[INFO] cloning repository https://github.com/jade-guiton/cantan
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jade-guiton/cantan" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjade-guiton%2Fcantan", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjade-guiton%2Fcantan'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2574d349f05523a07a859bf44d20764085b86be0
[INFO] documenting jade-guiton/cantan against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjade-guiton%2Fcantan" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jade-guiton/cantan on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jade-guiton/cantan
[INFO] finished tweaking git repo https://github.com/jade-guiton/cantan
[INFO] tweaked toml for git repo https://github.com/jade-guiton/cantan written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/jade-guiton/cantan already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded gc-arena-derive v0.2.0
[INFO] [stderr]   Downloaded gc-arena v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e64621be79f90256f4321341a1d62d642ded0ccd1a91c401202b295cd4defe9f
[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" "e64621be79f90256f4321341a1d62d642ded0ccd1a91c401202b295cd4defe9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e64621be79f90256f4321341a1d62d642ded0ccd1a91c401202b295cd4defe9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e64621be79f90256f4321341a1d62d642ded0ccd1a91c401202b295cd4defe9f", kill_on_drop: false }`
[INFO] [stdout] e64621be79f90256f4321341a1d62d642ded0ccd1a91c401202b295cd4defe9f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4d77799ca50d56c69cdedf8b8b611dc093ba1d68c52100dc353986584c96a8b5
[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" "4d77799ca50d56c69cdedf8b8b611dc093ba1d68c52100dc353986584c96a8b5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.20
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]    Compiling peg-runtime v0.6.3
[INFO] [stderr]     Checking unicode-xid v0.2.1
[INFO] [stderr]     Checking ordered-float v2.0.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling peg-macros v0.6.3
[INFO] [stderr]     Checking dirs-sys-next v0.1.0
[INFO] [stderr]     Checking dirs-next v1.0.1
[INFO] [stderr]     Checking peg v0.6.3
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling gc-arena-derive v0.2.0
[INFO] [stderr]     Checking rustyline v6.3.0
[INFO] [stderr]     Checking gc-arena v0.2.0
[INFO] [stderr]  Documenting cantan v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(trait_alias)]
[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 `cantan`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name cantan 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 gc_arena=/opt/rustwide/target/debug/deps/libgc_arena-d9a24e5b70e2d691.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-b5dbcc2daa2e7df6.rmeta --extern once_cell=/opt/rustwide/target/debug/deps/libonce_cell-c30ce74baffcb5b9.rmeta --extern ordered_float=/opt/rustwide/target/debug/deps/libordered_float-82bd4d5794eb75c8.rmeta --extern peg=/opt/rustwide/target/debug/deps/libpeg-15087374c62a5cb7.rmeta --extern rustyline=/opt/rustwide/target/debug/deps/librustyline-74da5013242e95c6.rmeta --extern unicode_segmentation=/opt/rustwide/target/debug/deps/libunicode_segmentation-f1af86579b1650db.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-169a4c7794daf4d4.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "4d77799ca50d56c69cdedf8b8b611dc093ba1d68c52100dc353986584c96a8b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d77799ca50d56c69cdedf8b8b611dc093ba1d68c52100dc353986584c96a8b5", kill_on_drop: false }`
[INFO] [stdout] 4d77799ca50d56c69cdedf8b8b611dc093ba1d68c52100dc353986584c96a8b5
