Compiling pest_derive v1.0.7
[INFO] [stderr]    Compiling clap v2.31.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling syn v0.13.1
[INFO] [stderr]    Compiling criterion-stats v0.2.3
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling png v0.11.0
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]    Compiling criterion-plot v0.2.3
[INFO] [stderr]    Compiling rayon v1.0.1
[INFO] [stderr]    Compiling simplelog v0.5.1
[INFO] [stderr]    Compiling serde_derive_internals v0.23.1
[INFO] [stderr]    Compiling jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling serde_derive v1.0.42
[INFO] [stderr]    Compiling image v0.18.0
[INFO] [stderr]    Compiling serde_json v1.0.16
[INFO] [stderr]    Compiling handlebars v0.31.0
[INFO] [stderr]    Compiling criterion v0.2.3
[INFO] [stderr]    Compiling wu-diff v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> tests/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(extern_prelude)]
[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 `wu-diff`.
[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" "2d471ba06a49dd4e9993e62fe69c4d52d939e2f08130f194dce7a4bb2580a2f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d471ba06a49dd4e9993e62fe69c4d52d939e2f08130f194dce7a4bb2580a2f1", kill_on_drop: false }`
[INFO] [stdout] 2d471ba06a49dd4e9993e62fe69c4d52d939e2f08130f194dce7a4bb2580a2f1
