[INFO] cloning repository https://github.com/roblabla42/KFS
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/roblabla42/KFS" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Froblabla42%2FKFS", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Froblabla42%2FKFS'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c42cf3f2efe2c3e96510200c78b5c12e2acea006
[INFO] documenting roblabla42/KFS against 1.54.0 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Froblabla42%2FKFS" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/roblabla42/KFS 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] removed /workspace/builds/worker-5/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/roblabla42/KFS
[INFO] finished tweaking git repo https://github.com/roblabla42/KFS
[INFO] tweaked toml for git repo https://github.com/roblabla42/KFS written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/roblabla42/KFS already has a lockfile, it will not be regenerated
[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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 9b94bc94514f951191db1ac3141330f6a3534adabfbb012032b6e6fe6eb3adcf
[INFO] running `Command { std: "docker" "start" "-a" "9b94bc94514f951191db1ac3141330f6a3534adabfbb012032b6e6fe6eb3adcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9b94bc94514f951191db1ac3141330f6a3534adabfbb012032b6e6fe6eb3adcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b94bc94514f951191db1ac3141330f6a3534adabfbb012032b6e6fe6eb3adcf", kill_on_drop: false }`
[INFO] [stdout] 9b94bc94514f951191db1ac3141330f6a3534adabfbb012032b6e6fe6eb3adcf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 350882ce55a5c2aeed95b907c3bed73bb0ab3dc60d0eb962ba5512c4e5d87fda
[INFO] running `Command { std: "docker" "start" "-a" "350882ce55a5c2aeed95b907c3bed73bb0ab3dc60d0eb962ba5512c4e5d87fda", 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]    Compiling libc v0.2.64 (https://github.com/sunriseos/libc.git?branch=sunrise#53c8be04)
[INFO] [stderr]    Compiling syn v0.15.40
[INFO] [stderr]    Compiling winapi v0.3.7
[INFO] [stderr]    Compiling nix v0.13.1
[INFO] [stderr]     Checking wild v2.0.2
[INFO] [stderr]     Checking data-encoding v2.1.2
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling ucd-trie v0.1.2
[INFO] [stderr]    Compiling maplit v1.0.1
[INFO] [stderr]    Compiling strsim v0.7.0
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]     Checking static_assertions v0.3.3
[INFO] [stderr]     Checking bit_field v0.10.0
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.16
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling cc v1.0.46
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking hashbrown v0.5.0
[INFO] [stderr]     Checking same-file v1.0.5
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]    Compiling proc-macro-hack v0.5.16
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling pkg-config v0.3.16
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]     Checking byte-tools v0.2.0
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]    Compiling proc-macro-hack-impl v0.4.2
[INFO] [stderr]    Compiling yes v0.0.1 (/opt/rustwide/workdir/coreutils/src/yes)
[INFO] [stderr]    Compiling test v0.0.1 (/opt/rustwide/workdir/coreutils/src/test)
[INFO] [stderr]    Compiling shuf v0.0.1 (/opt/rustwide/workdir/coreutils/src/shuf)
[INFO] [stderr]    Compiling od v0.0.1 (/opt/rustwide/workdir/coreutils/src/od)
[INFO] [stderr]    Compiling echo v0.0.1 (/opt/rustwide/workdir/coreutils/src/echo)
[INFO] [stderr]    Compiling mktemp v0.0.1 (/opt/rustwide/workdir/coreutils/src/mktemp)
[INFO] [stderr]    Compiling expr v0.0.1 (/opt/rustwide/workdir/coreutils/src/expr)
[INFO] [stderr]    Compiling uptime v0.0.1 (/opt/rustwide/workdir/coreutils/src/uptime)
[INFO] [stderr]    Compiling stat v0.0.1 (/opt/rustwide/workdir/coreutils/src/stat)
[INFO] [stderr]    Compiling seq v0.0.1 (/opt/rustwide/workdir/coreutils/src/seq)
[INFO] [stderr]    Compiling date v0.0.1 (/opt/rustwide/workdir/coreutils/src/date)
[INFO] [stderr]    Compiling nproc v0.0.1 (/opt/rustwide/workdir/coreutils/src/nproc)
[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/hashbrown-0.5.0/src/lib.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | /     feature(
[INFO] [stdout] 16 | |         alloc_layout_extra,
[INFO] [stdout] 17 | |         allocator_api,
[INFO] [stdout] 18 | |         ptr_offset_from,
[INFO] [stdout] ...  |
[INFO] [stdout] 21 | |         dropck_eyepatch
[INFO] [stdout] 22 | |     )
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling nohup v0.0.1 (/opt/rustwide/workdir/coreutils/src/nohup)
[INFO] [stderr]    Compiling pathchk v0.0.1 (/opt/rustwide/workdir/coreutils/src/pathchk)
[INFO] [stderr]    Compiling rm v0.0.1 (/opt/rustwide/workdir/coreutils/src/rm)
[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]    Compiling cp v0.0.1 (/opt/rustwide/workdir/coreutils/src/cp)
[INFO] [stderr] error: could not compile `hashbrown`
[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" "350882ce55a5c2aeed95b907c3bed73bb0ab3dc60d0eb962ba5512c4e5d87fda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "350882ce55a5c2aeed95b907c3bed73bb0ab3dc60d0eb962ba5512c4e5d87fda", kill_on_drop: false }`
[INFO] [stdout] 350882ce55a5c2aeed95b907c3bed73bb0ab3dc60d0eb962ba5512c4e5d87fda
