[INFO] cloning repository https://github.com/psatomas/iterators
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/psatomas/iterators" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpsatomas%2Fiterators", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpsatomas%2Fiterators'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c01afd1e8735c7e70be1b3e48bd24f0cc6fd9b9b
[INFO] checking psatomas/iterators against try#9961e55b3687a6d0b2bab4af0e5e81494b09be81 for pr-139087-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpsatomas%2Fiterators" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/psatomas/iterators
[INFO] finished tweaking git repo https://github.com/psatomas/iterators
[INFO] tweaked toml for git repo https://github.com/psatomas/iterators written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/psatomas/iterators on toolchain 9961e55b3687a6d0b2bab4af0e5e81494b09be81
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9961e55b3687a6d0b2bab4af0e5e81494b09be81" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/psatomas/iterators 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" "+9961e55b3687a6d0b2bab4af0e5e81494b09be81" "fetch" "--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] 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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+9961e55b3687a6d0b2bab4af0e5e81494b09be81" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 10b609be7a7320fd1b785a1732e9cccc3b1a36675f50c4cef1df9ab5ff93c26c
[INFO] running `Command { std: "docker" "start" "-a" "10b609be7a7320fd1b785a1732e9cccc3b1a36675f50c4cef1df9ab5ff93c26c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "10b609be7a7320fd1b785a1732e9cccc3b1a36675f50c4cef1df9ab5ff93c26c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10b609be7a7320fd1b785a1732e9cccc3b1a36675f50c4cef1df9ab5ff93c26c", kill_on_drop: false }`
[INFO] [stdout] 10b609be7a7320fd1b785a1732e9cccc3b1a36675f50c4cef1df9ab5ff93c26c
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+9961e55b3687a6d0b2bab4af0e5e81494b09be81" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9f38b2094c57b14cba9dc38eb7f6463f8e6da30008d2d0e790ab5e6390fab324
[INFO] running `Command { std: "docker" "start" "-a" "9f38b2094c57b14cba9dc38eb7f6463f8e6da30008d2d0e790ab5e6390fab324", kill_on_drop: false }`
[INFO] [stderr]     Checking colored v3.0.0
[INFO] [stderr]     Checking iterators v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> src/bin/the_any_and_all_methods.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | struct TVChannel {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 10 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TVChannel` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_iterator`
[INFO] [stdout]  --> src/bin/the_intoiterator_trait_in_action.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let my_iterator = my_vector.into_iter();
[INFO] [stdout]   |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_iterator`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_iterator`
[INFO] [stdout]  --> src/bin/the_intoiterator_trait_in_action.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let my_iterator = my_vector.into_iter();
[INFO] [stdout]   |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_iterator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_iterator`
[INFO] [stdout]   --> src/bin/the_intoiterator_trait_in_action.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let my_iterator = my_hashmap.into_iter();
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_iterator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `video_file`, `subtitles`, and `high_definition` are never read
[INFO] [stdout]  --> src/bin/collecting_command_line_arguments_ii.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Settings {
[INFO] [stdout]   |        -------- fields in this struct
[INFO] [stdout] 6 |     video_file: String,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 7 |     subtitles: bool,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 8 |     high_definition: bool,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Settings` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `playlist`
[INFO] [stdout]   --> src/bin/the_from_iterator_trait.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let playlist = songs.into_iter().collect::<Playlist>();
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_playlist`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `songs` and `users` are never read
[INFO] [stdout]  --> src/bin/the_from_iterator_trait.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Playlist {
[INFO] [stdout]   |        -------- fields in this struct
[INFO] [stdout] 5 |     songs: Vec<String>,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 6 |     users: HashSet<String>,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Playlist` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `playlist`
[INFO] [stdout]   --> src/bin/the_from_iterator_trait.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let playlist = songs.into_iter().collect::<Playlist>();
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_playlist`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `songs` and `users` are never read
[INFO] [stdout]  --> src/bin/the_from_iterator_trait.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Playlist {
[INFO] [stdout]   |        -------- fields in this struct
[INFO] [stdout] 5 |     songs: Vec<String>,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 6 |     users: HashSet<String>,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Playlist` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `manager` is never read
[INFO] [stdout]  --> src/bin/the_sort_and_sort_by_key_methods.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct GasStation {
[INFO] [stdout]   |        ---------- field in this struct
[INFO] [stdout] 3 |     snack_count: u32,
[INFO] [stdout] 4 |     manager: String,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `GasStation` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `manager` is never read
[INFO] [stdout]  --> src/bin/the_sort_and_sort_by_key_methods.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct GasStation {
[INFO] [stdout]   |        ---------- field in this struct
[INFO] [stdout] 3 |     snack_count: u32,
[INFO] [stdout] 4 |     manager: String,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `GasStation` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> src/bin/the_any_and_all_methods.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | struct TVChannel {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 10 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TVChannel` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_iterator`
[INFO] [stdout]  --> src/bin/the_intoiterator_trait_in_action.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let my_iterator = my_vector.into_iter();
[INFO] [stdout]   |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_iterator`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_iterator`
[INFO] [stdout]  --> src/bin/the_intoiterator_trait_in_action.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let my_iterator = my_vector.into_iter();
[INFO] [stdout]   |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_iterator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_iterator`
[INFO] [stdout]   --> src/bin/the_intoiterator_trait_in_action.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let my_iterator = my_hashmap.into_iter();
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_iterator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `video_file`, `subtitles`, and `high_definition` are never read
[INFO] [stdout]  --> src/bin/collecting_command_line_arguments_ii.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Settings {
[INFO] [stdout]   |        -------- fields in this struct
[INFO] [stdout] 6 |     video_file: String,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 7 |     subtitles: bool,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 8 |     high_definition: bool,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Settings` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.17s
[INFO] running `Command { std: "docker" "inspect" "9f38b2094c57b14cba9dc38eb7f6463f8e6da30008d2d0e790ab5e6390fab324", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f38b2094c57b14cba9dc38eb7f6463f8e6da30008d2d0e790ab5e6390fab324", kill_on_drop: false }`
[INFO] [stdout] 9f38b2094c57b14cba9dc38eb7f6463f8e6da30008d2d0e790ab5e6390fab324