[INFO] cloning repository https://github.com/arrudagates/tree-tunes
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/arrudagates/tree-tunes" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farrudagates%2Ftree-tunes", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farrudagates%2Ftree-tunes'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] aa08993e0434068f68ebd6f73c30eb5ef1741d39
[INFO] checking arrudagates/tree-tunes against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farrudagates%2Ftree-tunes" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/arrudagates/tree-tunes 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/arrudagates/tree-tunes
[INFO] finished tweaking git repo https://github.com/arrudagates/tree-tunes
[INFO] tweaked toml for git repo https://github.com/arrudagates/tree-tunes written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/arrudagates/tree-tunes 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded audiotags-dev-macro v0.1.4
[INFO] [stderr]   Downloaded mp4ameta_proc v0.1.1
[INFO] [stderr]   Downloaded metaflac v0.2.4
[INFO] [stderr]   Downloaded id3 v0.5.1
[INFO] [stderr]   Downloaded mp4ameta v0.6.1
[INFO] [stderr]   Downloaded libmpv-sys v3.1.0
[INFO] [stderr]   Downloaded libmpv v2.0.1
[INFO] [stderr]   Downloaded audiotags v0.2.7182
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] bfe520e109475711cb07dc93bd92f99c20f892449cce768319e617aa6a634096
[INFO] running `Command { std: "docker" "start" "-a" "bfe520e109475711cb07dc93bd92f99c20f892449cce768319e617aa6a634096", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bfe520e109475711cb07dc93bd92f99c20f892449cce768319e617aa6a634096", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfe520e109475711cb07dc93bd92f99c20f892449cce768319e617aa6a634096", kill_on_drop: false }`
[INFO] [stdout] bfe520e109475711cb07dc93bd92f99c20f892449cce768319e617aa6a634096
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 7ae169e9665b7ba60530028852fde9a848a883be67c87b75654558e1412477bc
[INFO] running `Command { std: "docker" "start" "-a" "7ae169e9665b7ba60530028852fde9a848a883be67c87b75654558e1412477bc", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]     Checking encoding_index_tests v0.1.4
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling syn v1.0.55
[INFO] [stderr]    Compiling const_fn v0.4.4
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking encoding-index-singlebyte v1.20141219.5
[INFO] [stderr]     Checking encoding-index-simpchinese v1.20141219.5
[INFO] [stderr]     Checking encoding-index-tradchinese v1.20141219.5
[INFO] [stderr]     Checking encoding-index-korean v1.20141219.5
[INFO] [stderr]     Checking encoding-index-japanese v1.20141219.5
[INFO] [stderr]     Checking smallvec v1.5.1
[INFO] [stderr]    Compiling libmpv-sys v3.1.0
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]     Checking encoding v0.2.33
[INFO] [stderr]    Compiling mp4ameta_proc v0.1.1
[INFO] [stderr]    Compiling libmpv v2.0.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking crossbeam-queue v0.3.1
[INFO] [stderr]     Checking crossbeam-epoch v0.9.1
[INFO] [stderr]     Checking metaflac v0.2.4
[INFO] [stderr]     Checking audiotags-dev-macro v0.1.4
[INFO] [stderr]     Checking mio v0.7.6
[INFO] [stderr]     Checking signal-hook-registry v1.2.2
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking parking_lot_core v0.8.2
[INFO] [stderr]     Checking flate2 v1.0.19
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking mp4ameta v0.6.1
[INFO] [stderr]     Checking signal-hook v0.1.16
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking crossbeam v0.8.0
[INFO] [stderr]     Checking id3 v0.5.1
[INFO] [stderr]     Checking crossterm v0.18.2
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking libmath v0.2.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]     Checking thiserror v1.0.22
[INFO] [stderr]     Checking audiotags v0.2.7182
[INFO] [stderr]     Checking rustree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Ord` is imported redundantly
[INFO] [stdout]  --> src/bstree.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cmp::{Ord, Ordering};
[INFO] [stdout]   |                ^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ord` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Ord` is imported redundantly
[INFO] [stdout]  --> src/bstree.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cmp::{Ord, Ordering};
[INFO] [stdout]   |                ^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ord` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[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 15.80s
[INFO] running `Command { std: "docker" "inspect" "7ae169e9665b7ba60530028852fde9a848a883be67c87b75654558e1412477bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ae169e9665b7ba60530028852fde9a848a883be67c87b75654558e1412477bc", kill_on_drop: false }`
[INFO] [stdout] 7ae169e9665b7ba60530028852fde9a848a883be67c87b75654558e1412477bc
[INFO] checking arrudagates/tree-tunes against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farrudagates%2Ftree-tunes" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/arrudagates/tree-tunes 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/arrudagates/tree-tunes
[INFO] finished tweaking git repo https://github.com/arrudagates/tree-tunes
[INFO] tweaked toml for git repo https://github.com/arrudagates/tree-tunes written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/arrudagates/tree-tunes 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 6892a5c774c67c39c1173837f2e7c549a0668062f0c570f1ade5a1fb739d63d0
[INFO] running `Command { std: "docker" "start" "-a" "6892a5c774c67c39c1173837f2e7c549a0668062f0c570f1ade5a1fb739d63d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6892a5c774c67c39c1173837f2e7c549a0668062f0c570f1ade5a1fb739d63d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6892a5c774c67c39c1173837f2e7c549a0668062f0c570f1ade5a1fb739d63d0", kill_on_drop: false }`
[INFO] [stdout] 6892a5c774c67c39c1173837f2e7c549a0668062f0c570f1ade5a1fb739d63d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 6dc9b3162fa298ddafa7954ba89335b428872b8b180a4025dda5f18ddf4bb59e
[INFO] running `Command { std: "docker" "start" "-a" "6dc9b3162fa298ddafa7954ba89335b428872b8b180a4025dda5f18ddf4bb59e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]     Checking encoding_index_tests v0.1.4
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling syn v1.0.55
[INFO] [stderr]    Compiling const_fn v0.4.4
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking smallvec v1.5.1
[INFO] [stderr]     Checking encoding-index-korean v1.20141219.5
[INFO] [stderr]     Checking encoding-index-japanese v1.20141219.5
[INFO] [stderr]     Checking encoding-index-tradchinese v1.20141219.5
[INFO] [stderr]     Checking encoding-index-singlebyte v1.20141219.5
[INFO] [stderr]     Checking encoding-index-simpchinese v1.20141219.5
[INFO] [stderr]    Compiling libmpv-sys v3.1.0
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]     Checking encoding v0.2.33
[INFO] [stderr]    Compiling mp4ameta_proc v0.1.1
[INFO] [stderr]    Compiling libmpv v2.0.1
[INFO] [stderr]     Checking crossbeam-queue v0.3.1
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking crossbeam-epoch v0.9.1
[INFO] [stderr]     Checking signal-hook-registry v1.2.2
[INFO] [stderr]     Checking parking_lot_core v0.8.2
[INFO] [stderr]     Checking flate2 v1.0.19
[INFO] [stderr]     Checking mio v0.7.6
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking mp4ameta v0.6.1
[INFO] [stderr]     Checking metaflac v0.2.4
[INFO] [stderr]     Checking signal-hook v0.1.16
[INFO] [stderr]     Checking audiotags-dev-macro v0.1.4
[INFO] [stderr]     Checking id3 v0.5.1
[INFO] [stderr]     Checking crossterm v0.18.2
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking libmath v0.2.1
[INFO] [stderr]     Checking crossbeam v0.8.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]     Checking thiserror v1.0.22
[INFO] [stderr]     Checking audiotags v0.2.7182
[INFO] [stderr]     Checking rustree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Ord` is imported redundantly
[INFO] [stdout]  --> src/bstree.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cmp::{Ord, Ordering};
[INFO] [stdout]   |                ^^^
[INFO] [stdout]  --> /rustc/2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ord` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Ord` is imported redundantly
[INFO] [stdout]  --> src/bstree.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cmp::{Ord, Ordering};
[INFO] [stdout]   |                ^^^
[INFO] [stdout]  --> /rustc/2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ord` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[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 15.08s
[INFO] running `Command { std: "docker" "inspect" "6dc9b3162fa298ddafa7954ba89335b428872b8b180a4025dda5f18ddf4bb59e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6dc9b3162fa298ddafa7954ba89335b428872b8b180a4025dda5f18ddf4bb59e", kill_on_drop: false }`
[INFO] [stdout] 6dc9b3162fa298ddafa7954ba89335b428872b8b180a4025dda5f18ddf4bb59e