[INFO] cloning repository https://github.com/interruptinuse/fixext-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/interruptinuse/fixext-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Finterruptinuse%2Ffixext-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Finterruptinuse%2Ffixext-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 221b0377c1cb2924f2346d36ed05bc7a728333ac
[INFO] documenting interruptinuse/fixext-rs against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Finterruptinuse%2Ffixext-rs" "/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/interruptinuse/fixext-rs on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/interruptinuse/fixext-rs
[INFO] finished tweaking git repo https://github.com/interruptinuse/fixext-rs
[INFO] tweaked toml for git repo https://github.com/interruptinuse/fixext-rs written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/interruptinuse/fixext-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/interruptinuse/rust-magic`
[INFO] [stderr]     Updating git repository `https://github.com/interruptinuse/rust-magic-sys`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded shellwords v1.0.0
[INFO] [stderr]   Downloaded rustyline v5.0.4
[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" "+beta-2020-08-29" "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] c4447f086d93503e9a559b726316d76f9d5c19d82e6360e55c91d738c8ff4cd9
[INFO] running `Command { std: "docker" "start" "-a" "c4447f086d93503e9a559b726316d76f9d5c19d82e6360e55c91d738c8ff4cd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c4447f086d93503e9a559b726316d76f9d5c19d82e6360e55c91d738c8ff4cd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4447f086d93503e9a559b726316d76f9d5c19d82e6360e55c91d738c8ff4cd9", kill_on_drop: false }`
[INFO] [stdout] c4447f086d93503e9a559b726316d76f9d5c19d82e6360e55c91d738c8ff4cd9
[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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d9640c433fc4e345ac8ec058219aa5778dafe75ed92bc228ddd8e0907a859daa
[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" "d9640c433fc4e345ac8ec058219aa5778dafe75ed92bc228ddd8e0907a859daa", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling magic-sys v0.2.1 (https://github.com/interruptinuse/rust-magic-sys#0c20fce1)
[INFO] [stderr]    Compiling half v1.4.0
[INFO] [stderr]     Checking utf8parse v0.1.1
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking nix v0.14.1
[INFO] [stderr]     Checking shellwords v1.0.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking magic v0.12.2 (https://github.com/interruptinuse/rust-magic#8d38180e)
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]    Compiling regex v1.3.1
[INFO] [stderr]     Checking rustyline v5.0.4
[INFO] [stderr]    Compiling serde_derive v1.0.103
[INFO] [stderr]    Compiling serde v1.0.103
[INFO] [stderr]     Checking serde_cbor v0.10.2
[INFO] [stderr]    Compiling toml v0.5.5
[INFO] [stderr]    Compiling winres v0.1.11
[INFO] [stderr]    Compiling fixext v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting fixext v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> fixext.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(label_break_value)]
[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 `fixext`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name fixext fixext.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern ansi_term=/opt/rustwide/target/debug/deps/libansi_term-4180737bb07af6bb.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-11df263f3f7af3da.rmeta --extern magic=/opt/rustwide/target/debug/deps/libmagic-6dc3377da66a6c47.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-13b01f7cffee51ae.rmeta --extern rustyline=/opt/rustwide/target/debug/deps/librustyline-b86dfecbbbdfb13d.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-304e91a3f5e65392.rmeta --extern serde_cbor=/opt/rustwide/target/debug/deps/libserde_cbor-000efdc7ddb4209c.rmeta --extern shellwords=/opt/rustwide/target/debug/deps/libshellwords-35f04703c101a594.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "d9640c433fc4e345ac8ec058219aa5778dafe75ed92bc228ddd8e0907a859daa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9640c433fc4e345ac8ec058219aa5778dafe75ed92bc228ddd8e0907a859daa", kill_on_drop: false }`
[INFO] [stdout] d9640c433fc4e345ac8ec058219aa5778dafe75ed92bc228ddd8e0907a859daa