[INFO] fetching crate graphsearch 0.6.0...
[INFO] checking graphsearch-0.6.0 against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] extracting crate graphsearch 0.6.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate graphsearch 0.6.0 on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate graphsearch 0.6.0
[INFO] finished tweaking crates.io crate graphsearch 0.6.0
[INFO] tweaked toml for crates.io crate graphsearch 0.6.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] af94ea4d5eda892213a4d3a65fa9d95d1661c9b032148f9cd50b76117415088f
[INFO] running `Command { std: "docker" "start" "-a" "af94ea4d5eda892213a4d3a65fa9d95d1661c9b032148f9cd50b76117415088f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "af94ea4d5eda892213a4d3a65fa9d95d1661c9b032148f9cd50b76117415088f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af94ea4d5eda892213a4d3a65fa9d95d1661c9b032148f9cd50b76117415088f", kill_on_drop: false }`
[INFO] [stdout] af94ea4d5eda892213a4d3a65fa9d95d1661c9b032148f9cd50b76117415088f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f36981f39709270165f5ea076db1cd40a97bb986a91247f13eb43f22640b52ca
[INFO] running `Command { std: "docker" "start" "-a" "f36981f39709270165f5ea076db1cd40a97bb986a91247f13eb43f22640b52ca", kill_on_drop: false }`
[INFO] [stderr]     Checking graphsearch v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/lib.rs:299:14
[INFO] [stdout]     |
[INFO] [stdout] 299 |     for i in (0..path.len()-1) {
[INFO] [stdout]     |              ^               ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 299 -     for i in (0..path.len()-1) {
[INFO] [stdout] 299 +     for i in 0..path.len()-1 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/lib.rs:320:14
[INFO] [stdout]     |
[INFO] [stdout] 320 |     for i in (0..self.graph.len()) {
[INFO] [stdout]     |              ^                   ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 320 -     for i in (0..self.graph.len()) {
[INFO] [stdout] 320 +     for i in 0..self.graph.len() {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/lib.rs:299:14
[INFO] [stdout]     |
[INFO] [stdout] 299 |     for i in (0..path.len()-1) {
[INFO] [stdout]     |              ^               ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 299 -     for i in (0..path.len()-1) {
[INFO] [stdout] 299 +     for i in 0..path.len()-1 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/lib.rs:320:14
[INFO] [stdout]     |
[INFO] [stdout] 320 |     for i in (0..self.graph.len()) {
[INFO] [stdout]     |              ^                   ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 320 -     for i in (0..self.graph.len()) {
[INFO] [stdout] 320 +     for i in 0..self.graph.len() {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/lib.rs:432:16
[INFO] [stdout]     |
[INFO] [stdout] 432 |       for i in (0..expected_path.len()) { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout]     |                ^                      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 432 -       for i in (0..expected_path.len()) { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout] 432 +       for i in 0..expected_path.len() { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/lib.rs:493:16
[INFO] [stdout]     |
[INFO] [stdout] 493 |       for i in (0..expected_path.len()) { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout]     |                ^                      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 493 -       for i in (0..expected_path.len()) { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout] 493 +       for i in 0..expected_path.len() { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/lib.rs:556:16
[INFO] [stdout]     |
[INFO] [stdout] 556 |       for i in (0..expected_path.len()) { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout]     |                ^                      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 556 -       for i in (0..expected_path.len()) { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout] 556 +       for i in 0..expected_path.len() { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/lib.rs:616:16
[INFO] [stdout]     |
[INFO] [stdout] 616 |       for i in (0..expected_path.len()) { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout]     |                ^                      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 616 -       for i in (0..expected_path.len()) { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout] 616 +       for i in 0..expected_path.len() { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/lib.rs:678:16
[INFO] [stdout]     |
[INFO] [stdout] 678 |       for i in (0..expected_path.len()) { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout]     |                ^                      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 678 -       for i in (0..expected_path.len()) { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout] 678 +       for i in 0..expected_path.len() { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/lib.rs:738:16
[INFO] [stdout]     |
[INFO] [stdout] 738 |       for i in (0..expected_path.len()) { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout]     |                ^                      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 738 -       for i in (0..expected_path.len()) { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout] 738 +       for i in 0..expected_path.len() { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/lib.rs:830:16
[INFO] [stdout]     |
[INFO] [stdout] 830 |       for i in (0..expected_path.len()) { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout]     |                ^                      ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 830 -       for i in (0..expected_path.len()) { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout] 830 +       for i in 0..expected_path.len() { assert_eq!(result[i], expected_path[i]); }
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:352:11
[INFO] [stdout]     |
[INFO] [stdout] 352 |       let mut v: Option<usize>;
[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: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:352:11
[INFO] [stdout]     |
[INFO] [stdout] 352 |       let mut v: Option<usize>;
[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: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "f36981f39709270165f5ea076db1cd40a97bb986a91247f13eb43f22640b52ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f36981f39709270165f5ea076db1cd40a97bb986a91247f13eb43f22640b52ca", kill_on_drop: false }`
[INFO] [stdout] f36981f39709270165f5ea076db1cd40a97bb986a91247f13eb43f22640b52ca