[INFO] cloning repository https://github.com/stevebob/integer-physics-experiment
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/stevebob/integer-physics-experiment" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstevebob%2Finteger-physics-experiment", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstevebob%2Finteger-physics-experiment'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5de6dbc8ae67468e073443db63453d2c7b1a717d
[INFO] documenting stevebob/integer-physics-experiment 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%2Fstevebob%2Finteger-physics-experiment" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stevebob/integer-physics-experiment 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/stevebob/integer-physics-experiment
[INFO] finished tweaking git repo https://github.com/stevebob/integer-physics-experiment
[INFO] tweaked toml for git repo https://github.com/stevebob/integer-physics-experiment written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/stevebob/integer-physics-experiment 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 74aa1ec75614fe9943ffa1c770cc56ab93af1e72bad2afd25957cd0df23d2474
[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" "74aa1ec75614fe9943ffa1c770cc56ab93af1e72bad2afd25957cd0df23d2474", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "74aa1ec75614fe9943ffa1c770cc56ab93af1e72bad2afd25957cd0df23d2474", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74aa1ec75614fe9943ffa1c770cc56ab93af1e72bad2afd25957cd0df23d2474", kill_on_drop: false }`
[INFO] [stdout] 74aa1ec75614fe9943ffa1c770cc56ab93af1e72bad2afd25957cd0df23d2474
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] adae1c912c44ce57777279786c846a4dc9565e16554fd5cb0fe27da4c1024d3a
[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" "adae1c912c44ce57777279786c846a4dc9565e16554fd5cb0fe27da4c1024d3a", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.17
[INFO] [stderr]     Checking lazy_static v1.0.1
[INFO] [stderr]    Compiling num-bigint v0.2.0
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling serde v1.0.70
[INFO] [stderr]    Compiling num-complex v0.2.0
[INFO] [stderr]     Checking custom_derive v0.1.7
[INFO] [stderr]    Compiling log v0.4.3
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]    Compiling x11-dl v2.18.0
[INFO] [stderr]     Checking memmap v0.6.2
[INFO] [stderr]    Compiling proc-macro2 v0.4.6
[INFO] [stderr]     Checking shared_library v0.1.8
[INFO] [stderr]    Compiling newtype_derive v0.1.6
[INFO] [stderr]     Checking num-integer v0.1.39
[INFO] [stderr]     Checking osmesa-sys v0.1.2
[INFO] [stderr]     Checking gfx_core v0.8.2
[INFO] [stderr]    Compiling gl_generator v0.9.0
[INFO] [stderr]    Compiling quote v0.6.3
[INFO] [stderr]    Compiling syn v0.14.4
[INFO] [stderr]     Checking tempfile v3.0.2
[INFO] [stderr]     Checking cgmath v0.16.1
[INFO] [stderr]    Compiling libloading v0.5.0
[INFO] [stderr]    Compiling gfx_gl v0.5.0
[INFO] [stderr]    Compiling glutin v0.15.0
[INFO] [stderr]     Checking dlib v0.4.1
[INFO] [stderr]     Checking wayland-sys v0.12.5
[INFO] [stderr]     Checking wayland-client v0.12.5
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking wayland-protocols v0.12.5
[INFO] [stderr]     Checking wayland-kbd v0.13.1
[INFO] [stderr]     Checking gfx v0.17.1
[INFO] [stderr]    Compiling serde_derive v1.0.70
[INFO] [stderr]     Checking wayland-window v0.13.3
[INFO] [stderr]     Checking winit v0.13.1
[INFO] [stderr]     Checking gfx_device_gl v0.15.3
[INFO] [stderr]     Checking gfx_window_glutin v0.23.0
[INFO] [stderr]     Checking best v0.6.0
[INFO] [stderr]  Documenting integer-physics-experiment 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:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(nonzero)]
[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 `integer-physics-experiment`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name integer_physics_experiment 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 best=/opt/rustwide/target/debug/deps/libbest-ff8a31a302c06406.rmeta --extern cgmath=/opt/rustwide/target/debug/deps/libcgmath-39d02bce32288568.rmeta --extern custom_derive=/opt/rustwide/target/debug/deps/libcustom_derive-4d13b9954652019b.rmeta --extern fnv=/opt/rustwide/target/debug/deps/libfnv-7722d5952f112cf5.rmeta --extern gfx=/opt/rustwide/target/debug/deps/libgfx-c2b7ba4e34a8f1e1.rmeta --extern gfx_device_gl=/opt/rustwide/target/debug/deps/libgfx_device_gl-e284998b8699fe85.rmeta --extern gfx_window_glutin=/opt/rustwide/target/debug/deps/libgfx_window_glutin-03c5dd76709a38de.rmeta --extern glutin=/opt/rustwide/target/debug/deps/libglutin-2da5b8956f307705.rmeta --extern newtype_derive=/opt/rustwide/target/debug/deps/libnewtype_derive-c1eb31cd7c857a4c.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-65a8f9d4f40f52e7.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "adae1c912c44ce57777279786c846a4dc9565e16554fd5cb0fe27da4c1024d3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adae1c912c44ce57777279786c846a4dc9565e16554fd5cb0fe27da4c1024d3a", kill_on_drop: false }`
[INFO] [stdout] adae1c912c44ce57777279786c846a4dc9565e16554fd5cb0fe27da4c1024d3a