[INFO] cloning repository https://github.com/dwinkelman0/RustyChain
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dwinkelman0/RustyChain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdwinkelman0%2FRustyChain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdwinkelman0%2FRustyChain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c2ce83ded8b55672dbdd8b6e1b7bf6481dc985bb
[INFO] checking dwinkelman0/RustyChain against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdwinkelman0%2FRustyChain" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/dwinkelman0/RustyChain
[INFO] finished tweaking git repo https://github.com/dwinkelman0/RustyChain
[INFO] tweaked toml for git repo https://github.com/dwinkelman0/RustyChain written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dwinkelman0/RustyChain on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dwinkelman0/RustyChain 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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 43c8ddceacdcd4b03a4cad2deace09bceae11c2281d1eba5dc0b7ff10ad023af
[INFO] running `Command { std: "docker" "start" "-a" "43c8ddceacdcd4b03a4cad2deace09bceae11c2281d1eba5dc0b7ff10ad023af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "43c8ddceacdcd4b03a4cad2deace09bceae11c2281d1eba5dc0b7ff10ad023af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43c8ddceacdcd4b03a4cad2deace09bceae11c2281d1eba5dc0b7ff10ad023af", kill_on_drop: false }`
[INFO] [stdout] 43c8ddceacdcd4b03a4cad2deace09bceae11c2281d1eba5dc0b7ff10ad023af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 189248e10f757b821844d3cdc3ef346e65d9db7f2308c22517bac84e657757dc
[INFO] running `Command { std: "docker" "start" "-a" "189248e10f757b821844d3cdc3ef346e65d9db7f2308c22517bac84e657757dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking itertools v0.5.10
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking rusty_chain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `units` is never read
[INFO] [stdout]   --> src/main.rs:66:5
[INFO] [stdout]    |
[INFO] [stdout] 64 | struct CompoundUnit<'u> {
[INFO] [stdout]    |        ------------ field in this struct
[INFO] [stdout] 65 |     dimension: Dimension,
[INFO] [stdout] 66 |     units: Vec<(&'u Unit<'u>, i32)>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CompoundUnit` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/main.rs:95:25
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn new(units: Vec<(&'u Unit<'u>, i32)>, name: Option<String>) -> CompoundUnit {
[INFO] [stdout]    |                         ^^      ^^                                   ------------ the lifetime gets resolved as `'u`
[INFO] [stdout]    |                         |       |
[INFO] [stdout]    |                         |       these lifetimes flow to the output
[INFO] [stdout]    |                         these lifetimes flow to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to consistently use `'u`
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn new(units: Vec<(&'u Unit<'u>, i32)>, name: Option<String>) -> CompoundUnit<'u> {
[INFO] [stdout]    |                                                                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `units` is never read
[INFO] [stdout]   --> src/main.rs:66:5
[INFO] [stdout]    |
[INFO] [stdout] 64 | struct CompoundUnit<'u> {
[INFO] [stdout]    |        ------------ field in this struct
[INFO] [stdout] 65 |     dimension: Dimension,
[INFO] [stdout] 66 |     units: Vec<(&'u Unit<'u>, i32)>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CompoundUnit` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/main.rs:95:25
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn new(units: Vec<(&'u Unit<'u>, i32)>, name: Option<String>) -> CompoundUnit {
[INFO] [stdout]    |                         ^^      ^^                                   ------------ the lifetime gets resolved as `'u`
[INFO] [stdout]    |                         |       |
[INFO] [stdout]    |                         |       these lifetimes flow to the output
[INFO] [stdout]    |                         these lifetimes flow to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to consistently use `'u`
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn new(units: Vec<(&'u Unit<'u>, i32)>, name: Option<String>) -> CompoundUnit<'u> {
[INFO] [stdout]    |                                                                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.85s
[INFO] running `Command { std: "docker" "inspect" "189248e10f757b821844d3cdc3ef346e65d9db7f2308c22517bac84e657757dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "189248e10f757b821844d3cdc3ef346e65d9db7f2308c22517bac84e657757dc", kill_on_drop: false }`
[INFO] [stdout] 189248e10f757b821844d3cdc3ef346e65d9db7f2308c22517bac84e657757dc