[INFO] cloning repository https://github.com/Torrencem/addcomb-comp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Torrencem/addcomb-comp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTorrencem%2Faddcomb-comp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTorrencem%2Faddcomb-comp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4680e352214b8c7af857e361a801464e1c3f5ee3
[INFO] documenting Torrencem/addcomb-comp against 1.75.0 for beta-1.76-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTorrencem%2Faddcomb-comp" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Torrencem/addcomb-comp on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Torrencem/addcomb-comp
[INFO] finished tweaking git repo https://github.com/Torrencem/addcomb-comp
[INFO] tweaked toml for git repo https://github.com/Torrencem/addcomb-comp written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Torrencem/addcomb-comp already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded paste v0.1.6
[INFO] [stderr]   Downloaded paste-impl v0.1.6
[INFO] [stderr]   Downloaded cast v0.2.2
[INFO] [stderr]   Downloaded tinytemplate v1.0.2
[INFO] [stderr]   Downloaded once_cell v1.3.0
[INFO] [stderr]   Downloaded rand_os v0.2.2
[INFO] [stderr]   Downloaded rand_xoshiro v0.3.1
[INFO] [stderr]   Downloaded criterion v0.3.0
[INFO] [stderr]   Downloaded criterion-plot v0.4.0
[INFO] [stderr]   Downloaded specialize v0.0.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f8a7e23790a172e2dc7d203147a17b2fdf1008b53909cbded116ab71ae2031e8
[INFO] running `Command { std: "docker" "start" "-a" "f8a7e23790a172e2dc7d203147a17b2fdf1008b53909cbded116ab71ae2031e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f8a7e23790a172e2dc7d203147a17b2fdf1008b53909cbded116ab71ae2031e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8a7e23790a172e2dc7d203147a17b2fdf1008b53909cbded116ab71ae2031e8", kill_on_drop: false }`
[INFO] [stdout] f8a7e23790a172e2dc7d203147a17b2fdf1008b53909cbded116ab71ae2031e8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTFLAGS=--cap-lints=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ec5c6d7bb2dc1536b55b866fdd70d552d88cd2f1aa95c0a353b0dd9cf6a4c959
[INFO] running `Command { std: "docker" "start" "-a" "ec5c6d7bb2dc1536b55b866fdd70d552d88cd2f1aa95c0a353b0dd9cf6a4c959", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.8
[INFO] [stderr]     Checking either v1.5.2
[INFO] [stderr]     Checking specialize v0.0.3
[INFO] [stderr]     Checking once_cell v1.3.0
[INFO] [stderr]     Checking array_tool v1.0.3
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling paste-impl v0.1.6
[INFO] [stderr]     Checking paste v0.1.6
[INFO] [stderr]  Documenting addcomb_comp v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(specialization)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(specialization)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]   = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `addcomb_comp`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2018 --crate-type rlib --crate-type dylib --crate-name addcomb_comp src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=63922191e859cbac -L dependency=/opt/rustwide/target/debug/deps --extern array_tool=/opt/rustwide/target/debug/deps/libarray_tool-de96a83eda5ca156.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-e89773ead9bbafaf.rmeta --extern once_cell=/opt/rustwide/target/debug/deps/libonce_cell-70e30b885e0026e2.rmeta --extern paste=/opt/rustwide/target/debug/deps/libpaste-baca7bfea43981a5.rmeta --extern specialize=/opt/rustwide/target/debug/deps/libspecialize-83274c3fb3033f7b.rmeta --cap-lints=warn --crate-version 0.1.5` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "ec5c6d7bb2dc1536b55b866fdd70d552d88cd2f1aa95c0a353b0dd9cf6a4c959", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec5c6d7bb2dc1536b55b866fdd70d552d88cd2f1aa95c0a353b0dd9cf6a4c959", kill_on_drop: false }`
[INFO] [stdout] ec5c6d7bb2dc1536b55b866fdd70d552d88cd2f1aa95c0a353b0dd9cf6a4c959
