[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 1.46.0 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-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/interruptinuse/fixext-rs 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/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-0/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" "+1.46.0" "fetch" "--locked" "--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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] [stdout] d433af48e891192781802b611b0dbd3875c1112bff846389a6119729b466661c
[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" "d433af48e891192781802b611b0dbd3875c1112bff846389a6119729b466661c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d433af48e891192781802b611b0dbd3875c1112bff846389a6119729b466661c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d433af48e891192781802b611b0dbd3875c1112bff846389a6119729b466661c", kill_on_drop: false }`
[INFO] [stdout] d433af48e891192781802b611b0dbd3875c1112bff846389a6119729b466661c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 29720787ff3f0255344ae24463fb07a16a21d01ac051147f34011f29359c079d
[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" "29720787ff3f0255344ae24463fb07a16a21d01ac051147f34011f29359c079d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling serde v1.0.103
[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]    Compiling glob v0.3.0
[INFO] [stderr]     Checking utf8parse v0.1.1
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking nix v0.14.1
[INFO] [stderr]     Checking atty v0.2.13
[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 serde_derive v1.0.103
[INFO] [stderr]     Checking rustyline v5.0.4
[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 stable 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-a4535ac1495c8e48.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-d1a8e402acd7df78.rmeta --extern magic=/opt/rustwide/target/debug/deps/libmagic-207ab767e03fdf65.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-ef03d8c34c9cc7a6.rmeta --extern rustyline=/opt/rustwide/target/debug/deps/librustyline-288b2a963f708187.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-c2ceaedb4a8e5fd2.rmeta --extern serde_cbor=/opt/rustwide/target/debug/deps/libserde_cbor-fe4b281dff1f19ed.rmeta --extern shellwords=/opt/rustwide/target/debug/deps/libshellwords-7d41b815eaf614ef.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "29720787ff3f0255344ae24463fb07a16a21d01ac051147f34011f29359c079d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29720787ff3f0255344ae24463fb07a16a21d01ac051147f34011f29359c079d", kill_on_drop: false }`
[INFO] [stdout] 29720787ff3f0255344ae24463fb07a16a21d01ac051147f34011f29359c079d