[INFO] fetching crate tty 0.5.0...
[INFO] documenting tty-0.5.0 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate tty 0.5.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate tty 0.5.0 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tty 0.5.0
[INFO] finished tweaking crates.io crate tty 0.5.0
[INFO] tweaked toml for crates.io crate tty 0.5.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bit-set v0.2.0
[INFO] [stderr]   Downloaded chan-signal v0.1.7
[INFO] [stderr]   Downloaded fd v0.2.3
[INFO] [stderr]   Downloaded lazy_static v0.1.16
[INFO] [stderr]   Downloaded chan v0.1.23
[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" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0af050e7ab1e1024adce2917215d22539041ce12ca3660cb56a4b574be6bd0f3
[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" "0af050e7ab1e1024adce2917215d22539041ce12ca3660cb56a4b574be6bd0f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0af050e7ab1e1024adce2917215d22539041ce12ca3660cb56a4b574be6bd0f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0af050e7ab1e1024adce2917215d22539041ce12ca3660cb56a4b574be6bd0f3", kill_on_drop: false }`
[INFO] [stdout] 0af050e7ab1e1024adce2917215d22539041ce12ca3660cb56a4b574be6bd0f3
[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" "+beta-2020-10-09" "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] ecb7c0869eab8c9eb64076d357c23ed4635e0a47e10c7e2b7bce65af82c1aa2e
[INFO] running `Command { std: "docker" "start" "-a" "ecb7c0869eab8c9eb64076d357c23ed4635e0a47e10c7e2b7bce65af82c1aa2e", kill_on_drop: false }`
[INFO] [stderr]     Checking bit-vec v0.6.2
[INFO] [stderr]     Checking fd v0.2.3
[INFO] [stderr]     Checking chan v0.1.23
[INFO] [stderr]     Checking bit-set v0.2.0
[INFO] [stderr]     Checking chan-signal v0.1.7
[INFO] [stderr]  Documenting tty v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(process_exec)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `tty`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name tty 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 chan=/opt/rustwide/target/debug/deps/libchan-e683895625a9ee87.rmeta --extern chan_signal=/opt/rustwide/target/debug/deps/libchan_signal-b830412913d64384.rmeta --extern fd=/opt/rustwide/target/debug/deps/libfd-18fa413334c1ba00.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-82c6b0e33b42e760.rmeta --extern termios=/opt/rustwide/target/debug/deps/libtermios-f678c95ff742bbc6.rmeta --cap-lints=warn --crate-version 0.5.0` (exit code: 1)
[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] running `Command { std: "docker" "inspect" "ecb7c0869eab8c9eb64076d357c23ed4635e0a47e10c7e2b7bce65af82c1aa2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ecb7c0869eab8c9eb64076d357c23ed4635e0a47e10c7e2b7bce65af82c1aa2e", kill_on_drop: false }`
[INFO] [stdout] ecb7c0869eab8c9eb64076d357c23ed4635e0a47e10c7e2b7bce65af82c1aa2e
