[INFO] cloning repository https://github.com/mouchabeurre/i3-window-killer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mouchabeurre/i3-window-killer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmouchabeurre%2Fi3-window-killer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmouchabeurre%2Fi3-window-killer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0c39c03191afd5b8d199e427a2ed221c80129530
[INFO] checking mouchabeurre/i3-window-killer against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmouchabeurre%2Fi3-window-killer" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mouchabeurre/i3-window-killer on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mouchabeurre/i3-window-killer
[INFO] finished tweaking git repo https://github.com/mouchabeurre/i3-window-killer
[INFO] tweaked toml for git repo https://github.com/mouchabeurre/i3-window-killer written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mouchabeurre/i3-window-killer 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/mouchabeurre/tokio-i3ipc`
[INFO] [stderr]      Locking 1 package
[INFO] [stderr]     Updating i3-window-killer v0.3.2 (/workspace/builds/worker-7-tc1/source) -> v0.3.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d8cce37d065ba0747e7fbcaa3f6d7025226da0a4aab270081da6b852215e0ca5
[INFO] running `Command { std: "docker" "start" "-a" "d8cce37d065ba0747e7fbcaa3f6d7025226da0a4aab270081da6b852215e0ca5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8cce37d065ba0747e7fbcaa3f6d7025226da0a4aab270081da6b852215e0ca5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8cce37d065ba0747e7fbcaa3f6d7025226da0a4aab270081da6b852215e0ca5", kill_on_drop: false }`
[INFO] [stdout] d8cce37d065ba0747e7fbcaa3f6d7025226da0a4aab270081da6b852215e0ca5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] efe4e205601d12d381d40fcf5eef95cfdaff3d5170a1d66d56148569d60c8b89
[INFO] running `Command { std: "docker" "start" "-a" "efe4e205601d12d381d40fcf5eef95cfdaff3d5170a1d66d56148569d60c8b89", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking fuzzy-matcher v0.3.7
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking globset v0.4.8
[INFO] [stderr]     Checking ignore v0.4.18
[INFO] [stderr]    Compiling serde_repr v0.1.7
[INFO] [stderr]     Checking i3ipc-types v0.13.0 (https://github.com/mouchabeurre/tokio-i3ipc?rev=4077a49#4077a491)
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking i3_ipc v0.13.0 (https://github.com/mouchabeurre/tokio-i3ipc?rev=4077a49#4077a491)
[INFO] [stderr]     Checking i3-window-killer v0.3.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/lib.rs:22:56
[INFO] [stdout]    |
[INFO] [stdout] 22 |             args.append(vec!["-config", config.as_str().clone()].as_mut());
[INFO] [stdout]    |                                                        ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/lib.rs:25:59
[INFO] [stdout]    |
[INFO] [stdout] 25 |             args.append(vec!["-theme-str", styles.as_str().clone()].as_mut());
[INFO] [stdout]    |                                                           ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/lib.rs:22:56
[INFO] [stdout]    |
[INFO] [stdout] 22 |             args.append(vec!["-config", config.as_str().clone()].as_mut());
[INFO] [stdout]    |                                                        ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/lib.rs:25:59
[INFO] [stdout]    |
[INFO] [stdout] 25 |             args.append(vec!["-theme-str", styles.as_str().clone()].as_mut());
[INFO] [stdout]    |                                                           ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.87s
[INFO] running `Command { std: "docker" "inspect" "efe4e205601d12d381d40fcf5eef95cfdaff3d5170a1d66d56148569d60c8b89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efe4e205601d12d381d40fcf5eef95cfdaff3d5170a1d66d56148569d60c8b89", kill_on_drop: false }`
[INFO] [stdout] efe4e205601d12d381d40fcf5eef95cfdaff3d5170a1d66d56148569d60c8b89
[INFO] checking mouchabeurre/i3-window-killer against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmouchabeurre%2Fi3-window-killer" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mouchabeurre/i3-window-killer on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mouchabeurre/i3-window-killer
[INFO] finished tweaking git repo https://github.com/mouchabeurre/i3-window-killer
[INFO] tweaked toml for git repo https://github.com/mouchabeurre/i3-window-killer written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mouchabeurre/i3-window-killer 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]      Locking 1 package
[INFO] [stderr]     Updating i3-window-killer v0.3.2 (/workspace/builds/worker-7-tc2/source) -> v0.3.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2f90abffe43126880c7a6ddcc1f6d9b5d018031d561d60d08d9e37b5589e5bdc
[INFO] running `Command { std: "docker" "start" "-a" "2f90abffe43126880c7a6ddcc1f6d9b5d018031d561d60d08d9e37b5589e5bdc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f90abffe43126880c7a6ddcc1f6d9b5d018031d561d60d08d9e37b5589e5bdc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f90abffe43126880c7a6ddcc1f6d9b5d018031d561d60d08d9e37b5589e5bdc", kill_on_drop: false }`
[INFO] [stdout] 2f90abffe43126880c7a6ddcc1f6d9b5d018031d561d60d08d9e37b5589e5bdc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6ccb6d4f452da23d656d4b02a4ef4883f240c33f8824b48edd989d1c6476f01d
[INFO] running `Command { std: "docker" "start" "-a" "6ccb6d4f452da23d656d4b02a4ef4883f240c33f8824b48edd989d1c6476f01d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking fuzzy-matcher v0.3.7
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking globset v0.4.8
[INFO] [stderr]     Checking ignore v0.4.18
[INFO] [stderr]    Compiling serde_repr v0.1.7
[INFO] [stderr]     Checking i3ipc-types v0.13.0 (https://github.com/mouchabeurre/tokio-i3ipc?rev=4077a49#4077a491)
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking i3_ipc v0.13.0 (https://github.com/mouchabeurre/tokio-i3ipc?rev=4077a49#4077a491)
[INFO] [stderr]     Checking i3-window-killer v0.3.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/lib.rs:22:56
[INFO] [stdout]    |
[INFO] [stdout] 22 |             args.append(vec!["-config", config.as_str().clone()].as_mut());
[INFO] [stdout]    |                                                        ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/lib.rs:25:59
[INFO] [stdout]    |
[INFO] [stdout] 25 |             args.append(vec!["-theme-str", styles.as_str().clone()].as_mut());
[INFO] [stdout]    |                                                           ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/lib.rs:22:56
[INFO] [stdout]    |
[INFO] [stdout] 22 |             args.append(vec!["-config", config.as_str().clone()].as_mut());
[INFO] [stdout]    |                                                        ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/lib.rs:25:59
[INFO] [stdout]    |
[INFO] [stdout] 25 |             args.append(vec!["-theme-str", styles.as_str().clone()].as_mut());
[INFO] [stdout]    |                                                           ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.85s
[INFO] running `Command { std: "docker" "inspect" "6ccb6d4f452da23d656d4b02a4ef4883f240c33f8824b48edd989d1c6476f01d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ccb6d4f452da23d656d4b02a4ef4883f240c33f8824b48edd989d1c6476f01d", kill_on_drop: false }`
[INFO] [stdout] 6ccb6d4f452da23d656d4b02a4ef4883f240c33f8824b48edd989d1c6476f01d