[INFO] cloning repository https://github.com/ibabushkin/gabelstaplerwm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ibabushkin/gabelstaplerwm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fibabushkin%2Fgabelstaplerwm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fibabushkin%2Fgabelstaplerwm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b7950e2443f871cf270c35b8671ce3627790c26c
[INFO] documenting ibabushkin/gabelstaplerwm against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fibabushkin%2Fgabelstaplerwm" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ibabushkin/gabelstaplerwm on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ibabushkin/gabelstaplerwm
[INFO] finished tweaking git repo https://github.com/ibabushkin/gabelstaplerwm
[INFO] tweaked toml for git repo https://github.com/ibabushkin/gabelstaplerwm written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/ibabushkin/gabelstaplerwm already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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 serde v1.0.90
[INFO] [stderr]   Downloaded getopts v0.2.18
[INFO] [stderr]   Downloaded generational-arena v0.2.2
[INFO] [stderr]   Downloaded xkb v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e38d260648287c79ec5aeabd06c8e718397b04e52eb421bfe2f770f4529b0302
[INFO] running `Command { std: "docker" "start" "-a" "e38d260648287c79ec5aeabd06c8e718397b04e52eb421bfe2f770f4529b0302", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e38d260648287c79ec5aeabd06c8e718397b04e52eb421bfe2f770f4529b0302", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e38d260648287c79ec5aeabd06c8e718397b04e52eb421bfe2f770f4529b0302", kill_on_drop: false }`
[INFO] [stdout] e38d260648287c79ec5aeabd06c8e718397b04e52eb421bfe2f770f4529b0302
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ab7be2b19b5df3b02ab549bca111f5332d548aa6c026cfef9ce309ad0a287988
[INFO] running `Command { std: "docker" "start" "-a" "ab7be2b19b5df3b02ab549bca111f5332d548aa6c026cfef9ce309ad0a287988", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]     Checking cfg-if v0.1.7
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling pkg-config v0.3.14
[INFO] [stderr]    Compiling serde v1.0.90
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]    Compiling regex v1.1.6
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]     Checking quick-error v1.2.2
[INFO] [stderr]     Checking utf8-ranges v1.0.2
[INFO] [stderr]     Checking bitflags v0.9.1
[INFO] [stderr]     Checking termcolor v1.0.4
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking generational-arena v0.2.2
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking getopts v0.2.18
[INFO] [stderr]     Checking humantime v1.2.0
[INFO] [stderr]     Checking regex-syntax v0.6.6
[INFO] [stderr]  Documenting gwm-core v0.8.0 (/opt/rustwide/workdir/gwm-core)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> gwm-core/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(type_alias_enum_variants)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `type_alias_enum_variants` has been stable since 1.37.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling xkbcommon-sys v0.7.4
[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 `gwm-core`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name gwm_core gwm-core/src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=b0d884fa852b892a -L dependency=/opt/rustwide/target/debug/deps --extern generational_arena=/opt/rustwide/target/debug/deps/libgenerational_arena-5022c947a1b3f839.rmeta --cap-lints=warn --crate-version 0.8.0` (exit status: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "ab7be2b19b5df3b02ab549bca111f5332d548aa6c026cfef9ce309ad0a287988", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab7be2b19b5df3b02ab549bca111f5332d548aa6c026cfef9ce309ad0a287988", kill_on_drop: false }`
[INFO] [stdout] ab7be2b19b5df3b02ab549bca111f5332d548aa6c026cfef9ce309ad0a287988