[INFO] cloning repository https://github.com/Kodiak-Web/kde_shift
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Kodiak-Web/kde_shift" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKodiak-Web%2Fkde_shift", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKodiak-Web%2Fkde_shift'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 95d81245679f2e96309d89b5a6fdc8a3c0b6c767
[INFO] checking Kodiak-Web/kde_shift against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKodiak-Web%2Fkde_shift" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Kodiak-Web/kde_shift on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Kodiak-Web/kde_shift
[INFO] finished tweaking git repo https://github.com/Kodiak-Web/kde_shift
[INFO] tweaked toml for git repo https://github.com/Kodiak-Web/kde_shift written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Kodiak-Web/kde_shift already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2398d8f2da2dfc8fc6a00aa8b96b3985f62ffec51060f2fb256560347337e077
[INFO] running `Command { std: "docker" "start" "-a" "2398d8f2da2dfc8fc6a00aa8b96b3985f62ffec51060f2fb256560347337e077", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2398d8f2da2dfc8fc6a00aa8b96b3985f62ffec51060f2fb256560347337e077", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2398d8f2da2dfc8fc6a00aa8b96b3985f62ffec51060f2fb256560347337e077", kill_on_drop: false }`
[INFO] [stdout] 2398d8f2da2dfc8fc6a00aa8b96b3985f62ffec51060f2fb256560347337e077
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] de87ed0f1938b7ad964514a50abb35eec6d777cd0d37651614c7748e1cdeb8cd
[INFO] running `Command { std: "docker" "start" "-a" "de87ed0f1938b7ad964514a50abb35eec6d777cd0d37651614c7748e1cdeb8cd", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking regex-syntax v0.6.28
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]     Checking regex v1.7.0
[INFO] [stderr]     Checking kde_shift v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | /     Command::new("dbus-send")
[INFO] [stdout] 11 | |         .args([
[INFO] [stdout] 12 | |             "--type=method_call",
[INFO] [stdout] 13 | |             "--dest=org.mpris.MediaPlayer2.playerctld",
[INFO] [stdout] ...  |
[INFO] [stdout] 16 | |         ])
[INFO] [stdout] 17 | |         .output();
[INFO] [stdout]    | |_________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let _ = Command::new("dbus-send")
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | /     Command::new("dbus-send")
[INFO] [stdout] 11 | |         .args([
[INFO] [stdout] 12 | |             "--type=method_call",
[INFO] [stdout] 13 | |             "--dest=org.mpris.MediaPlayer2.playerctld",
[INFO] [stdout] ...  |
[INFO] [stdout] 16 | |         ])
[INFO] [stdout] 17 | |         .output();
[INFO] [stdout]    | |_________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let _ = Command::new("dbus-send")
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.40s
[INFO] running `Command { std: "docker" "inspect" "de87ed0f1938b7ad964514a50abb35eec6d777cd0d37651614c7748e1cdeb8cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de87ed0f1938b7ad964514a50abb35eec6d777cd0d37651614c7748e1cdeb8cd", kill_on_drop: false }`
[INFO] [stdout] de87ed0f1938b7ad964514a50abb35eec6d777cd0d37651614c7748e1cdeb8cd