[INFO] cloning repository https://github.com/darkwater/obsidian
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/darkwater/obsidian" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdarkwater%2Fobsidian", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdarkwater%2Fobsidian'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 877e0b864eebb28b4b9078b2dddee7cde18b5fed
[INFO] documenting darkwater/obsidian against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdarkwater%2Fobsidian" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/darkwater/obsidian on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/darkwater/obsidian
[INFO] finished tweaking git repo https://github.com/darkwater/obsidian
[INFO] tweaked toml for git repo https://github.com/darkwater/obsidian written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/darkwater/obsidian already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 374a36ccc9be4f289504450b5a5e645455355389982a127e867bbfba485e1bfa
[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" "374a36ccc9be4f289504450b5a5e645455355389982a127e867bbfba485e1bfa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "374a36ccc9be4f289504450b5a5e645455355389982a127e867bbfba485e1bfa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "374a36ccc9be4f289504450b5a5e645455355389982a127e867bbfba485e1bfa", kill_on_drop: false }`
[INFO] [stdout] 374a36ccc9be4f289504450b5a5e645455355389982a127e867bbfba485e1bfa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 046cf989152899920815572349ad7ac4eb90001dd8ee82730aae0d7a9129db67
[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" "046cf989152899920815572349ad7ac4eb90001dd8ee82730aae0d7a9129db67", kill_on_drop: false }`
[INFO] [stderr]    Compiling pkg-config v0.3.13
[INFO] [stderr]    Compiling gio v0.5.0
[INFO] [stderr]    Compiling gdk-pixbuf v0.5.0
[INFO] [stderr]    Compiling gdk v0.9.0
[INFO] [stderr]    Compiling gtk v0.5.0
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]    Compiling quote v0.6.5
[INFO] [stderr]     Checking mpd v0.0.12 (https://github.com/kstep/rust-mpd#0b6b98e9)
[INFO] [stderr]     Checking serde_json v1.0.24
[INFO] [stderr]     Checking toml v0.4.6
[INFO] [stderr]    Compiling syn v0.14.7
[INFO] [stderr]    Compiling syn v0.15.4
[INFO] [stderr]     Checking nom v4.0.0
[INFO] [stderr]     Checking i3ipc v0.8.2
[INFO] [stderr]    Compiling glib-sys v0.7.0
[INFO] [stderr]    Compiling gobject-sys v0.7.0
[INFO] [stderr]    Compiling gio-sys v0.7.0
[INFO] [stderr]    Compiling cairo-sys-rs v0.7.0
[INFO] [stderr]    Compiling pango-sys v0.7.0
[INFO] [stderr]    Compiling gdk-pixbuf-sys v0.7.0
[INFO] [stderr]    Compiling gdk-sys v0.7.0
[INFO] [stderr]    Compiling atk-sys v0.7.0
[INFO] [stderr]    Compiling gtk-sys v0.7.0
[INFO] [stderr]    Compiling pangocairo-sys v0.8.0
[INFO] [stderr]    Compiling cairo-rs v0.5.0
[INFO] [stderr]    Compiling pangocairo v0.6.0
[INFO] [stderr]     Checking config v0.9.0
[INFO] [stderr]     Checking glib v0.6.0
[INFO] [stderr]    Compiling serde_derive v1.0.78
[INFO] [stderr]     Checking pango v0.5.0
[INFO] [stderr]    Compiling relm-gen-widget v0.15.0
[INFO] [stderr]    Compiling relm-derive-common v0.15.0
[INFO] [stderr]    Compiling relm-derive v0.15.0
[INFO] [stderr]     Checking relm-core v0.15.0
[INFO] [stderr]     Checking relm-state v0.15.0
[INFO] [stderr]     Checking relm v0.15.0
[INFO] [stderr]  Documenting obsidian v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(nll, range_contains)]
[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 `obsidian`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name obsidian src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern cairo=/opt/rustwide/target/debug/deps/libcairo-02a18ebfce10afc6.rmeta --extern config=/opt/rustwide/target/debug/deps/libconfig-b8e7891fc5ba2dbb.rmeta --extern gdk=/opt/rustwide/target/debug/deps/libgdk-4668e024cfe3f182.rmeta --extern gdk_sys=/opt/rustwide/target/debug/deps/libgdk_sys-67d015366bc12bb9.rmeta --extern glib=/opt/rustwide/target/debug/deps/libglib-9b6bd3a716d3dd5e.rmeta --extern gtk=/opt/rustwide/target/debug/deps/libgtk-77ad4a4e0baac5b4.rmeta --extern i3ipc=/opt/rustwide/target/debug/deps/libi3ipc-674aba5ed33ee621.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-a4e01d700bacbbb2.rmeta --extern mpd=/opt/rustwide/target/debug/deps/libmpd-a0981af97e6e4b16.rmeta --extern pango=/opt/rustwide/target/debug/deps/libpango-36f1f709d0134ef0.rmeta --extern pangocairo=/opt/rustwide/target/debug/deps/libpangocairo-c590d2edb87f485d.rmeta --extern relm=/opt/rustwide/target/debug/deps/librelm-9f20030ce3c34334.rmeta --extern relm_core=/opt/rustwide/target/debug/deps/librelm_core-6457ef50f4287e03.rmeta --extern relm_derive=/opt/rustwide/target/debug/deps/librelm_derive-a989e14246a6c02f.so --extern serde=/opt/rustwide/target/debug/deps/libserde-c5f464f2a114f8da.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-638c2a70221761ca.so --extern time=/opt/rustwide/target/debug/deps/libtime-285bd131f0171575.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "046cf989152899920815572349ad7ac4eb90001dd8ee82730aae0d7a9129db67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "046cf989152899920815572349ad7ac4eb90001dd8ee82730aae0d7a9129db67", kill_on_drop: false }`
[INFO] [stdout] 046cf989152899920815572349ad7ac4eb90001dd8ee82730aae0d7a9129db67