[INFO] cloning repository https://github.com/gabucito/iterators
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gabucito/iterators" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgabucito%2Fiterators", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgabucito%2Fiterators'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5e9f4e3aa9249bc6c0fd2d2f40ca5804f384c58a
[INFO] testing gabucito/iterators against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgabucito%2Fiterators" "/workspace/builds/worker-19/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-19/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gabucito/iterators on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gabucito/iterators
[INFO] finished tweaking git repo https://github.com/gabucito/iterators
[INFO] tweaked toml for git repo https://github.com/gabucito/iterators written to /workspace/builds/worker-19/source/Cargo.toml
[INFO] crate git repo https://github.com/gabucito/iterators already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 72d1c813e2be6600d6e137da49b7f17a883aca4d7e797c904e28db27ca092f63
[INFO] running `Command { std: "docker" "start" "-a" "72d1c813e2be6600d6e137da49b7f17a883aca4d7e797c904e28db27ca092f63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "72d1c813e2be6600d6e137da49b7f17a883aca4d7e797c904e28db27ca092f63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72d1c813e2be6600d6e137da49b7f17a883aca4d7e797c904e28db27ca092f63", kill_on_drop: false }`
[INFO] [stdout] 72d1c813e2be6600d6e137da49b7f17a883aca4d7e797c904e28db27ca092f63
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 97d7e71f169063fda7c04e6cc1a7621b17d629aae25735fb7226554988054868
[INFO] running `Command { std: "docker" "start" "-a" "97d7e71f169063fda7c04e6cc1a7621b17d629aae25735fb7226554988054868", kill_on_drop: false }`
[INFO] [stderr]    Compiling iterators v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `v_iter`
[INFO] [stdout]   --> src/main.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let mut v_iter = vec.iter(); //
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_v_iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let mut v_iter = vec.iter(); //
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `iterate_mut`
[INFO] [stdout]   --> src/main.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn iterate_mut(mut vec: Vec<i32>) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `Command { std: "docker" "inspect" "97d7e71f169063fda7c04e6cc1a7621b17d629aae25735fb7226554988054868", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97d7e71f169063fda7c04e6cc1a7621b17d629aae25735fb7226554988054868", kill_on_drop: false }`
[INFO] [stdout] 97d7e71f169063fda7c04e6cc1a7621b17d629aae25735fb7226554988054868
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2391accd4040b5bd7a943c020e6dd018df17462caa80d51e4b4664569c64a108
[INFO] running `Command { std: "docker" "start" "-a" "2391accd4040b5bd7a943c020e6dd018df17462caa80d51e4b4664569c64a108", kill_on_drop: false }`
[INFO] [stderr]    Compiling iterators v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `v_iter`
[INFO] [stdout]   --> src/main.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let mut v_iter = vec.iter(); //
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_v_iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let mut v_iter = vec.iter(); //
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `iterate_mut`
[INFO] [stdout]   --> src/main.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn iterate_mut(mut vec: Vec<i32>) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "2391accd4040b5bd7a943c020e6dd018df17462caa80d51e4b4664569c64a108", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2391accd4040b5bd7a943c020e6dd018df17462caa80d51e4b4664569c64a108", kill_on_drop: false }`
[INFO] [stdout] 2391accd4040b5bd7a943c020e6dd018df17462caa80d51e4b4664569c64a108
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9d5fc5e1ecf0c02f284d7dd4b5b8a04825ffba1179726851bcab48196b6b747d
[INFO] running `Command { std: "docker" "start" "-a" "9d5fc5e1ecf0c02f284d7dd4b5b8a04825ffba1179726851bcab48196b6b747d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused variable: `v_iter`
[INFO] [stderr]   --> src/main.rs:58:13
[INFO] [stderr]    |
[INFO] [stderr] 58 |     let mut v_iter = vec.iter(); //
[INFO] [stderr]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_v_iter`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:58:9
[INFO] [stderr]    |
[INFO] [stderr] 58 |     let mut v_iter = vec.iter(); //
[INFO] [stderr]    |         ----^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `iterate_mut`
[INFO] [stderr]   --> src/main.rs:22:4
[INFO] [stderr]    |
[INFO] [stderr] 22 | fn iterate_mut(mut vec: Vec<i32>) {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `iterators` (bin "iterators" test) generated 3 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.56s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/iterators-5c8e31266d46e922)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::iterator_sum ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9d5fc5e1ecf0c02f284d7dd4b5b8a04825ffba1179726851bcab48196b6b747d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d5fc5e1ecf0c02f284d7dd4b5b8a04825ffba1179726851bcab48196b6b747d", kill_on_drop: false }`
[INFO] [stdout] 9d5fc5e1ecf0c02f284d7dd4b5b8a04825ffba1179726851bcab48196b6b747d