[INFO] cloning repository https://github.com/stefan-k/funnel
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/stefan-k/funnel" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstefan-k%2Ffunnel", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstefan-k%2Ffunnel'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] aaaed45fb4d962a2bf6a95b6ebfcbb55f4eaff7f
[INFO] documenting stefan-k/funnel 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%2Fstefan-k%2Ffunnel" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stefan-k/funnel 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/stefan-k/funnel
[INFO] finished tweaking git repo https://github.com/stefan-k/funnel
[INFO] tweaked toml for git repo https://github.com/stefan-k/funnel written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/stefan-k/funnel 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a5b85b958e32efcdfc690161d9d8d2e8f7b59cf2cf90558a2f5809a8560b898a
[INFO] running `Command { std: "docker" "start" "-a" "a5b85b958e32efcdfc690161d9d8d2e8f7b59cf2cf90558a2f5809a8560b898a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a5b85b958e32efcdfc690161d9d8d2e8f7b59cf2cf90558a2f5809a8560b898a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5b85b958e32efcdfc690161d9d8d2e8f7b59cf2cf90558a2f5809a8560b898a", kill_on_drop: false }`
[INFO] [stdout] a5b85b958e32efcdfc690161d9d8d2e8f7b59cf2cf90558a2f5809a8560b898a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 75e75870c4d53c96fb4785ce0ba68a1032536c832f4043a33258225b3be0b6bd
[INFO] running `Command { std: "docker" "start" "-a" "75e75870c4d53c96fb4785ce0ba68a1032536c832f4043a33258225b3be0b6bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.29
[INFO] [stderr]    Compiling libc v0.2.50
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling cc v1.0.31
[INFO] [stderr]    Compiling slog v2.4.1
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling backtrace v0.3.14
[INFO] [stderr]    Compiling quote v0.6.11
[INFO] [stderr]     Checking term v0.5.1
[INFO] [stderr]    Compiling shellwords v1.0.0
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]     Checking slog-async v2.3.0
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking isatty v0.1.9
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]     Checking shellfn-core v0.1.1
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking slog-term v2.4.0
[INFO] [stderr]    Compiling darling_core v0.8.6
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling darling_macro v0.8.6
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]    Compiling darling v0.8.6
[INFO] [stderr]    Compiling shellfn-attribute v0.1.1
[INFO] [stderr]     Checking shellfn v0.1.1
[INFO] [stderr]  Documenting funnel v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/main.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![feature(never_type)]
[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 `funnel`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name funnel src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern failure=/opt/rustwide/target/debug/deps/libfailure-ef01efc48b679ddd.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-09be1e3f269d05b8.rmeta --extern shellfn=/opt/rustwide/target/debug/deps/libshellfn-160a38553e06c154.rmeta --extern slog=/opt/rustwide/target/debug/deps/libslog-40b4af9ac0ef7d14.rmeta --extern slog_async=/opt/rustwide/target/debug/deps/libslog_async-73904170357ea2cd.rmeta --extern slog_term=/opt/rustwide/target/debug/deps/libslog_term-98e97e8291e18876.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "75e75870c4d53c96fb4785ce0ba68a1032536c832f4043a33258225b3be0b6bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75e75870c4d53c96fb4785ce0ba68a1032536c832f4043a33258225b3be0b6bd", kill_on_drop: false }`
[INFO] [stdout] 75e75870c4d53c96fb4785ce0ba68a1032536c832f4043a33258225b3be0b6bd