[INFO] cloning repository https://github.com/edsonmichaque/rust-playground-trait
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/edsonmichaque/rust-playground-trait" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fedsonmichaque%2Frust-playground-trait", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fedsonmichaque%2Frust-playground-trait'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5da0aaab7ec760e0a7159d285a179e7874c29e49
[INFO] checking edsonmichaque/rust-playground-trait against try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fedsonmichaque%2Frust-playground-trait" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/edsonmichaque/rust-playground-trait
[INFO] finished tweaking git repo https://github.com/edsonmichaque/rust-playground-trait
[INFO] tweaked toml for git repo https://github.com/edsonmichaque/rust-playground-trait written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/edsonmichaque/rust-playground-trait 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/edsonmichaque/rust-playground-trait 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] d473529530f96b89b2f93e6c7199a950be2d169e4c6b06cfdaca9dc113c656d1
[INFO] running `Command { std: "docker" "start" "-a" "d473529530f96b89b2f93e6c7199a950be2d169e4c6b06cfdaca9dc113c656d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d473529530f96b89b2f93e6c7199a950be2d169e4c6b06cfdaca9dc113c656d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d473529530f96b89b2f93e6c7199a950be2d169e4c6b06cfdaca9dc113c656d1", kill_on_drop: false }`
[INFO] [stdout] d473529530f96b89b2f93e6c7199a950be2d169e4c6b06cfdaca9dc113c656d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] ca2520f11e8a3b77f1fc8ef1ba24eeec6214beeb54c3410399480b23327536b5
[INFO] running `Command { std: "docker" "start" "-a" "ca2520f11e8a3b77f1fc8ef1ba24eeec6214beeb54c3410399480b23327536b5", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-playground-trait v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `Registry` is never constructed
[INFO] [stdout]   --> src/main.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Registry {
[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: field `entries` is never read
[INFO] [stdout]   --> src/main.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Registry {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 25 |     entries: HashMap<String, Box<dyn ProviderBuilder>>,
[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 items `new` and `find` are never used
[INFO] [stdout]   --> src/main.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl Registry {
[INFO] [stdout]    | ------------- associated items in this implementation
[INFO] [stdout] 29 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn find(&self, s: &String) -> Option<&Box<dyn ProviderBuilder>> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-playground-trait` (bin "rust-playground-trait") due to 1 previous error; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: struct `Registry` is never constructed
[INFO] [stdout]   --> src/main.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Registry {
[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: field `entries` is never read
[INFO] [stdout]   --> src/main.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Registry {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 25 |     entries: HashMap<String, Box<dyn ProviderBuilder>>,
[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 items `new` and `find` are never used
[INFO] [stdout]   --> src/main.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl Registry {
[INFO] [stdout]    | ------------- associated items in this implementation
[INFO] [stdout] 29 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn find(&self, s: &String) -> Option<&Box<dyn ProviderBuilder>> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-playground-trait` (bin "rust-playground-trait" test) due to 1 previous error; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "ca2520f11e8a3b77f1fc8ef1ba24eeec6214beeb54c3410399480b23327536b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca2520f11e8a3b77f1fc8ef1ba24eeec6214beeb54c3410399480b23327536b5", kill_on_drop: false }`
[INFO] [stdout] ca2520f11e8a3b77f1fc8ef1ba24eeec6214beeb54c3410399480b23327536b5
