[INFO] fetching crate ru_shell 0.1.1...
[INFO] checking ru_shell-0.1.1 against try#32cb8dc6fdc8140b91f4d17c4883e528db4e7e6d for pr-83312
[INFO] extracting crate ru_shell 0.1.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate ru_shell 0.1.1 on toolchain 32cb8dc6fdc8140b91f4d17c4883e528db4e7e6d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+32cb8dc6fdc8140b91f4d17c4883e528db4e7e6d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ru_shell 0.1.1
[INFO] finished tweaking crates.io crate ru_shell 0.1.1
[INFO] tweaked toml for crates.io crate ru_shell 0.1.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate ru_shell 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+32cb8dc6fdc8140b91f4d17c4883e528db4e7e6d" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thiserror-impl v1.0.22
[INFO] [stderr]   Downloaded redox_termios v0.1.1
[INFO] [stderr]   Downloaded anyhow v1.0.34
[INFO] [stderr]   Downloaded console v0.14.0
[INFO] [stderr]   Downloaded nix v0.18.0
[INFO] [stderr]   Downloaded thiserror v1.0.22
[INFO] [stderr]   Downloaded serde_derive v1.0.118
[INFO] [stderr]   Downloaded ctrlc v3.1.7
[INFO] [stderr]   Downloaded serde v1.0.118
[INFO] [stderr]   Downloaded syn v1.0.53
[INFO] [stderr]   Downloaded numtoa v0.1.0
[INFO] [stderr]   Downloaded termion v1.5.5
[INFO] [stderr]   Downloaded terminal_size v0.1.15
[INFO] [stderr]   Downloaded bogobble v0.1.0
[INFO] [stderr]   Downloaded err_tools v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+32cb8dc6fdc8140b91f4d17c4883e528db4e7e6d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] de1611a4e3d596f2cf0cbe91e406e439e7c4bd3e267133fc777671b044688a8d
[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" "de1611a4e3d596f2cf0cbe91e406e439e7c4bd3e267133fc777671b044688a8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de1611a4e3d596f2cf0cbe91e406e439e7c4bd3e267133fc777671b044688a8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de1611a4e3d596f2cf0cbe91e406e439e7c4bd3e267133fc777671b044688a8d", kill_on_drop: false }`
[INFO] [stdout] de1611a4e3d596f2cf0cbe91e406e439e7c4bd3e267133fc777671b044688a8d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "RUSTFLAGS=--cap-lints=forbid" "-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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+32cb8dc6fdc8140b91f4d17c4883e528db4e7e6d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fc36b34725b45eb25c52c31ac6410f8b4324b1dc9b7ea6e1d5a2462ee4759bf9
[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" "fc36b34725b45eb25c52c31ac6410f8b4324b1dc9b7ea6e1d5a2462ee4759bf9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling syn v1.0.53
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]    Compiling anyhow v1.0.34
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking bogobble v0.1.0
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking terminal_size v0.1.15
[INFO] [stderr]     Checking termion v1.5.5
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking console v0.14.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]     Checking thiserror v1.0.22
[INFO] [stderr]     Checking err_tools v0.1.0
[INFO] [stderr]     Checking ctrlc v3.1.7
[INFO] [stderr]     Checking ru_shell v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `del_n`
[INFO] [stdout]   --> src/ui.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub fn del_n(s: &str, n: usize) -> &str {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 35.41s
[INFO] running `Command { std: "docker" "inspect" "fc36b34725b45eb25c52c31ac6410f8b4324b1dc9b7ea6e1d5a2462ee4759bf9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc36b34725b45eb25c52c31ac6410f8b4324b1dc9b7ea6e1d5a2462ee4759bf9", kill_on_drop: false }`
[INFO] [stdout] fc36b34725b45eb25c52c31ac6410f8b4324b1dc9b7ea6e1d5a2462ee4759bf9