[INFO] cloning repository https://github.com/crumblingstatue/cowbump
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/crumblingstatue/cowbump" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrumblingstatue%2Fcowbump", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrumblingstatue%2Fcowbump'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8fd78f1ff496ec4eaf140621e63c733ba017f8e8
[INFO] documenting crumblingstatue/cowbump against 1.47.0 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrumblingstatue%2Fcowbump" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/crumblingstatue/cowbump 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/crumblingstatue/cowbump
[INFO] finished tweaking git repo https://github.com/crumblingstatue/cowbump
[INFO] tweaked toml for git repo https://github.com/crumblingstatue/cowbump written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/crumblingstatue/cowbump 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] [stderr]     Blocking waiting for file lock on package cache
[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" "+1.47.0" "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] 6b7c76eedeec8d7cda2fec6e635cdc85464e95cac0476cfab7b5cd91624db1ec
[INFO] running `Command { std: "docker" "start" "-a" "6b7c76eedeec8d7cda2fec6e635cdc85464e95cac0476cfab7b5cd91624db1ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b7c76eedeec8d7cda2fec6e635cdc85464e95cac0476cfab7b5cd91624db1ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b7c76eedeec8d7cda2fec6e635cdc85464e95cac0476cfab7b5cd91624db1ec", kill_on_drop: false }`
[INFO] [stdout] 6b7c76eedeec8d7cda2fec6e635cdc85464e95cac0476cfab7b5cd91624db1ec
[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" "RUSTDOCFLAGS=--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" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a555fb3f200add5ea6c4a70dbdac5deea9e466cf66d357a23beef7417389ddf8
[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" "a555fb3f200add5ea6c4a70dbdac5deea9e466cf66d357a23beef7417389ddf8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling proc-macro2 v1.0.21
[INFO] [stderr]    Compiling sfml-build v0.3.0 (https://github.com/jeremyletang/rust-sfml.git#24d70362)
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling rayon-core v1.8.0
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]     Checking either v1.6.0
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]     Checking object v0.20.0
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]     Checking bytemuck v1.4.1
[INFO] [stderr]     Checking once_cell v1.4.1
[INFO] [stderr]     Checking widestring v0.4.2
[INFO] [stderr]    Compiling memoffset v0.5.5
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling rayon v1.4.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.2
[INFO] [stderr]    Compiling num-rational v0.3.0
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]     Checking ropey v1.2.0
[INFO] [stderr]     Checking miniz_oxide v0.3.7
[INFO] [stderr]    Compiling csfml-system-sys v0.5.0 (https://github.com/jeremyletang/rust-sfml.git#24d70362)
[INFO] [stderr]    Compiling csfml-window-sys v0.5.0 (https://github.com/jeremyletang/rust-sfml.git#24d70362)
[INFO] [stderr]    Compiling csfml-graphics-sys v0.5.0 (https://github.com/jeremyletang/rust-sfml.git#24d70362)
[INFO] [stderr]     Checking deflate v0.8.6
[INFO] [stderr]     Checking crossbeam-channel v0.4.4
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking tiff v0.5.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking png v0.16.7
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]    Compiling xcb v0.9.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking sfml v0.15.1 (https://github.com/jeremyletang/rust-sfml.git#24d70362)
[INFO] [stderr]     Checking backtrace v0.3.50
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]     Checking jpeg-decoder v0.1.20
[INFO] [stderr]     Checking image v0.23.9
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking thiserror v1.0.20
[INFO] [stderr]     Checking arboard v1.0.1
[INFO] [stderr]  Documenting cowbump v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(decl_macro)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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 document `cowbump`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name cowbump src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern arboard=/opt/rustwide/target/debug/deps/libarboard-a8a51a8ca7501692.rmeta --extern bincode=/opt/rustwide/target/debug/deps/libbincode-6fd01e504616daee.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-97a9bd2f88dfba9f.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-5c42c9f242ff6ea9.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-72923b2d9aa06af7.rmeta --extern ropey=/opt/rustwide/target/debug/deps/libropey-f11acc7e8a3bcb0c.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-cb9c33aa52e48644.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-17e35f8c469cbea8.so --extern sfml=/opt/rustwide/target/debug/deps/libsfml-ef023470d9c95609.rmeta --extern walkdir=/opt/rustwide/target/debug/deps/libwalkdir-35cbba2d5b8a0a7f.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "a555fb3f200add5ea6c4a70dbdac5deea9e466cf66d357a23beef7417389ddf8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a555fb3f200add5ea6c4a70dbdac5deea9e466cf66d357a23beef7417389ddf8", kill_on_drop: false }`
[INFO] [stdout] a555fb3f200add5ea6c4a70dbdac5deea9e466cf66d357a23beef7417389ddf8
