[INFO] cloning repository https://github.com/jkcclemens/travis_ssh_deploy
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jkcclemens/travis_ssh_deploy" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjkcclemens%2Ftravis_ssh_deploy", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjkcclemens%2Ftravis_ssh_deploy'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 35c5b65e1f3e42a4ab529ff0baa052a697ff0bb6
[INFO] documenting jkcclemens/travis_ssh_deploy 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%2Fjkcclemens%2Ftravis_ssh_deploy" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jkcclemens/travis_ssh_deploy 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/jkcclemens/travis_ssh_deploy
[INFO] finished tweaking git repo https://github.com/jkcclemens/travis_ssh_deploy
[INFO] tweaked toml for git repo https://github.com/jkcclemens/travis_ssh_deploy written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/jkcclemens/travis_ssh_deploy 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 8e30d2c0f01b114b1c575450b19d00f13df97516fddd2e3972653f835ffc7053
[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" "8e30d2c0f01b114b1c575450b19d00f13df97516fddd2e3972653f835ffc7053", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8e30d2c0f01b114b1c575450b19d00f13df97516fddd2e3972653f835ffc7053", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e30d2c0f01b114b1c575450b19d00f13df97516fddd2e3972653f835ffc7053", kill_on_drop: false }`
[INFO] [stdout] 8e30d2c0f01b114b1c575450b19d00f13df97516fddd2e3972653f835ffc7053
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 9c990afc7aea1cbb4e17421e764f83d94d2d76ebcd61e375fc3fff95b83fe788
[INFO] running `Command { std: "docker" "start" "-a" "9c990afc7aea1cbb4e17421e764f83d94d2d76ebcd61e375fc3fff95b83fe788", 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] [stderr]     Checking libc v0.2.39
[INFO] [stderr]    Compiling cc v1.0.9
[INFO] [stderr]    Compiling build_const v0.2.0
[INFO] [stderr]     Checking rustc-demangle v0.1.7
[INFO] [stderr]     Checking num-traits v0.2.2
[INFO] [stderr]     Checking linked-hash-map v0.5.1
[INFO] [stderr]     Checking remove_dir_all v0.5.0
[INFO] [stderr]     Checking serde v1.0.34
[INFO] [stderr]     Checking integer-encoding v1.0.5
[INFO] [stderr]     Checking byteorder v1.2.1
[INFO] [stderr]    Compiling proc-macro2 v0.2.3
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling crc v1.7.0
[INFO] [stderr]     Checking yaml-rust v0.4.0
[INFO] [stderr]    Compiling quote v0.4.2
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]    Compiling syn v0.12.14
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]    Compiling failure_derive v0.1.1
[INFO] [stderr]    Compiling serde_derive_internals v0.22.0
[INFO] [stderr]    Compiling serde_derive v1.0.34
[INFO] [stderr]     Checking serde_yaml v0.7.3
[INFO] [stderr]     Checking backtrace v0.3.5
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]  Documenting travis_ssh_deploy v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/bin/send.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(termination_trait, process_exitcode_placeholder)]
[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 `travis_ssh_deploy`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name send src/bin/send.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-8148b3c9ce3924d5.rmeta --extern crc=/opt/rustwide/target/debug/deps/libcrc-690c0243e7107d22.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-29f1d2ee3071288d.rmeta --extern integer_encoding=/opt/rustwide/target/debug/deps/libinteger_encoding-5c9df36f89fb6cb9.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-7c7d0ec6d3ac1827.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-68cb45ce4ba3ffde.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-bc79a2b2607d4afa.so --extern serde_yaml=/opt/rustwide/target/debug/deps/libserde_yaml-96b3c8b94b750a80.rmeta --extern tempdir=/opt/rustwide/target/debug/deps/libtempdir-b68604750667add9.rmeta --cap-lints=warn` (exit code: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/bin/receive.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(termination_trait, process_exitcode_placeholder)]
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "9c990afc7aea1cbb4e17421e764f83d94d2d76ebcd61e375fc3fff95b83fe788", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c990afc7aea1cbb4e17421e764f83d94d2d76ebcd61e375fc3fff95b83fe788", kill_on_drop: false }`
[INFO] [stdout] 9c990afc7aea1cbb4e17421e764f83d94d2d76ebcd61e375fc3fff95b83fe788