[INFO] cloning repository https://github.com/maufl/notrust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/maufl/notrust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaufl%2Fnotrust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaufl%2Fnotrust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0efd1b04bf2b4428e8ec652d655b0ec33a9c7579
[INFO] documenting maufl/notrust against 1.47.0 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaufl%2Fnotrust" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/maufl/notrust on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/maufl/notrust
[INFO] finished tweaking git repo https://github.com/maufl/notrust
[INFO] tweaked toml for git repo https://github.com/maufl/notrust written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/maufl/notrust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2b432a6634cca004bb1d681f699f61429767563143bce6a5f2b15d966aa74f11
[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" "2b432a6634cca004bb1d681f699f61429767563143bce6a5f2b15d966aa74f11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b432a6634cca004bb1d681f699f61429767563143bce6a5f2b15d966aa74f11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b432a6634cca004bb1d681f699f61429767563143bce6a5f2b15d966aa74f11", kill_on_drop: false }`
[INFO] [stdout] 2b432a6634cca004bb1d681f699f61429767563143bce6a5f2b15d966aa74f11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0fdd2a7289878d4376f508f6e6315cb4b05650dd7c669733b97faa8d888bcffa
[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" "0fdd2a7289878d4376f508f6e6315cb4b05650dd7c669733b97faa8d888bcffa", 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]     Checking smallvec v0.6.12
[INFO] [stderr]    Compiling syn v1.0.7
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]     Checking scopeguard v0.1.2
[INFO] [stderr]     Checking bit-vec v0.5.1
[INFO] [stderr]     Checking variance v0.1.3
[INFO] [stderr]     Checking sequence_trie v0.0.13
[INFO] [stderr]     Checking quoted_printable v0.4.1
[INFO] [stderr]     Checking census v0.2.0
[INFO] [stderr]     Checking itertools v0.8.1
[INFO] [stderr]     Checking num_cpus v1.11.0
[INFO] [stderr]    Compiling memoffset v0.5.2
[INFO] [stderr]     Checking num_cpus v0.2.13
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking inotify-sys v0.1.3
[INFO] [stderr]     Checking filetime v0.2.7
[INFO] [stderr]     Checking fs2 v0.4.3
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking crossbeam-epoch v0.6.1
[INFO] [stderr]     Checking fst v0.3.5
[INFO] [stderr]     Checking murmurhash32 v0.2.0
[INFO] [stderr]     Checking snap v0.2.5
[INFO] [stderr]     Checking combine v3.8.1
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking scoped-pool v1.0.0
[INFO] [stderr]     Checking unicode-normalization v0.1.9
[INFO] [stderr]     Checking charset v0.1.2
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking hpack v0.2.0
[INFO] [stderr]     Checking parking_lot_core v0.3.1
[INFO] [stderr]     Checking num-integer v0.1.41
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking mio-extras v2.0.5
[INFO] [stderr]     Checking inotify v0.6.1
[INFO] [stderr]     Checking fail v0.3.0
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking bit-set v0.5.1
[INFO] [stderr]     Checking serde_json v0.8.6
[INFO] [stderr]     Checking atomicwrites v0.2.5
[INFO] [stderr]     Checking mailparse v0.8.2
[INFO] [stderr]     Checking solicit v0.4.4
[INFO] [stderr]     Checking levenshtein_automata v0.1.1
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]     Checking bitpacking v0.8.1
[INFO] [stderr]     Checking chrono v0.4.9
[INFO] [stderr]     Checking notify v4.0.14
[INFO] [stderr]     Checking maildir v0.3.1
[INFO] [stderr]     Checking tantivy-fst v0.1.0
[INFO] [stderr]     Checking once_cell v0.2.4
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking crossbeam-deque v0.6.3
[INFO] [stderr]     Checking crossbeam v0.5.0
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking cookie v0.2.5
[INFO] [stderr]     Checking hyper v0.9.18
[INFO] [stderr]     Checking iron v0.4.0
[INFO] [stderr]     Checking persistent v0.2.1
[INFO] [stderr]     Checking mount v0.2.1
[INFO] [stderr]     Checking staticfile v0.3.1
[INFO] [stderr]     Checking bodyparser v0.4.1
[INFO] [stderr]     Checking urlencoded v0.4.1
[INFO] [stderr]    Compiling synstructure v0.12.1
[INFO] [stderr]    Compiling rental-impl v0.5.5
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking rust-stemmers v1.1.0
[INFO] [stderr]     Checking rental v0.5.5
[INFO] [stderr]     Checking owned-read v0.4.0
[INFO] [stderr]     Checking tantivy v0.10.2
[INFO] [stderr]  Documenting mailindexer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(option_result_contains)]
[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 `mailindexer`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name mailindexer 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 chrono=/opt/rustwide/target/debug/deps/libchrono-95de56e937fe0962.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-3edbd754c80bec9e.rmeta --extern iron=/opt/rustwide/target/debug/deps/libiron-3bd1f064fe5b00aa.rmeta --extern maildir=/opt/rustwide/target/debug/deps/libmaildir-d4ad80e8b8e47bb5.rmeta --extern mailparse=/opt/rustwide/target/debug/deps/libmailparse-775112e29cc8279a.rmeta --extern mount=/opt/rustwide/target/debug/deps/libmount-3bd8bd411f77ebbe.rmeta --extern persistent=/opt/rustwide/target/debug/deps/libpersistent-e73a0ba8e1387a59.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-ecafb5933d6606ad.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-b7d645f072ac095a.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-719ccaa22c369ce9.rmeta --extern staticfile=/opt/rustwide/target/debug/deps/libstaticfile-2c2b80cfdcc03d59.rmeta --extern tantivy=/opt/rustwide/target/debug/deps/libtantivy-79cb2269bf10efdd.rmeta --extern urlencoded=/opt/rustwide/target/debug/deps/liburlencoded-78c76fdd3897e1fd.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "0fdd2a7289878d4376f508f6e6315cb4b05650dd7c669733b97faa8d888bcffa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fdd2a7289878d4376f508f6e6315cb4b05650dd7c669733b97faa8d888bcffa", kill_on_drop: false }`
[INFO] [stdout] 0fdd2a7289878d4376f508f6e6315cb4b05650dd7c669733b97faa8d888bcffa
