[INFO] cloning repository https://github.com/talglobus/snake
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/talglobus/snake" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftalglobus%2Fsnake", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftalglobus%2Fsnake'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 06510ce6d0bfb629531c5013ab8c26a317a6b55e
[INFO] documenting talglobus/snake 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%2Ftalglobus%2Fsnake" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/talglobus/snake 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/talglobus/snake
[INFO] finished tweaking git repo https://github.com/talglobus/snake
[INFO] tweaked toml for git repo https://github.com/talglobus/snake written to /workspace/builds/worker-10/source/Cargo.toml
[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] 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] [stdout] 6b2391fbc3e15b28b7b78ad8d66f08ec917fd1dbc1efe9478339c2f126cdaf6c
[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" "6b2391fbc3e15b28b7b78ad8d66f08ec917fd1dbc1efe9478339c2f126cdaf6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b2391fbc3e15b28b7b78ad8d66f08ec917fd1dbc1efe9478339c2f126cdaf6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b2391fbc3e15b28b7b78ad8d66f08ec917fd1dbc1efe9478339c2f126cdaf6c", kill_on_drop: false }`
[INFO] [stdout] 6b2391fbc3e15b28b7b78ad8d66f08ec917fd1dbc1efe9478339c2f126cdaf6c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] [stdout] 637aa81452d2cc9cbcebf4efa905c3249b447e12a5b921e77ad39052c4cc9ac8
[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" "637aa81452d2cc9cbcebf4efa905c3249b447e12a5b921e77ad39052c4cc9ac8", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking piston-float v0.3.0
[INFO] [stderr]     Checking shader_version v0.3.0
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]     Checking piston-texture v0.6.0
[INFO] [stderr]     Checking interpolation v0.1.0
[INFO] [stderr]     Checking read_color v1.0.0
[INFO] [stderr]     Checking piston-shaders_graphics2d v0.3.1
[INFO] [stderr]     Checking find_folder v0.3.0
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking owning_ref v0.4.1
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]    Compiling xml-rs v0.7.0
[INFO] [stderr]     Checking memmap v0.6.2
[INFO] [stderr]     Checking stb_truetype v0.3.1
[INFO] [stderr]     Checking deflate v0.7.20
[INFO] [stderr]     Checking num-integer v0.1.43
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking wayland-sys v0.20.12
[INFO] [stderr]     Checking piston-viewport v0.3.0
[INFO] [stderr]     Checking vecmath v0.3.1
[INFO] [stderr]     Checking ordered-float v0.5.2
[INFO] [stderr]     Checking lock_api v0.1.5
[INFO] [stderr]     Checking pistoncore-input v0.21.0
[INFO] [stderr]     Checking stb_truetype v0.2.8
[INFO] [stderr]     Checking wayland-commons v0.20.12
[INFO] [stderr]     Checking num-iter v0.1.41
[INFO] [stderr]    Compiling gl_generator v0.9.0
[INFO] [stderr]    Compiling wayland-scanner v0.20.12
[INFO] [stderr]     Checking png v0.12.0
[INFO] [stderr]     Checking rusttype v0.4.3
[INFO] [stderr]     Checking parking_lot_core v0.3.1
[INFO] [stderr]     Checking piston2d-graphics v0.26.0
[INFO] [stderr]    Compiling wayland-client v0.20.12
[INFO] [stderr]    Compiling wayland-protocols v0.20.12
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]    Compiling gfx_gl v0.5.0
[INFO] [stderr]    Compiling glutin v0.18.0
[INFO] [stderr]    Compiling gl v0.10.0
[INFO] [stderr]     Checking pistoncore-window v0.32.0
[INFO] [stderr]     Checking pistoncore-event_loop v0.37.0
[INFO] [stderr]     Checking piston v0.37.0
[INFO] [stderr]     Checking smithay-client-toolkit v0.3.0
[INFO] [stderr]    Compiling derivative v1.0.4
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]     Checking winit v0.17.2
[INFO] [stderr]     Checking gfx_core v0.8.3
[INFO] [stderr]     Checking tiff v0.2.2
[INFO] [stderr]     Checking image v0.20.1
[INFO] [stderr]     Checking pistoncore-glutin_window v0.48.0
[INFO] [stderr]     Checking gfx v0.17.1
[INFO] [stderr]     Checking gfx_device_gl v0.15.5
[INFO] [stderr]     Checking piston-gfx_texture v0.34.0
[INFO] [stderr]     Checking piston2d-gfx_graphics v0.52.0
[INFO] [stderr]     Checking piston_window v0.81.0
[INFO] [stderr]  Documenting snake v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `serde_derive`
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate serde_derive;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `snake`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name snake 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 find_folder=/opt/rustwide/target/debug/deps/libfind_folder-8e70b89ef01b65ac.rmeta --extern piston_window=/opt/rustwide/target/debug/deps/libpiston_window-71d3dbaedf6ed49e.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-d5ebcbb7c8cc870f.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-f3871106bff3dfa4.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "637aa81452d2cc9cbcebf4efa905c3249b447e12a5b921e77ad39052c4cc9ac8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "637aa81452d2cc9cbcebf4efa905c3249b447e12a5b921e77ad39052c4cc9ac8", kill_on_drop: false }`
[INFO] [stdout] 637aa81452d2cc9cbcebf4efa905c3249b447e12a5b921e77ad39052c4cc9ac8