[INFO] cloning repository https://github.com/andrew-d/lstrings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/andrew-d/lstrings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandrew-d%2Flstrings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandrew-d%2Flstrings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c2d63cee581a94ae9e67cf4aa5e80f855d50ee00
[INFO] documenting andrew-d/lstrings 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%2Fandrew-d%2Flstrings" "/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/andrew-d/lstrings 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/andrew-d/lstrings
[INFO] finished tweaking git repo https://github.com/andrew-d/lstrings
[INFO] tweaked toml for git repo https://github.com/andrew-d/lstrings written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/andrew-d/lstrings 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] error: the lock file /workspace/builds/worker-0/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/retep998/rust-mmap`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 00eb27a6fd0a1391015bd5efec1ad6d628cbeac1cbb22f8797ded9a420186984
[INFO] running `Command { std: "docker" "start" "-a" "00eb27a6fd0a1391015bd5efec1ad6d628cbeac1cbb22f8797ded9a420186984", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "00eb27a6fd0a1391015bd5efec1ad6d628cbeac1cbb22f8797ded9a420186984", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00eb27a6fd0a1391015bd5efec1ad6d628cbeac1cbb22f8797ded9a420186984", kill_on_drop: false }`
[INFO] [stdout] 00eb27a6fd0a1391015bd5efec1ad6d628cbeac1cbb22f8797ded9a420186984
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6f33331199616b1d59ca74839e469024835eac761ee6e6fa152a34dd86cc4ea8
[INFO] running `Command { std: "docker" "start" "-a" "6f33331199616b1d59ca74839e469024835eac761ee6e6fa152a34dd86cc4ea8", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking libc v0.1.12
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking mmap v0.1.1 (https://github.com/retep998/rust-mmap?rev=4617dd0901d6899faebfbc427714b89fcb889880#4617dd09)
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking fern v0.3.5
[INFO] [stderr]  Documenting lstrings v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `bincode::rustc_serialize`
[INFO] [stdout]   --> src/main.rs:14:14
[INFO] [stdout]    |
[INFO] [stdout] 14 | use bincode::rustc_serialize::decode;
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^ could not find `rustc_serialize` in `bincode`
[INFO] [stdout] 
[INFO] [stdout] 
[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(vec_resize)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `lstrings`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name lstrings 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 ansi_term=/opt/rustwide/target/debug/deps/libansi_term-a4535ac1495c8e48.rmeta --extern bincode=/opt/rustwide/target/debug/deps/libbincode-e3f65e822bed0bb8.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-5e80f06216331e5d.rmeta --extern fern=/opt/rustwide/target/debug/deps/libfern-13615db5ec6c376d.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-0c18a9a7e3816bae.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-1ad3ad1e20beb97f.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-538ccf74a4ec0a82.rmeta --extern mmap=/opt/rustwide/target/debug/deps/libmmap-be005c6d0e3d5468.rmeta --extern rustc_serialize=/opt/rustwide/target/debug/deps/librustc_serialize-0e355727854478f2.rmeta --extern time=/opt/rustwide/target/debug/deps/libtime-06a439cbf99d31a6.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "6f33331199616b1d59ca74839e469024835eac761ee6e6fa152a34dd86cc4ea8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f33331199616b1d59ca74839e469024835eac761ee6e6fa152a34dd86cc4ea8", kill_on_drop: false }`
[INFO] [stdout] 6f33331199616b1d59ca74839e469024835eac761ee6e6fa152a34dd86cc4ea8