[INFO] fetching crate unix-tty 0.3.4...
[INFO] documenting unix-tty-0.3.4 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate unix-tty 0.3.4 into /workspace/builds/worker-66/source
[INFO] validating manifest of crates.io crate unix-tty 0.3.4 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate unix-tty 0.3.4
[INFO] finished tweaking crates.io crate unix-tty 0.3.4
[INFO] tweaked toml for crates.io crate unix-tty 0.3.4 written to /workspace/builds/worker-66/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a14ec46edd3cf867419863798e256601ad18780925f1dbd332e809c79695abe9
[INFO] running `Command { std: "docker" "start" "-a" "a14ec46edd3cf867419863798e256601ad18780925f1dbd332e809c79695abe9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a14ec46edd3cf867419863798e256601ad18780925f1dbd332e809c79695abe9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a14ec46edd3cf867419863798e256601ad18780925f1dbd332e809c79695abe9", kill_on_drop: false }`
[INFO] [stdout] a14ec46edd3cf867419863798e256601ad18780925f1dbd332e809c79695abe9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5bd496570e6d4025382ed7ae051d4077767873305caab71037fba75338123d6c
[INFO] running `Command { std: "docker" "start" "-a" "5bd496570e6d4025382ed7ae051d4077767873305caab71037fba75338123d6c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling ptr v0.2.3
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling hash-table v0.2.5
[INFO] [stderr]    Compiling containers v0.9.12
[INFO] [stderr]     Checking siphasher v0.2.3
[INFO] [stderr]     Checking abort v0.1.3
[INFO] [stderr]     Checking idem v0.4.0
[INFO] [stderr]    Compiling i-o v0.4.7
[INFO] [stderr]     Checking rel v0.2.0
[INFO] [stderr]     Checking heap v0.1.0
[INFO] [stderr]     Checking utf v0.1.6
[INFO] [stderr]     Checking libc-interface v0.1.2
[INFO] [stderr]     Checking system-call v0.1.3
[INFO] [stderr]     Checking flags v0.1.5
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking fallible v0.1.3
[INFO] [stderr]     Checking idem v0.1.1
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/system-call-0.1.3/src/lib.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(llvm_asm)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `system-call`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "5bd496570e6d4025382ed7ae051d4077767873305caab71037fba75338123d6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bd496570e6d4025382ed7ae051d4077767873305caab71037fba75338123d6c", kill_on_drop: false }`
[INFO] [stdout] 5bd496570e6d4025382ed7ae051d4077767873305caab71037fba75338123d6c
