[INFO] cloning repository https://github.com/museun/a-mistake
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/museun/a-mistake" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuseun%2Fa-mistake", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuseun%2Fa-mistake'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 56d9199462b6ba88de454a94bb52c4926efe0f63
[INFO] documenting museun/a-mistake 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%2Fmuseun%2Fa-mistake" "/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/museun/a-mistake 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] started tweaking git repo https://github.com/museun/a-mistake
[INFO] finished tweaking git repo https://github.com/museun/a-mistake
[INFO] tweaked toml for git repo https://github.com/museun/a-mistake written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/museun/a-mistake 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] 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" "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] f6c559c94a2a54abee5b90ef4c3682b6181d97321fcd2ad04b47edc993a6a52f
[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" "f6c559c94a2a54abee5b90ef4c3682b6181d97321fcd2ad04b47edc993a6a52f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f6c559c94a2a54abee5b90ef4c3682b6181d97321fcd2ad04b47edc993a6a52f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6c559c94a2a54abee5b90ef4c3682b6181d97321fcd2ad04b47edc993a6a52f", kill_on_drop: false }`
[INFO] [stdout] f6c559c94a2a54abee5b90ef4c3682b6181d97321fcd2ad04b47edc993a6a52f
[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" "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] d201131482a8ff3cc618e0f069ef37dbe740fa177450754535f93235631f6181
[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" "d201131482a8ff3cc618e0f069ef37dbe740fa177450754535f93235631f6181", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.82
[INFO] [stderr]    Compiling openssl-sys v0.9.40
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling curl-sys v0.4.15
[INFO] [stderr]     Checking term v0.5.1
[INFO] [stderr]     Checking time v0.1.41
[INFO] [stderr]     Checking socket2 v0.3.8
[INFO] [stderr]    Compiling syn v0.15.23
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking simplelog v0.5.3
[INFO] [stderr]    Compiling serde_derive v1.0.82
[INFO] [stderr]     Checking curl v0.4.19
[INFO] [stderr]     Checking serde_json v1.0.33
[INFO] [stderr]  Documenting a-mistake 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(bind_by_move_pattern_guards)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `bind_by_move_pattern_guards` has been stable since 1.39.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `a-mistake`
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name a_mistake 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-b982e3f12fc9a9b3.rmeta --extern curl=/opt/rustwide/target/debug/deps/libcurl-7579d80ac8231cea.rmeta --extern indexmap=/opt/rustwide/target/debug/deps/libindexmap-fca2a568c2ac37c8.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-b52d93b6a5875b2a.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-6b8cd7c26b71a2fc.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-0b4adfd5bdeb6f75.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-e47390433e25db9b.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-dcc8b88073ddd7e1.rmeta --extern simplelog=/opt/rustwide/target/debug/deps/libsimplelog-d3d9345d7b8fce3b.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "d201131482a8ff3cc618e0f069ef37dbe740fa177450754535f93235631f6181", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d201131482a8ff3cc618e0f069ef37dbe740fa177450754535f93235631f6181", kill_on_drop: false }`
[INFO] [stdout] d201131482a8ff3cc618e0f069ef37dbe740fa177450754535f93235631f6181
