[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#14e4661efa5acbf985e4fe564baae04683366cc1 for pr-157696
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdwinkelman0%2FRustyChain" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-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-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dwinkelman0/RustyChain on toolchain 14e4661efa5acbf985e4fe564baae04683366cc1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+14e4661efa5acbf985e4fe564baae04683366cc1" "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" "+14e4661efa5acbf985e4fe564baae04683366cc1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3e793bdf10248eb2ddbd6b0faebed8155c11b4589982e2893733958d93e8d540" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 188c7a8978f2f95815381010becf909cb792ba2b621f1cb044c79bb805c2cf67
[INFO] running `Command { std: "docker" "start" "188c7a8978f2f95815381010becf909cb792ba2b621f1cb044c79bb805c2cf67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "188c7a8978f2f95815381010becf909cb792ba2b621f1cb044c79bb805c2cf67" "/opt/rustwide/cargo-home/bin/cargo" "+14e4661efa5acbf985e4fe564baae04683366cc1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "188c7a8978f2f95815381010becf909cb792ba2b621f1cb044c79bb805c2cf67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "188c7a8978f2f95815381010becf909cb792ba2b621f1cb044c79bb805c2cf67" "/opt/rustwide/cargo-home/bin/cargo" "+14e4661efa5acbf985e4fe564baae04683366cc1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]     Checking either v1.5.3
[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)]` (part of `#[warn(unused)]`) on by default
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]   --> src/main.rs:95:70
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn new(units: Vec<(&'u Unit<'u>, i32)>, name: Option<String>) -> CompoundUnit {
[INFO] [stdout]    |                         --      -- the lifetime is named here        ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         the lifetime is named here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: 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: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]   --> src/main.rs:95:70
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn new(units: Vec<(&'u Unit<'u>, i32)>, name: Option<String>) -> CompoundUnit {
[INFO] [stdout]    |                         --      -- the lifetime is named here        ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         the lifetime is named here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: 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 1.79s
[INFO] running `Command { std: "docker" "inspect" "188c7a8978f2f95815381010becf909cb792ba2b621f1cb044c79bb805c2cf67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "188c7a8978f2f95815381010becf909cb792ba2b621f1cb044c79bb805c2cf67", kill_on_drop: false }`
[INFO] [stdout] 188c7a8978f2f95815381010becf909cb792ba2b621f1cb044c79bb805c2cf67
