[INFO] cloning repository https://github.com/donkebap/tcfinder
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/donkebap/tcfinder" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdonkebap%2Ftcfinder", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdonkebap%2Ftcfinder'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 33541e11966b8b1283340f0d9603b630efb56271
[INFO] documenting donkebap/tcfinder 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%2Fdonkebap%2Ftcfinder" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/donkebap/tcfinder 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/donkebap/tcfinder
[INFO] finished tweaking git repo https://github.com/donkebap/tcfinder
[INFO] tweaked toml for git repo https://github.com/donkebap/tcfinder written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/donkebap/tcfinder 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]  Downloading crates ...
[INFO] [stderr]   Downloaded pbr v1.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] d2f0c98be7c3c5969de3e0d29c24c707b4f22e12ecf1f0f7f17102a41057fe0d
[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" "d2f0c98be7c3c5969de3e0d29c24c707b4f22e12ecf1f0f7f17102a41057fe0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2f0c98be7c3c5969de3e0d29c24c707b4f22e12ecf1f0f7f17102a41057fe0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2f0c98be7c3c5969de3e0d29c24c707b4f22e12ecf1f0f7f17102a41057fe0d", kill_on_drop: false }`
[INFO] [stdout] d2f0c98be7c3c5969de3e0d29c24c707b4f22e12ecf1f0f7f17102a41057fe0d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 36e636157e1ff6876311c34f55404092b1814e132bd9040201853f1ccba39a4a
[INFO] running `Command { std: "docker" "start" "-a" "36e636157e1ff6876311c34f55404092b1814e132bd9040201853f1ccba39a4a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.55
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling num-complex v0.2.1
[INFO] [stderr]    Compiling serde v1.0.91
[INFO] [stderr]    Compiling regex v1.1.6
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling cc v1.0.37
[INFO] [stderr]     Checking utf8-ranges v1.0.2
[INFO] [stderr]     Checking strsim v0.9.2
[INFO] [stderr]     Checking regex-syntax v0.6.6
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking num_cpus v1.10.0
[INFO] [stderr]     Checking threadpool v1.7.1
[INFO] [stderr]    Compiling tcfinder v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking pbr v1.0.1
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.91
[INFO] [stderr]     Checking docopt v1.1.0
[INFO] [stderr]  Documenting tcfinder v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(plugin, test, simd_ffi, repr_simd)]
[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 `tcfinder`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name tcfinder 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 docopt=/opt/rustwide/target/debug/deps/libdocopt-da2320f7d0cc8856.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-d6f55168c1c72fe7.rmeta --extern pbr=/opt/rustwide/target/debug/deps/libpbr-ad19acb35906c4bd.rmeta --extern crypto=/opt/rustwide/target/debug/deps/libcrypto-93d92416fbf83671.rmeta --extern rustc_serialize=/opt/rustwide/target/debug/deps/librustc_serialize-eddfb9427ca0b1f2.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-652bd955843ff6f2.rmeta --extern threadpool=/opt/rustwide/target/debug/deps/libthreadpool-7ab98fc6bd5b7ba4.rmeta --extern time=/opt/rustwide/target/debug/deps/libtime-4d8a999541e2a0fc.rmeta --cap-lints=warn --crate-version 0.1.1` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "36e636157e1ff6876311c34f55404092b1814e132bd9040201853f1ccba39a4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36e636157e1ff6876311c34f55404092b1814e132bd9040201853f1ccba39a4a", kill_on_drop: false }`
[INFO] [stdout] 36e636157e1ff6876311c34f55404092b1814e132bd9040201853f1ccba39a4a