[INFO] cloning repository https://github.com/anookinov-training-ground/rust_traits
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/anookinov-training-ground/rust_traits" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanookinov-training-ground%2Frust_traits", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanookinov-training-ground%2Frust_traits'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dfcf865128331afd119973915b25fa8c1417f572
[INFO] checking anookinov-training-ground/rust_traits against try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanookinov-training-ground%2Frust_traits" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/anookinov-training-ground/rust_traits
[INFO] finished tweaking git repo https://github.com/anookinov-training-ground/rust_traits
[INFO] tweaked toml for git repo https://github.com/anookinov-training-ground/rust_traits written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/anookinov-training-ground/rust_traits on toolchain 93086cfebfccb79083c59d0d3b2052944bba643c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/anookinov-training-ground/rust_traits 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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6b0e8228abe26e010bbfef53568923b409875fa00090d00e0929809906413be0
[INFO] running `Command { std: "docker" "start" "-a" "6b0e8228abe26e010bbfef53568923b409875fa00090d00e0929809906413be0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b0e8228abe26e010bbfef53568923b409875fa00090d00e0929809906413be0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b0e8228abe26e010bbfef53568923b409875fa00090d00e0929809906413be0", kill_on_drop: false }`
[INFO] [stdout] 6b0e8228abe26e010bbfef53568923b409875fa00090d00e0929809906413be0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 90b2d581690b177e3e87e00d7fb87b444021ec5bc8579afc4e08160291c4ff06
[INFO] running `Command { std: "docker" "start" "-a" "90b2d581690b177e3e87e00d7fb87b444021ec5bc8579afc4e08160291c4ff06", kill_on_drop: false }`
[INFO] [stderr]     Checking traits v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `Pair` is never constructed
[INFO] [stdout]    --> src/lib.rs:121:12
[INFO] [stdout]     |
[INFO] [stdout] 121 | pub struct Pair<T> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]     = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]    --> src/lib.rs:122:5
[INFO] [stdout]     |
[INFO] [stdout] 121 | pub struct Pair<T> {
[INFO] [stdout]     |            ---- fields in this struct
[INFO] [stdout] 122 |     x: T,
[INFO] [stdout]     |     ^
[INFO] [stdout] 123 |     y: T,
[INFO] [stdout]     |     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/lib.rs:127:8
[INFO] [stdout]     |
[INFO] [stdout] 126 | impl<T> Pair<T> {
[INFO] [stdout]     | --------------- associated function in this implementation
[INFO] [stdout] 127 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]    --> src/lib.rs:133:8
[INFO] [stdout]     |
[INFO] [stdout] 132 | impl<T: Display + PartialOrd> Pair<T> {
[INFO] [stdout]     | ------------------------------------- method in this implementation
[INFO] [stdout] 133 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Pair` is never constructed
[INFO] [stdout]    --> src/lib.rs:121:12
[INFO] [stdout]     |
[INFO] [stdout] 121 | pub struct Pair<T> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]     = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]    --> src/lib.rs:122:5
[INFO] [stdout]     |
[INFO] [stdout] 121 | pub struct Pair<T> {
[INFO] [stdout]     |            ---- fields in this struct
[INFO] [stdout] 122 |     x: T,
[INFO] [stdout]     |     ^
[INFO] [stdout] 123 |     y: T,
[INFO] [stdout]     |     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `traits` (lib) due to 1 previous error; 3 warnings emitted
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/lib.rs:127:8
[INFO] [stdout]     |
[INFO] [stdout] 126 | impl<T> Pair<T> {
[INFO] [stdout]     | --------------- associated function in this implementation
[INFO] [stdout] 127 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]    --> src/lib.rs:133:8
[INFO] [stdout]     |
[INFO] [stdout] 132 | impl<T: Display + PartialOrd> Pair<T> {
[INFO] [stdout]     | ------------------------------------- method in this implementation
[INFO] [stdout] 133 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `traits` (lib test) due to 1 previous error; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "90b2d581690b177e3e87e00d7fb87b444021ec5bc8579afc4e08160291c4ff06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90b2d581690b177e3e87e00d7fb87b444021ec5bc8579afc4e08160291c4ff06", kill_on_drop: false }`
[INFO] [stdout] 90b2d581690b177e3e87e00d7fb87b444021ec5bc8579afc4e08160291c4ff06