[INFO] cloning repository https://github.com/lfairy/karkinos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lfairy/karkinos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flfairy%2Fkarkinos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flfairy%2Fkarkinos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b1339476c746941d5142182c6a2800f8c6557617
[INFO] documenting lfairy/karkinos 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%2Flfairy%2Fkarkinos" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lfairy/karkinos 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/lfairy/karkinos
[INFO] finished tweaking git repo https://github.com/lfairy/karkinos
[INFO] tweaked toml for git repo https://github.com/lfairy/karkinos written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/lfairy/karkinos 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]  Downloading crates ...
[INFO] [stderr]   Downloaded mount v0.4.0
[INFO] [stderr]   Downloaded nibble_vec v0.0.4
[INFO] [stderr]   Downloaded miow v0.1.5
[INFO] [stderr]   Downloaded notify v4.0.3
[INFO] [stderr]   Downloaded caseless v0.2.1
[INFO] [stderr]   Downloaded inotify v0.3.0
[INFO] [stderr]   Downloaded regex v1.0.0
[INFO] [stderr]   Downloaded filetime v0.1.15
[INFO] [stderr]   Downloaded mime v0.3.7
[INFO] [stderr]   Downloaded markup5ever v0.7.2
[INFO] [stderr]   Downloaded sequence_trie v0.3.5
[INFO] [stderr]   Downloaded utf-8 v0.7.2
[INFO] [stderr]   Downloaded rand_core v0.2.0
[INFO] [stderr]   Downloaded regex-syntax v0.6.0
[INFO] [stderr]   Downloaded ammonia v1.1.0
[INFO] [stderr]   Downloaded radix_trie v0.1.3
[INFO] [stderr]   Downloaded rand v0.5.0
[INFO] [stderr]   Downloaded html5ever v0.22.3
[INFO] [stderr]   Downloaded tendril v0.4.0
[INFO] [stderr]   Downloaded fsevent-sys v0.1.6
[INFO] [stderr]   Downloaded route-recognizer v0.1.12
[INFO] [stderr]   Downloaded mime_guess v1.8.4
[INFO] [stderr]   Downloaded fsevent v0.2.17
[INFO] [stderr]   Downloaded router v0.6.0
[INFO] [stderr]   Downloaded staticfile v0.5.0
[INFO] [stderr]   Downloaded persistent v0.4.0
[INFO] [stderr]   Downloaded bodyparser v0.8.0
[INFO] [stderr]   Downloaded urlencoded v0.6.0
[INFO] [stderr]   Downloaded literalext v0.1.1
[INFO] [stderr]   Downloaded logger v0.4.0
[INFO] [stderr]   Downloaded bk-tree v0.3.0
[INFO] [stderr]   Downloaded maud_htmlescape v0.17.0
[INFO] [stderr]   Downloaded maud_macros v0.17.5
[INFO] [stderr]   Downloaded maud v0.17.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b742de2361f44e0899c0c1acbcfc603443f27aeec1cc36621d88e4c45fa8466c
[INFO] running `Command { std: "docker" "start" "-a" "b742de2361f44e0899c0c1acbcfc603443f27aeec1cc36621d88e4c45fa8466c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b742de2361f44e0899c0c1acbcfc603443f27aeec1cc36621d88e4c45fa8466c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b742de2361f44e0899c0c1acbcfc603443f27aeec1cc36621d88e4c45fa8466c", kill_on_drop: false }`
[INFO] [stdout] b742de2361f44e0899c0c1acbcfc603443f27aeec1cc36621d88e4c45fa8466c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] 63303635ac88b41415840a33952aba8487a31f2411992d17a7251846cde0c36f
[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" "63303635ac88b41415840a33952aba8487a31f2411992d17a7251846cde0c36f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.42
[INFO] [stderr]    Compiling itoa v0.4.1
[INFO] [stderr]    Compiling lazy_static v1.0.1
[INFO] [stderr]     Checking utf-8 v0.7.2
[INFO] [stderr]    Compiling matches v0.1.6
[INFO] [stderr]     Checking same-file v1.0.2
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]     Checking sequence_trie v0.3.5
[INFO] [stderr]    Compiling literalext v0.1.1
[INFO] [stderr]     Checking slab v0.1.3
[INFO] [stderr]    Compiling maud_htmlescape v0.17.0
[INFO] [stderr]     Checking bytes v0.3.0
[INFO] [stderr]     Checking getopts v0.2.17
[INFO] [stderr]     Checking rand_core v0.2.0
[INFO] [stderr]     Checking nibble_vec v0.0.4
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/literalext-0.1.1/src/lib.rs:19:37
[INFO] [stdout]    |
[INFO] [stdout] 19 | #![cfg_attr(feature = "proc-macro", feature(proc_macro))]
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking bk-tree v0.3.0
[INFO] [stderr]    Compiling proc-macro2 v0.3.8
[INFO] [stderr]     Checking base64 v0.6.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.6
[INFO] [stderr]     Checking net2 v0.2.32
[INFO] [stderr]     Checking filetime v0.1.15
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr]     Checking inotify v0.3.0
[INFO] [stderr] error: could not compile `literalext` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "63303635ac88b41415840a33952aba8487a31f2411992d17a7251846cde0c36f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63303635ac88b41415840a33952aba8487a31f2411992d17a7251846cde0c36f", kill_on_drop: false }`
[INFO] [stdout] 63303635ac88b41415840a33952aba8487a31f2411992d17a7251846cde0c36f