[INFO] cloning repository https://github.com/Craig-Macomber/Life-Struggle
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Craig-Macomber/Life-Struggle" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCraig-Macomber%2FLife-Struggle", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCraig-Macomber%2FLife-Struggle'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 051d4626dafb950554469862d922425ceb2d3ff3
[INFO] documenting Craig-Macomber/Life-Struggle 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%2FCraig-Macomber%2FLife-Struggle" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Craig-Macomber/Life-Struggle 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] removed /workspace/builds/worker-11/source/.cargo/config
[INFO] started tweaking git repo https://github.com/Craig-Macomber/Life-Struggle
[INFO] finished tweaking git repo https://github.com/Craig-Macomber/Life-Struggle
[INFO] tweaked toml for git repo https://github.com/Craig-Macomber/Life-Struggle written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/Craig-Macomber/Life-Struggle 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] 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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f133012fed2364913019e633f759db6fdc8292c2077a24d66f915a71b95a6fe0
[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" "f133012fed2364913019e633f759db6fdc8292c2077a24d66f915a71b95a6fe0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f133012fed2364913019e633f759db6fdc8292c2077a24d66f915a71b95a6fe0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f133012fed2364913019e633f759db6fdc8292c2077a24d66f915a71b95a6fe0", kill_on_drop: false }`
[INFO] [stdout] f133012fed2364913019e633f759db6fdc8292c2077a24d66f915a71b95a6fe0
[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" "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] 5ea477f915f2e65ac2cee586f7f963ab7dcc0d684e17015ec33186c253c287be
[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" "5ea477f915f2e65ac2cee586f7f963ab7dcc0d684e17015ec33186c253c287be", kill_on_drop: false }`
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]    Compiling proc-macro2 v0.4.19
[INFO] [stderr]    Compiling rayon v1.0.2
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking inflate v0.4.3
[INFO] [stderr]     Checking gif v0.10.0
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]     Checking deflate v0.7.18
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking png v0.12.0
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]     Checking rayon-core v1.4.1
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling num-derive v0.2.2
[INFO] [stderr]     Checking image v0.19.0
[INFO] [stderr]  Documenting life_struggle 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(test)]
[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 `life_struggle`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name life_struggle 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 fixedbitset=/opt/rustwide/target/debug/deps/libfixedbitset-7d34b40fc5884c31.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-784c9edda8700556.rmeta --extern num_integer=/opt/rustwide/target/debug/deps/libnum_integer-f44bfa043cfb25e5.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-38abf4ae9700d3e4.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-7316be01e1ddaa62.rmeta --extern time=/opt/rustwide/target/debug/deps/libtime-5553670a88d06564.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "5ea477f915f2e65ac2cee586f7f963ab7dcc0d684e17015ec33186c253c287be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ea477f915f2e65ac2cee586f7f963ab7dcc0d684e17015ec33186c253c287be", kill_on_drop: false }`
[INFO] [stdout] 5ea477f915f2e65ac2cee586f7f963ab7dcc0d684e17015ec33186c253c287be
