[INFO] cloning repository https://github.com/nbrendler/keybase-chat-tui
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nbrendler/keybase-chat-tui" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnbrendler%2Fkeybase-chat-tui", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnbrendler%2Fkeybase-chat-tui'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 44743c82a517fe1612b5cd32cb2b9675a4c96557
[INFO] documenting nbrendler/keybase-chat-tui 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%2Fnbrendler%2Fkeybase-chat-tui" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nbrendler/keybase-chat-tui 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/nbrendler/keybase-chat-tui
[INFO] finished tweaking git repo https://github.com/nbrendler/keybase-chat-tui
[INFO] tweaked toml for git repo https://github.com/nbrendler/keybase-chat-tui written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/nbrendler/keybase-chat-tui 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 mio-named-pipes v0.1.7
[INFO] [stderr]   Downloaded chrono v0.4.9
[INFO] [stderr]   Downloaded const-random v0.1.13
[INFO] [stderr]   Downloaded darling v0.13.0
[INFO] [stderr]   Downloaded xi-unicode v0.2.0
[INFO] [stderr]   Downloaded tokio v0.2.22
[INFO] [stderr]   Downloaded miow v0.3.5
[INFO] [stderr]   Downloaded serde_derive v1.0.101
[INFO] [stderr]   Downloaded downcast v0.10.0
[INFO] [stderr]   Downloaded predicates-tree v1.0.0
[INFO] [stderr]   Downloaded predicates-core v1.0.0
[INFO] [stderr]   Downloaded mockall v0.8.1
[INFO] [stderr]   Downloaded cursive v0.15.2
[INFO] [stderr]   Downloaded mockall_derive v0.8.1
[INFO] [stderr]   Downloaded predicates v1.0.5
[INFO] [stderr]   Downloaded pkg-config v0.3.16
[INFO] [stderr]   Downloaded const-random-macro v0.1.13
[INFO] [stderr]   Downloaded enumset v1.0.7
[INFO] [stderr]   Downloaded cc v1.0.46
[INFO] [stderr]   Downloaded array-macro v1.0.4
[INFO] [stderr]   Downloaded darling_macro v0.13.0
[INFO] [stderr]   Downloaded darling_core v0.13.0
[INFO] [stderr]   Downloaded async-trait v0.1.41
[INFO] [stderr]   Downloaded enum-map v0.6.1
[INFO] [stderr]   Downloaded term_size v0.3.1
[INFO] [stderr]   Downloaded fragile v1.0.0
[INFO] [stderr]   Downloaded cursive_core v0.1.3
[INFO] [stderr]   Downloaded unicode-segmentation v1.5.0
[INFO] [stderr]   Downloaded serde_json v1.0.41
[INFO] [stderr]   Downloaded serde v1.0.101
[INFO] [stderr]   Downloaded pin-project-lite v0.1.9
[INFO] [stderr]   Downloaded arc-swap v0.4.3
[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: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] 43dafbbf4ef160e8c9d0007bf71fd2a0130766de69e7306400fb9ea2778937e6
[INFO] running `Command { std: "docker" "start" "-a" "43dafbbf4ef160e8c9d0007bf71fd2a0130766de69e7306400fb9ea2778937e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "43dafbbf4ef160e8c9d0007bf71fd2a0130766de69e7306400fb9ea2778937e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43dafbbf4ef160e8c9d0007bf71fd2a0130766de69e7306400fb9ea2778937e6", kill_on_drop: false }`
[INFO] [stdout] 43dafbbf4ef160e8c9d0007bf71fd2a0130766de69e7306400fb9ea2778937e6
[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: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] 15a7256c0e75ebb3425831b2781cd468de5266bba95ebe757f2f6b884c5f338b
[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" "15a7256c0e75ebb3425831b2781cd468de5266bba95ebe757f2f6b884c5f338b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]     Checking array-macro v1.0.4
[INFO] [stderr]     Checking pin-project-lite v0.1.9
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]    Compiling ncurses v5.99.0
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking signal-hook-registry v1.1.1
[INFO] [stderr]     Checking net2 v0.2.35
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking term_size v0.3.1
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]     Checking crossbeam-utils v0.7.2
[INFO] [stderr]     Checking signal-hook v0.1.10
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]    Compiling const-random-macro v0.1.13
[INFO] [stderr]     Checking crossbeam-channel v0.4.4
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking num-complex v0.3.1
[INFO] [stderr]     Checking const-random v0.1.13
[INFO] [stderr]     Checking ahash v0.4.7
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]     Checking chrono v0.4.9
[INFO] [stderr]     Checking num v0.3.1
[INFO] [stderr]    Compiling darling_core v0.13.0
[INFO] [stderr]    Compiling serde_derive v1.0.101
[INFO] [stderr]    Compiling enum-map-derive v0.4.3
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling async-trait v0.1.41
[INFO] [stderr]    Compiling darling_macro v0.13.0
[INFO] [stderr]     Checking enum-map v0.6.1
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]    Compiling darling v0.13.0
[INFO] [stderr]    Compiling enumset_derive v0.5.5
[INFO] [stderr]     Checking enumset v1.0.7
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]     Checking cursive_core v0.1.3
[INFO] [stderr]     Checking cursive v0.15.2
[INFO] [stderr]  Documenting keybase-chat-tui v1.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(exact_size_is_empty)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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] error: could not document `keybase-chat-tui`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name keybase_chat_tui_bin src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=97a3a4d990c24f60 -L dependency=/opt/rustwide/target/debug/deps --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-ae98dfdd89210736.so --extern cursive=/opt/rustwide/target/debug/deps/libcursive-5b8c0bfd1af80173.rmeta --extern dirs=/opt/rustwide/target/debug/deps/libdirs-b9c2a4e76b4e2f90.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-a329d7e098bc9b68.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-f115c091d543e6ab.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-f01329ea7599b34e.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-4f9a1a1ce8a63758.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-6e30543e512c6e27.rmeta --cap-lints=warn --crate-version 1.0.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "15a7256c0e75ebb3425831b2781cd468de5266bba95ebe757f2f6b884c5f338b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15a7256c0e75ebb3425831b2781cd468de5266bba95ebe757f2f6b884c5f338b", kill_on_drop: false }`
[INFO] [stdout] 15a7256c0e75ebb3425831b2781cd468de5266bba95ebe757f2f6b884c5f338b