[INFO] cloning repository https://github.com/tomc1998/rs-proc-gen-experiment
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tomc1998/rs-proc-gen-experiment" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomc1998%2Frs-proc-gen-experiment", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomc1998%2Frs-proc-gen-experiment'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cda6dfbc593366a9f339dbaa9ca484f8d97326d2
[INFO] documenting tomc1998/rs-proc-gen-experiment against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomc1998%2Frs-proc-gen-experiment" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tomc1998/rs-proc-gen-experiment on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tomc1998/rs-proc-gen-experiment
[INFO] finished tweaking git repo https://github.com/tomc1998/rs-proc-gen-experiment
[INFO] tweaked toml for git repo https://github.com/tomc1998/rs-proc-gen-experiment written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/tomc1998/rs-proc-gen-experiment already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wayland-commons v0.20.10
[INFO] [stderr]   Downloaded serde_yaml v0.7.5
[INFO] [stderr]   Downloaded specs v0.12.0
[INFO] [stderr]   Downloaded rand v0.5.3
[INFO] [stderr]   Downloaded core-foundation-sys v0.6.0
[INFO] [stderr]   Downloaded smithay-client-toolkit v0.2.4
[INFO] [stderr]   Downloaded wayland-client v0.20.10
[INFO] [stderr]   Downloaded rusttype v0.6.2
[INFO] [stderr]   Downloaded wayland-scanner v0.20.10
[INFO] [stderr]   Downloaded wayland-sys v0.20.10
[INFO] [stderr]   Downloaded core-foundation v0.6.0
[INFO] [stderr]   Downloaded x11-dl v2.18.1
[INFO] [stderr]   Downloaded glutin v0.16.0
[INFO] [stderr]   Downloaded gfx_window_glutin v0.24.0
[INFO] [stderr]   Downloaded winit v0.15.1
[INFO] [stderr]   Downloaded core-graphics v0.14.0
[INFO] [stderr]   Downloaded cocoa v0.15.0
[INFO] [stderr]   Downloaded wayland-protocols v0.20.10
[INFO] [stderr]   Downloaded approx v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f859e3f722b43974cd5a268da11b5f68359c6c2d58b0fc560fed73730187c305
[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" "f859e3f722b43974cd5a268da11b5f68359c6c2d58b0fc560fed73730187c305", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f859e3f722b43974cd5a268da11b5f68359c6c2d58b0fc560fed73730187c305", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f859e3f722b43974cd5a268da11b5f68359c6c2d58b0fc560fed73730187c305", kill_on_drop: false }`
[INFO] [stdout] f859e3f722b43974cd5a268da11b5f68359c6c2d58b0fc560fed73730187c305
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d2b2db2170e7cfd5b4fc5e8a6f7186071b2dec0c6df879792002789a7b92f041
[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" "d2b2db2170e7cfd5b4fc5e8a6f7186071b2dec0c6df879792002789a7b92f041", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]    Compiling cfg-if v0.1.4
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]     Checking stable_deref_trait v1.1.0
[INFO] [stderr]     Checking downcast-rs v1.0.3
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling nix v0.11.0
[INFO] [stderr]    Compiling cgmath v0.16.1
[INFO] [stderr]     Checking rustc-demangle v0.1.8
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking tuple_utils v0.2.0
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]    Compiling syn v0.10.8
[INFO] [stderr]     Checking log v0.4.3
[INFO] [stderr]     Checking draw_state v0.8.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.23
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]     Checking unreachable v0.1.1
[INFO] [stderr]     Checking stb_truetype v0.2.2
[INFO] [stderr]    Compiling x11-dl v2.18.1
[INFO] [stderr]     Checking yaml-rust v0.4.0
[INFO] [stderr]     Checking deflate v0.7.18
[INFO] [stderr]     Checking inflate v0.4.3
[INFO] [stderr]     Checking gif v0.10.0
[INFO] [stderr]    Compiling wayland-scanner v0.20.10
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking smallvec v0.6.3
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]    Compiling itertools v0.5.10
[INFO] [stderr]     Checking rand v0.5.3
[INFO] [stderr]     Checking osmesa-sys v0.1.2
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling gl_generator v0.9.0
[INFO] [stderr]    Compiling syn v0.12.15
[INFO] [stderr]    Compiling serde_derive v1.0.70
[INFO] [stderr]     Checking wayland-sys v0.20.10
[INFO] [stderr]     Checking parking_lot_core v0.2.14
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]     Checking serde_yaml v0.7.5
[INFO] [stderr]     Checking wayland-commons v0.20.10
[INFO] [stderr]     Checking rayon-core v1.4.0
[INFO] [stderr]     Checking parking_lot v0.5.5
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking approx v0.2.0
[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]     Checking ordered-float v0.5.0
[INFO] [stderr]    Compiling wayland-client v0.20.10
[INFO] [stderr]    Compiling wayland-protocols v0.20.10
[INFO] [stderr]    Compiling num-derive v0.2.2
[INFO] [stderr]     Checking rayon v1.0.1
[INFO] [stderr]     Checking num-iter v0.1.37
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking rusttype v0.6.2
[INFO] [stderr]     Checking png v0.12.0
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]    Compiling gfx_gl v0.5.0
[INFO] [stderr]    Compiling glutin v0.16.0
[INFO] [stderr]     Checking shred v0.7.0
[INFO] [stderr]     Checking hibitset v0.5.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling shred-derive v0.5.0
[INFO] [stderr]    Compiling failure_derive v0.1.1
[INFO] [stderr]    Compiling specs-derive v0.2.0
[INFO] [stderr]     Checking image v0.19.0
[INFO] [stderr]    Compiling derivative v1.0.0
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]     Checking smithay-client-toolkit v0.2.4
[INFO] [stderr]     Checking winit v0.15.1
[INFO] [stderr]     Checking gfx_core v0.8.2
[INFO] [stderr]     Checking shrev v1.0.1
[INFO] [stderr]     Checking specs v0.12.0
[INFO] [stderr]     Checking gfx_device_gl v0.15.3
[INFO] [stderr]     Checking gfx v0.17.1
[INFO] [stderr]     Checking gfx_window_glutin v0.24.0
[INFO] [stderr]  Documenting proc-gen-experiment 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(test)]
[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 `proc-gen-experiment`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name proc_gen_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 cgmath=/opt/rustwide/target/debug/deps/libcgmath-192de5a06afcbc42.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-83a2226ce22bb5b3.rmeta --extern failure_derive=/opt/rustwide/target/debug/deps/libfailure_derive-04a58c45a1084007.so --extern gfx=/opt/rustwide/target/debug/deps/libgfx-45b990d1c5fd1189.rmeta --extern gfx_device_gl=/opt/rustwide/target/debug/deps/libgfx_device_gl-6fa5ea4857d496b5.rmeta --extern gfx_gl=/opt/rustwide/target/debug/deps/libgfx_gl-cc009367ca34b0bf.rmeta --extern gfx_window_glutin=/opt/rustwide/target/debug/deps/libgfx_window_glutin-efa82ef26c1290af.rmeta --extern glutin=/opt/rustwide/target/debug/deps/libglutin-833dd9b7da0fe022.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-87451e46626ef771.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-ded5db976efdd62b.rmeta --extern num_integer=/opt/rustwide/target/debug/deps/libnum_integer-e169ae2ad2118947.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-31d8d2bb59e5c4da.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-13f140c3da9ca35b.rmeta --extern rusttype=/opt/rustwide/target/debug/deps/librusttype-6e2a6fa149ded8a7.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-e2c7117cdcbd0b5c.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-5791878a83b9ab28.so --extern serde_yaml=/opt/rustwide/target/debug/deps/libserde_yaml-2871d461dd8e4027.rmeta --extern specs=/opt/rustwide/target/debug/deps/libspecs-4fbc0a106e26e53c.rmeta --extern specs_derive=/opt/rustwide/target/debug/deps/libspecs_derive-29d9628dcc3f621e.so --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "d2b2db2170e7cfd5b4fc5e8a6f7186071b2dec0c6df879792002789a7b92f041", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2b2db2170e7cfd5b4fc5e8a6f7186071b2dec0c6df879792002789a7b92f041", kill_on_drop: false }`
[INFO] [stdout] d2b2db2170e7cfd5b4fc5e8a6f7186071b2dec0c6df879792002789a7b92f041