[INFO] fetching crate detour 0.8.1...
[INFO] documenting detour-0.8.1 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate detour 0.8.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate detour 0.8.1 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate detour 0.8.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate detour 0.8.1
[INFO] tweaked toml for crates.io crate detour 0.8.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate detour 0.8.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded region v2.2.0
[INFO] [stderr]   Downloaded mmap-fixed v0.1.5
[INFO] [stderr]   Downloaded slice-pool v0.4.1
[INFO] [stderr]   Downloaded libudis86-sys v0.2.1
[INFO] [stderr]   Downloaded mach v0.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7fee75aa4dce5a1a0eccb63073a5315ecf06bc45770a1ea83de1ac73dde856eb
[INFO] running `Command { std: "docker" "start" "-a" "7fee75aa4dce5a1a0eccb63073a5315ecf06bc45770a1ea83de1ac73dde856eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7fee75aa4dce5a1a0eccb63073a5315ecf06bc45770a1ea83de1ac73dde856eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7fee75aa4dce5a1a0eccb63073a5315ecf06bc45770a1ea83de1ac73dde856eb", kill_on_drop: false }`
[INFO] [stdout] 7fee75aa4dce5a1a0eccb63073a5315ecf06bc45770a1ea83de1ac73dde856eb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7bcb2a0666c8185eb8cd08957ebdd63e6c0669104f8bd93930862148bfe6cea4
[INFO] running `Command { std: "docker" "start" "-a" "7bcb2a0666c8185eb8cd08957ebdd63e6c0669104f8bd93930862148bfe6cea4", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking slice-pool v0.4.1
[INFO] [stderr]    Compiling libudis86-sys v0.2.1
[INFO] [stderr]     Checking mmap-fixed v0.1.5
[INFO] [stderr]     Checking region v2.2.0
[INFO] [stderr]  Documenting detour v0.8.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:4:3
[INFO] [stdout]   |
[INFO] [stdout] 4 |   feature(const_fn_trait_bound, unboxed_closures, abi_thiscall)
[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 `detour`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name detour src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="nightly"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern cfg_if=/opt/rustwide/target/debug/deps/libcfg_if-86cb6b55248c00db.rmeta --extern generic_array=/opt/rustwide/target/debug/deps/libgeneric_array-e6b019cdb61312b0.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-5e37eee3e84fafab.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-f64d9915b2967c75.rmeta --extern udis=/opt/rustwide/target/debug/deps/liblibudis86_sys-3fa362ef75c96397.rmeta --extern mmap=/opt/rustwide/target/debug/deps/libmmap_fixed-c59791434a8147e2.rmeta --extern region=/opt/rustwide/target/debug/deps/libregion-f2b39958ceb1f5cd.rmeta --extern slice_pool=/opt/rustwide/target/debug/deps/libslice_pool-ac3a83094484065a.rmeta --cap-lints=warn --crate-version 0.8.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "7bcb2a0666c8185eb8cd08957ebdd63e6c0669104f8bd93930862148bfe6cea4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7bcb2a0666c8185eb8cd08957ebdd63e6c0669104f8bd93930862148bfe6cea4", kill_on_drop: false }`
[INFO] [stdout] 7bcb2a0666c8185eb8cd08957ebdd63e6c0669104f8bd93930862148bfe6cea4
