[INFO] cloning repository https://github.com/dcompiler/rust-iterators
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dcompiler/rust-iterators" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdcompiler%2Frust-iterators", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdcompiler%2Frust-iterators'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d141afce8894ae068f9027faddf014d3912f197f
[INFO] checking dcompiler/rust-iterators against try#a611f2a14e38407ec6717a86a01424ee6fc80762 for pr-154992
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdcompiler%2Frust-iterators" "/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/dcompiler/rust-iterators
[INFO] finished tweaking git repo https://github.com/dcompiler/rust-iterators
[INFO] tweaked toml for git repo https://github.com/dcompiler/rust-iterators written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dcompiler/rust-iterators on toolchain a611f2a14e38407ec6717a86a01424ee6fc80762
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a611f2a14e38407ec6717a86a01424ee6fc80762" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dcompiler/rust-iterators 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" "+a611f2a14e38407ec6717a86a01424ee6fc80762" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+a611f2a14e38407ec6717a86a01424ee6fc80762" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 76501932b5a08928b3d9ffb137dab0dea17d0c0d74863d24e6fe96d654d78ee1
[INFO] running `Command { std: "docker" "start" "-a" "76501932b5a08928b3d9ffb137dab0dea17d0c0d74863d24e6fe96d654d78ee1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "76501932b5a08928b3d9ffb137dab0dea17d0c0d74863d24e6fe96d654d78ee1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76501932b5a08928b3d9ffb137dab0dea17d0c0d74863d24e6fe96d654d78ee1", kill_on_drop: false }`
[INFO] [stdout] 76501932b5a08928b3d9ffb137dab0dea17d0c0d74863d24e6fe96d654d78ee1
[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" "+a611f2a14e38407ec6717a86a01424ee6fc80762" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2764a5bc22940f05547dd349d3c0bddf452b1ab704cea24de7bc5b509f86c505
[INFO] running `Command { std: "docker" "start" "-a" "2764a5bc22940f05547dd349d3c0bddf452b1ab704cea24de7bc5b509f86c505", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-iterators v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/lib.rs:32:55
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let total = [(1,2),(2,3)].iter().fold(0,|acc,(k,v)| acc+v);
[INFO] [stdout]    |                                                       ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/lib.rs:49:56
[INFO] [stdout]    |
[INFO] [stdout] 49 |         let prod : i32 = inner2.iter().fold(1, |acc, (&k,&v)| acc*v);
[INFO] [stdout]    |                                                        ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/lib.rs:47:55
[INFO] [stdout]    |
[INFO] [stdout] 47 |         let prod : i32 = inner.iter().fold(1, |acc, (&k,&v)| acc*v);
[INFO] [stdout]    |                                                       ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/lib.rs:41:84
[INFO] [stdout]    |
[INFO] [stdout] 41 |         let inner2 : HashMap<i32,i32> = hm.iter().fold(HashMap::new(), |mut acc, (&k,&v)| {acc.insert(v.0,v.1); acc});
[INFO] [stdout]    |                                                                                    ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PPUC` is never constructed
[INFO] [stdout]  --> src/lib.rs:9:16
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub struct PPUC {
[INFO] [stdout]   |                ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "2764a5bc22940f05547dd349d3c0bddf452b1ab704cea24de7bc5b509f86c505", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2764a5bc22940f05547dd349d3c0bddf452b1ab704cea24de7bc5b509f86c505", kill_on_drop: false }`
[INFO] [stdout] 2764a5bc22940f05547dd349d3c0bddf452b1ab704cea24de7bc5b509f86c505