[INFO] cloning repository https://github.com/bmxm/rust-demoes
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bmxm/rust-demoes" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbmxm%2Frust-demoes", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbmxm%2Frust-demoes'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ac37934e8b3e87f0cd9abcba518fca62815a6684
[INFO] checking bmxm/rust-demoes against master#0568b0a3de4eb37bf187eb61a9f017ae0018ad8f for pr-101478
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbmxm%2Frust-demoes" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bmxm/rust-demoes on toolchain 0568b0a3de4eb37bf187eb61a9f017ae0018ad8f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0568b0a3de4eb37bf187eb61a9f017ae0018ad8f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bmxm/rust-demoes
[INFO] finished tweaking git repo https://github.com/bmxm/rust-demoes
[INFO] tweaked toml for git repo https://github.com/bmxm/rust-demoes written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/bmxm/rust-demoes already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0568b0a3de4eb37bf187eb61a9f017ae0018ad8f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+0568b0a3de4eb37bf187eb61a9f017ae0018ad8f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] be74621485cd16d0943983cc2de1469f5d5607a2967690b072b2cb50e9a3e465
[INFO] running `Command { std: "docker" "start" "-a" "be74621485cd16d0943983cc2de1469f5d5607a2967690b072b2cb50e9a3e465", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be74621485cd16d0943983cc2de1469f5d5607a2967690b072b2cb50e9a3e465", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be74621485cd16d0943983cc2de1469f5d5607a2967690b072b2cb50e9a3e465", kill_on_drop: false }`
[INFO] [stdout] be74621485cd16d0943983cc2de1469f5d5607a2967690b072b2cb50e9a3e465
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+0568b0a3de4eb37bf187eb61a9f017ae0018ad8f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 34be049b0a29790b3bff96e3b8ac8acd15c21ee08b2a6fd6ba1f2456d7bd2f33
[INFO] running `Command { std: "docker" "start" "-a" "34be049b0a29790b3bff96e3b8ac8acd15c21ee08b2a6fd6ba1f2456d7bd2f33", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-demoes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]  --> src/fn_demo/mod.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn add(x: i32, y :i32) -> i32 {
[INFO] [stdout]   |    ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v2`
[INFO] [stdout]   --> src/generic_demo/mod.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let v2: Vec<u8> = Vec::new();
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_v2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v3`
[INFO] [stdout]   --> src/generic_demo/mod.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let v3 = Vec::<u8>::new();
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_v3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/pattern_destructure_demo/mod.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let (a, b) = (1, 2);
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/pattern_destructure_demo/mod.rs:12:15
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let Point{x, y} = Point{x: 3, y:4};
[INFO] [stdout]    |               ^ help: try ignoring the field: `x: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/pattern_destructure_demo/mod.rs:12:18
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let Point{x, y} = Point{x: 3, y:4};
[INFO] [stdout]    |                  ^ help: try ignoring the field: `y: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `item` is never read
[INFO] [stdout]   --> src/generic_demo/mod.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Container<T> {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 21 |     item: T
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `give_me` is never used
[INFO] [stdout]   --> src/generic_demo/mod.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn give_me<T>(value: T) -> T {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Container` is never constructed
[INFO] [stdout]   --> src/generic_demo/mod.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Container<T> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/generic_demo/mod.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn new(item: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `sum` is never used
[INFO] [stdout]   --> src/generic_demo/mod.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn sum(item: u32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]  --> src/pattern_destructure_demo/mod.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Point {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "34be049b0a29790b3bff96e3b8ac8acd15c21ee08b2a6fd6ba1f2456d7bd2f33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34be049b0a29790b3bff96e3b8ac8acd15c21ee08b2a6fd6ba1f2456d7bd2f33", kill_on_drop: false }`
[INFO] [stdout] 34be049b0a29790b3bff96e3b8ac8acd15c21ee08b2a6fd6ba1f2456d7bd2f33