[INFO] cloning repository https://github.com/weiyinfu/learnRust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/weiyinfu/learnRust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fweiyinfu%2FlearnRust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fweiyinfu%2FlearnRust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8b92f974f76c58bb7409cbe26d320d3d66d04aef
[INFO] documenting weiyinfu/learnRust against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fweiyinfu%2FlearnRust" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/weiyinfu/learnRust on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/weiyinfu/learnRust
[INFO] finished tweaking git repo https://github.com/weiyinfu/learnRust
[INFO] tweaked toml for git repo https://github.com/weiyinfu/learnRust written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/weiyinfu/learnRust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ea049fce3fcf86ee5a9ce4387f6de5aee80ba911efb1d2255fee74d188b52959
[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" "ea049fce3fcf86ee5a9ce4387f6de5aee80ba911efb1d2255fee74d188b52959", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea049fce3fcf86ee5a9ce4387f6de5aee80ba911efb1d2255fee74d188b52959", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea049fce3fcf86ee5a9ce4387f6de5aee80ba911efb1d2255fee74d188b52959", kill_on_drop: false }`
[INFO] [stdout] ea049fce3fcf86ee5a9ce4387f6de5aee80ba911efb1d2255fee74d188b52959
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 43ba178b12817858a7ad746a1b293023436afabe2f635523ceb3f8470ab1ba7a
[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" "43ba178b12817858a7ad746a1b293023436afabe2f635523ceb3f8470ab1ba7a", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]     Checking futures-task v0.3.4
[INFO] [stderr]     Checking smallvec v0.4.5
[INFO] [stderr]     Checking backtrace-sys v0.1.35
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]    Compiling pin-project-internal v0.4.9
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]     Checking backtrace v0.3.46
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]     Checking ferris-says v0.1.2
[INFO] [stderr]     Checking tokio v0.2.20
[INFO] [stderr]     Checking pin-project v0.4.9
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking h2 v0.2.4
[INFO] [stderr]     Checking serde_json v1.0.52
[INFO] [stderr]     Checking hyper v0.13.5
[INFO] [stderr]     Checking learnRust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting learnRust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `b`
[INFO] [stdout]   --> src/cnTest.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn b() {}
[INFO] [stdout]    |    ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `haha`
[INFO] [stdout]  --> src/useFolder/one.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn haha() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `haha`
[INFO] [stdout]  --> src/useFolder/mod.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn haha() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `learnRust`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name learnRust src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern chrono=/opt/rustwide/target/debug/deps/libchrono-b712c5ddecc17db4.rmeta --extern ferris_says=/opt/rustwide/target/debug/deps/libferris_says-6f332f24c266d3c4.rmeta --extern hyper=/opt/rustwide/target/debug/deps/libhyper-94e67baf8263def6.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-db88f49d9e5662e7.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-0a8922ca1ab2fc25.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-19ffbe5b52a34a1c.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-6319294348dc1d4f.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-37c14ce59cf12503.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-a612d78d019ab084.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "43ba178b12817858a7ad746a1b293023436afabe2f635523ceb3f8470ab1ba7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43ba178b12817858a7ad746a1b293023436afabe2f635523ceb3f8470ab1ba7a", kill_on_drop: false }`
[INFO] [stdout] 43ba178b12817858a7ad746a1b293023436afabe2f635523ceb3f8470ab1ba7a