[INFO] cloning repository https://github.com/priyansh71/rust_practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/priyansh71/rust_practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpriyansh71%2Frust_practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpriyansh71%2Frust_practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9b1cb0f27e13c53fd72dd62f2fc2fd4287debacd
[INFO] checking priyansh71/rust_practice against master#c756124775121dea0e640652c5ee3c89e3dd0eb4 for pr-154971-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpriyansh71%2Frust_practice" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/priyansh71/rust_practice
[INFO] finished tweaking git repo https://github.com/priyansh71/rust_practice
[INFO] tweaked toml for git repo https://github.com/priyansh71/rust_practice written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/priyansh71/rust_practice on toolchain c756124775121dea0e640652c5ee3c89e3dd0eb4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c756124775121dea0e640652c5ee3c89e3dd0eb4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/priyansh71/rust_practice 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" "+c756124775121dea0e640652c5ee3c89e3dd0eb4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+c756124775121dea0e640652c5ee3c89e3dd0eb4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 82758698caf03c3e1f7a80fe4ee493acab9681f1d64a15ecd2deda86d8909157
[INFO] running `Command { std: "docker" "start" "-a" "82758698caf03c3e1f7a80fe4ee493acab9681f1d64a15ecd2deda86d8909157", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "82758698caf03c3e1f7a80fe4ee493acab9681f1d64a15ecd2deda86d8909157", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82758698caf03c3e1f7a80fe4ee493acab9681f1d64a15ecd2deda86d8909157", kill_on_drop: false }`
[INFO] [stdout] 82758698caf03c3e1f7a80fe4ee493acab9681f1d64a15ecd2deda86d8909157
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+c756124775121dea0e640652c5ee3c89e3dd0eb4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0207c46e2d26680e00affa7de26c11754766bb57a579e1f14073b2208e3b5f9b
[INFO] running `Command { std: "docker" "start" "-a" "0207c46e2d26680e00affa7de26c11754766bb57a579e1f14073b2208e3b5f9b", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_sandbox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `title` and `content` are never read
[INFO] [stdout]  --> src/advanced/traits.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Article {
[INFO] [stdout]   |            ------- fields in this struct
[INFO] [stdout] 4 |     pub title: String,
[INFO] [stdout]   |         ^^^^^
[INFO] [stdout] 5 |     pub author: String,
[INFO] [stdout] 6 |     pub content: String,
[INFO] [stdout]   |         ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `title` and `content` are never read
[INFO] [stdout]  --> src/advanced/traits.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Article {
[INFO] [stdout]   |            ------- fields in this struct
[INFO] [stdout] 4 |     pub title: String,
[INFO] [stdout]   |         ^^^^^
[INFO] [stdout] 5 |     pub author: String,
[INFO] [stdout] 6 |     pub content: String,
[INFO] [stdout]   |         ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `content`, `reply`, and `retweet` are never read
[INFO] [stdout]   --> src/advanced/traits.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Tweet {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 16 |     pub username: String,
[INFO] [stdout] 17 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 18 |     pub reply: bool,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 19 |     pub retweet: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hell` is never used
[INFO] [stdout]   --> src/advanced/traits.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub fn hell<T : Summary + Clone>(item: T) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `content`, `reply`, and `retweet` are never read
[INFO] [stdout]   --> src/advanced/traits.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Tweet {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 16 |     pub username: String,
[INFO] [stdout] 17 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 18 |     pub reply: bool,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 19 |     pub retweet: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hell` is never used
[INFO] [stdout]   --> src/advanced/traits.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub fn hell<T : Summary + Clone>(item: T) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "0207c46e2d26680e00affa7de26c11754766bb57a579e1f14073b2208e3b5f9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0207c46e2d26680e00affa7de26c11754766bb57a579e1f14073b2208e3b5f9b", kill_on_drop: false }`
[INFO] [stdout] 0207c46e2d26680e00affa7de26c11754766bb57a579e1f14073b2208e3b5f9b