[INFO] cloning repository https://github.com/mmrath/oms
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mmrath/oms" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmmrath%2Foms", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmmrath%2Foms'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 343d46322cacf79d84cf74b8ba6e3aaed506b63b
[INFO] documenting mmrath/oms 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%2Fmmrath%2Foms" "/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/mmrath/oms 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/mmrath/oms
[INFO] finished tweaking git repo https://github.com/mmrath/oms
[INFO] tweaked toml for git repo https://github.com/mmrath/oms written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/mmrath/oms 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-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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", 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] e792901d4eea5e7af4b4ad2c018b227b1108486ee98fda327c104430173a37e9
[INFO] running `Command { std: "docker" "start" "-a" "e792901d4eea5e7af4b4ad2c018b227b1108486ee98fda327c104430173a37e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e792901d4eea5e7af4b4ad2c018b227b1108486ee98fda327c104430173a37e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e792901d4eea5e7af4b4ad2c018b227b1108486ee98fda327c104430173a37e9", kill_on_drop: false }`
[INFO] [stdout] e792901d4eea5e7af4b4ad2c018b227b1108486ee98fda327c104430173a37e9
[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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 912c99bb86716051caca7ba32d9a1b74796a3ca2fd36fd317b0010297221efa6
[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" "912c99bb86716051caca7ba32d9a1b74796a3ca2fd36fd317b0010297221efa6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling cc v1.0.7
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking time v0.1.39
[INFO] [stderr]     Checking num-integer v0.1.36
[INFO] [stderr]    Compiling syn v0.12.14
[INFO] [stderr]     Checking csv-core v0.1.4
[INFO] [stderr]     Checking num-iter v0.1.35
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking csv v1.0.0-beta.5
[INFO] [stderr]     Checking chrono v0.4.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling serde_derive_internals v0.21.0
[INFO] [stderr]    Compiling serde_derive v1.0.33
[INFO] [stderr]     Checking backtrace v0.3.5
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]  Documenting oms v0.1.0 (/opt/rustwide/workdir)
[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(nll)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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(crate_in_paths)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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(crate_visibility_modifier)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(match_default_bindings)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 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 `oms`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name oms 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-6bb698a6db04f8d9.rmeta --extern csv=/opt/rustwide/target/debug/deps/libcsv-f15aa64270c6494e.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-0e8efe75e40cb40d.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-cf6de5a7670865a1.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-ae56432d29c25e31.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-88b67a87df9d291e.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-460130ac175c6d54.so --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "912c99bb86716051caca7ba32d9a1b74796a3ca2fd36fd317b0010297221efa6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "912c99bb86716051caca7ba32d9a1b74796a3ca2fd36fd317b0010297221efa6", kill_on_drop: false }`
[INFO] [stdout] 912c99bb86716051caca7ba32d9a1b74796a3ca2fd36fd317b0010297221efa6