[INFO] cloning repository https://github.com/erochest/straw-boss
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/erochest/straw-boss" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferochest%2Fstraw-boss", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferochest%2Fstraw-boss'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e7eed4cb1b88978d9292396b622a40db78fc01a6
[INFO] documenting erochest/straw-boss against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferochest%2Fstraw-boss" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/erochest/straw-boss on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/erochest/straw-boss
[INFO] finished tweaking git repo https://github.com/erochest/straw-boss
[INFO] tweaked toml for git repo https://github.com/erochest/straw-boss written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/erochest/straw-boss already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0c17a7e8c750e8cc4fc2e08c729be7c7b42f78c28769c952fab386320a4c11eb
[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" "0c17a7e8c750e8cc4fc2e08c729be7c7b42f78c28769c952fab386320a4c11eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c17a7e8c750e8cc4fc2e08c729be7c7b42f78c28769c952fab386320a4c11eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c17a7e8c750e8cc4fc2e08c729be7c7b42f78c28769c952fab386320a4c11eb", kill_on_drop: false }`
[INFO] [stdout] 0c17a7e8c750e8cc4fc2e08c729be7c7b42f78c28769c952fab386320a4c11eb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--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] 2e13e4db99112a5499bc9914ab7bcaa9296a25b1088dc229d16069412d4a2e59
[INFO] running `Command { std: "docker" "start" "-a" "2e13e4db99112a5499bc9914ab7bcaa9296a25b1088dc229d16069412d4a2e59", kill_on_drop: false }`
[INFO] [stderr]    Compiling sysinfo v0.5.1
[INFO] [stderr]    Compiling memchr v2.1.0
[INFO] [stderr]     Checking daemonize v0.3.0
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking regex-syntax v0.5.3
[INFO] [stderr]     Checking rmp v0.8.7
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking nix v0.10.0
[INFO] [stderr]     Checking backtrace v0.3.5
[INFO] [stderr]    Compiling serde_derive v1.0.27
[INFO] [stderr]     Checking shared_child v0.3.2
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]     Checking aho-corasick v0.6.8
[INFO] [stderr]     Checking regex v0.2.10
[INFO] [stderr]     Checking shellwords v0.1.0
[INFO] [stderr]     Checking os_pipe v0.6.1
[INFO] [stderr]     Checking duct v0.11.0
[INFO] [stderr]     Checking serde v1.0.27
[INFO] [stderr]     Checking rmp-serde v0.13.7
[INFO] [stderr]     Checking serde_yaml v0.7.3
[INFO] [stderr]  Documenting straw-boss v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: Could not document `straw-boss`.
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_from)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(plugin)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(option_replace)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name straw_boss 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-4e687082fc6f0c36.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-40f481de5a7b2e4a.rmeta --extern daemonize=/opt/rustwide/target/debug/deps/libdaemonize-df860cacf8d6ae5b.rmeta --extern duct=/opt/rustwide/target/debug/deps/libduct-ac74f14c83cc8e8a.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-4fe1b0696b5f7a3d.rmeta --extern failure_derive=/opt/rustwide/target/debug/deps/libfailure_derive-b3e5f4dddf938470.so --extern rmp_serde=/opt/rustwide/target/debug/deps/librmp_serde-8fd8f2682c274964.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-68d29a5c0d2f7839.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-7ae07b6dc1c9b95d.so --extern serde_yaml=/opt/rustwide/target/debug/deps/libserde_yaml-82269e82eb7eee5c.rmeta --extern shellwords=/opt/rustwide/target/debug/deps/libshellwords-c3aea99f6ca454f8.rmeta --extern sysinfo=/opt/rustwide/target/debug/deps/libsysinfo-ee9f85d19073ce7a.rmeta --cap-lints=warn` (exit code: 1)
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2e13e4db99112a5499bc9914ab7bcaa9296a25b1088dc229d16069412d4a2e59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e13e4db99112a5499bc9914ab7bcaa9296a25b1088dc229d16069412d4a2e59", kill_on_drop: false }`
[INFO] [stdout] 2e13e4db99112a5499bc9914ab7bcaa9296a25b1088dc229d16069412d4a2e59