[INFO] fetching crate wtf-rlsr 1.1.1...
[INFO] documenting wtf-rlsr-1.1.1 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate wtf-rlsr 1.1.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate wtf-rlsr 1.1.1 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 wtf-rlsr 1.1.1
[INFO] finished tweaking crates.io crate wtf-rlsr 1.1.1
[INFO] tweaked toml for crates.io crate wtf-rlsr 1.1.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate wtf-rlsr 1.1.1 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]  Downloading crates ...
[INFO] [stderr]   Downloaded crates-io v0.29.0
[INFO] [stderr]   Downloaded git2-curl v0.11.0
[INFO] [stderr]   Downloaded im-rc v13.0.0
[INFO] [stderr]   Downloaded cargo-platform v0.1.0
[INFO] [stderr]   Downloaded cargo v0.41.0
[INFO] [stderr]   Downloaded colored v1.9.1
[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" "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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1158a5340c1813b165415dbd12f2e0050ca8d3d605790b0d89f55c840abaf66c
[INFO] running `Command { std: "docker" "start" "-a" "1158a5340c1813b165415dbd12f2e0050ca8d3d605790b0d89f55c840abaf66c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1158a5340c1813b165415dbd12f2e0050ca8d3d605790b0d89f55c840abaf66c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1158a5340c1813b165415dbd12f2e0050ca8d3d605790b0d89f55c840abaf66c", kill_on_drop: false }`
[INFO] [stdout] 1158a5340c1813b165415dbd12f2e0050ca8d3d605790b0d89f55c840abaf66c
[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" "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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 49a8bb08c61c620f5c86dfcb3f664fe30daa90d2667883fff4b84de1ad943d61
[INFO] running `Command { std: "docker" "start" "-a" "49a8bb08c61c620f5c86dfcb3f664fe30daa90d2667883fff4b84de1ad943d61", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.13
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling curl v0.4.25
[INFO] [stderr]     Checking unicode-xid v0.2.0
[INFO] [stderr]     Checking bytesize v1.0.0
[INFO] [stderr]     Checking hex v0.4.0
[INFO] [stderr]     Checking rustc-workspace-hack v1.0.0
[INFO] [stderr]     Checking shell-escape v0.1.4
[INFO] [stderr]     Checking opener v0.4.1
[INFO] [stderr]     Checking home v0.5.1
[INFO] [stderr]     Checking pathdiff v0.1.0
[INFO] [stderr]     Checking fs_extra v1.1.0
[INFO] [stderr]     Checking vte v0.3.3
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]     Checking socket2 v0.3.11
[INFO] [stderr]     Checking filetime v0.2.8
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking fs2 v0.4.3
[INFO] [stderr]     Checking jobserver v0.1.17
[INFO] [stderr]     Checking bstr v0.2.8
[INFO] [stderr]     Checking sized-chunks v0.3.1
[INFO] [stderr]     Checking colored v1.9.1
[INFO] [stderr]     Checking proc-macro2 v1.0.7
[INFO] [stderr]     Checking strip-ansi-escapes v0.1.0
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling libnghttp2-sys v0.1.2
[INFO] [stderr]    Compiling libssh2-sys v0.2.13
[INFO] [stderr]    Compiling curl-sys v0.4.24
[INFO] [stderr]    Compiling libgit2-sys v0.9.2
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking tar v0.4.26
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]    Compiling c2-chacha v0.2.3
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]     Checking openssl-sys v0.9.53
[INFO] [stderr]     Checking backtrace-sys v0.1.32
[INFO] [stderr]     Checking dialoguer v0.5.0
[INFO] [stderr]     Checking globset v0.4.4
[INFO] [stderr]     Checking quote v1.0.2
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]     Checking pretty_env_logger v0.3.1
[INFO] [stderr]    Compiling rand v0.7.2
[INFO] [stderr]     Checking ignore v0.4.10
[INFO] [stderr]     Checking openssl v0.10.26
[INFO] [stderr]     Checking flate2 v1.0.13
[INFO] [stderr]     Checking crypto-hash v0.3.4
[INFO] [stderr]     Checking git2 v0.10.2
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling syn-mid v0.4.0
[INFO] [stderr]     Checking git2-curl v0.11.0
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling rustversion v1.0.1
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling proc-macro-error v0.4.4
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.3
[INFO] [stderr]    Compiling const-random-macro v0.1.6
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking which v3.1.0
[INFO] [stderr]     Checking const-random v0.1.6
[INFO] [stderr]     Checking ahash v0.2.18
[INFO] [stderr]     Checking hashbrown v0.6.3
[INFO] [stderr]    Compiling structopt-derive v0.4.0
[INFO] [stderr]     Checking serde v1.0.104
[INFO] [stderr]     Checking structopt v0.3.7
[INFO] [stderr]     Checking serde_json v1.0.44
[INFO] [stderr]     Checking toml v0.5.5
[INFO] [stderr]     Checking cargo-platform v0.1.0
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking serde_ignored v0.1.1
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking crates-io v0.29.0
[INFO] [stderr]     Checking rustfix v0.4.6
[INFO] [stderr]    Compiling im-rc v13.0.0
[INFO] [stderr]     Checking cargo v0.41.0
[INFO] [stderr]  Documenting wtf-rlsr v1.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(str_strip, try_trait)]
[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 `wtf-rlsr`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name wtf_rlsr src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern cargo=/opt/rustwide/target/debug/deps/libcargo-2d6e15308f1abe9e.rmeta --extern colored=/opt/rustwide/target/debug/deps/libcolored-2b6e6d848d5f1235.rmeta --extern console=/opt/rustwide/target/debug/deps/libconsole-989859855c628b47.rmeta --extern dialoguer=/opt/rustwide/target/debug/deps/libdialoguer-29542e5aac5f332b.rmeta --extern dirs=/opt/rustwide/target/debug/deps/libdirs-73be1262b20cee61.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-0971181724e71fb0.rmeta --extern fs_extra=/opt/rustwide/target/debug/deps/libfs_extra-b3164fe21b813f61.rmeta --extern git2=/opt/rustwide/target/debug/deps/libgit2-c8db83693bf50274.rmeta --extern glob=/opt/rustwide/target/debug/deps/libglob-029696837cd6fb58.rmeta --extern hashbrown=/opt/rustwide/target/debug/deps/libhashbrown-c4b311de28b4e69b.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-8cb8a4ba47ef9b79.rmeta --extern pathdiff=/opt/rustwide/target/debug/deps/libpathdiff-4e5a2e240b184a06.rmeta --extern pretty_env_logger=/opt/rustwide/target/debug/deps/libpretty_env_logger-cba32e7c91aae974.rmeta --extern semver=/opt/rustwide/target/debug/deps/libsemver-e152e84d8e2a3b05.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-5ddc05e91b585797.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-d4446292afd2f233.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-284eb0dbabe95ceb.rmeta --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-8d501f9d1004e3b2.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-4c77c6af7a12e31d.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-45b4ac23c059b3e6.rmeta --extern which=/opt/rustwide/target/debug/deps/libwhich-1ff3c7b7f9cd6c16.rmeta --cap-lints=warn --crate-version 1.1.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "49a8bb08c61c620f5c86dfcb3f664fe30daa90d2667883fff4b84de1ad943d61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49a8bb08c61c620f5c86dfcb3f664fe30daa90d2667883fff4b84de1ad943d61", kill_on_drop: false }`
[INFO] [stdout] 49a8bb08c61c620f5c86dfcb3f664fe30daa90d2667883fff4b84de1ad943d61
