[INFO] cloning repository https://github.com/slightknack/together
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/slightknack/together" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fslightknack%2Ftogether", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fslightknack%2Ftogether'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4ed7cac40f1804fc30cc2420072c3ff39bb1f191
[INFO] checking slightknack/together against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fslightknack%2Ftogether" "/workspace/builds/worker-116/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-116/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/slightknack/together on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/slightknack/together
[INFO] finished tweaking git repo https://github.com/slightknack/together
[INFO] tweaked toml for git repo https://github.com/slightknack/together written to /workspace/builds/worker-116/source/Cargo.toml
[INFO] crate git repo https://github.com/slightknack/together already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 444d0ed4fe297dbae73202f980967475531ccdd07e837f961e90339dc4f03745
[INFO] running `Command { std: "docker" "start" "-a" "444d0ed4fe297dbae73202f980967475531ccdd07e837f961e90339dc4f03745", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "444d0ed4fe297dbae73202f980967475531ccdd07e837f961e90339dc4f03745", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "444d0ed4fe297dbae73202f980967475531ccdd07e837f961e90339dc4f03745", kill_on_drop: false }`
[INFO] [stdout] 444d0ed4fe297dbae73202f980967475531ccdd07e837f961e90339dc4f03745
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1dcff3bb8cc1d254a4adb4f585e4a182bd699893d11c255426aaad54866c383a
[INFO] running `Command { std: "docker" "start" "-a" "1dcff3bb8cc1d254a4adb4f585e4a182bd699893d11c255426aaad54866c383a", kill_on_drop: false }`
[INFO] [stderr]     Checking together v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `User`
[INFO] [stdout]  --> src/tree_log.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct User(usize);
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `User`
[INFO] [stdout]  --> src/tree_log.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct User(usize);
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Id`
[INFO] [stdout]   --> src/tree_log.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Id(User, usize, usize);
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.19s
[INFO] [stdout] warning: struct is never constructed: `Edit`
[INFO] [stdout]   --> src/tree_log.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Edit {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `History`
[INFO] [stdout]   --> src/tree_log.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct History<T: Collection> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `TreeLog`
[INFO] [stdout]   --> src/tree_log.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct TreeLog<T: Collection> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Leaf`
[INFO] [stdout]  --> src/index_tree.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Leaf(T),
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]   --> src/index_tree.rs:85:12
[INFO] [stdout]    |
[INFO] [stdout] 85 |     pub fn get(&self, index: usize) -> &T {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert`
[INFO] [stdout]   --> src/index_tree.rs:95:12
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn insert(&mut self, item: T, index: usize) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Id`
[INFO] [stdout]   --> src/tree_log.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Id(User, usize, usize);
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Edit`
[INFO] [stdout]   --> src/tree_log.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Edit {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `History`
[INFO] [stdout]   --> src/tree_log.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct History<T: Collection> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `TreeLog`
[INFO] [stdout]   --> src/tree_log.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct TreeLog<T: Collection> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Leaf`
[INFO] [stdout]  --> src/index_tree.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Leaf(T),
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]   --> src/index_tree.rs:85:12
[INFO] [stdout]    |
[INFO] [stdout] 85 |     pub fn get(&self, index: usize) -> &T {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert`
[INFO] [stdout]   --> src/index_tree.rs:95:12
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn insert(&mut self, item: T, index: usize) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "1dcff3bb8cc1d254a4adb4f585e4a182bd699893d11c255426aaad54866c383a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1dcff3bb8cc1d254a4adb4f585e4a182bd699893d11c255426aaad54866c383a", kill_on_drop: false }`
[INFO] [stdout] 1dcff3bb8cc1d254a4adb4f585e4a182bd699893d11c255426aaad54866c383a