[INFO] cloning repository https://github.com/huonw/rust-resource-management
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/huonw/rust-resource-management" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhuonw%2Frust-resource-management", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhuonw%2Frust-resource-management'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 62764adb1de5b21832a618046d237646b9ab8012
[INFO] checking huonw/rust-resource-management against try#8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhuonw%2Frust-resource-management" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/huonw/rust-resource-management on toolchain 8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/huonw/rust-resource-management
[INFO] finished tweaking git repo https://github.com/huonw/rust-resource-management
[INFO] tweaked toml for git repo https://github.com/huonw/rust-resource-management written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/huonw/rust-resource-management already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 940d891304c8383562c7c1d0cb72bb40207f6774373ecd638149465695dc6152
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "940d891304c8383562c7c1d0cb72bb40207f6774373ecd638149465695dc6152", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "940d891304c8383562c7c1d0cb72bb40207f6774373ecd638149465695dc6152", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "940d891304c8383562c7c1d0cb72bb40207f6774373ecd638149465695dc6152", kill_on_drop: false }`
[INFO] [stdout] 940d891304c8383562c7c1d0cb72bb40207f6774373ecd638149465695dc6152
[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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f6eaac3bec3b692411e8a583be330d9947ae80d2278456dab33f5db89669c13d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f6eaac3bec3b692411e8a583be330d9947ae80d2278456dab33f5db89669c13d", kill_on_drop: false }`
[INFO] [stderr]     Checking tutorial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> examples/summarise-csv-4.rs:193:53
[INFO] [stdout]     |
[INFO] [stdout] 193 | fn summarise_columns(num_columns: usize, file: &mut (impl std::io::BufRead)) -> Vec<Summary> {
[INFO] [stdout]     |                                                     ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> examples/summarise-csv-5.rs:197:53
[INFO] [stdout]     |
[INFO] [stdout] 197 | fn summarise_columns(num_columns: usize, file: &mut (impl std::io::BufRead)) -> Vec<Summary> {
[INFO] [stdout]     |                                                     ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `headings_line`
[INFO] [stdout]   --> src/bin/borrowing.rs:44:31
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn split_headings_example_csv(headings_line: String) -> Vec<String> {
[INFO] [stdout]    |                               ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_headings_line`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `heading`
[INFO] [stdout]   --> src/bin/borrowing.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     for heading in headings_line.split(',') {
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_heading`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `headings_line`
[INFO] [stdout]   --> src/bin/borrowing.rs:44:31
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn split_headings_example_csv(headings_line: String) -> Vec<String> {
[INFO] [stdout]    |                               ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_headings_line`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `heading`
[INFO] [stdout]   --> src/bin/borrowing.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     for heading in headings_line.split(',') {
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_heading`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file_name`
[INFO] [stdout]   --> src/bin/resource-management.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let file_name = "data/example.csv";
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_name`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file_name`
[INFO] [stdout]   --> src/bin/resource-management.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let file_name = "data/example.csv";
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_name`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> examples/summarise-csv-6.rs:197:53
[INFO] [stdout]     |
[INFO] [stdout] 197 | fn summarise_columns(num_columns: usize, file: &mut (impl std::io::BufRead)) -> Vec<Summary> {
[INFO] [stdout]     |                                                     ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `row`
[INFO] [stdout]    --> src/bin/summarise-csv.rs:200:13
[INFO] [stdout]     |
[INFO] [stdout] 200 |         let row = raw_row.unwrap();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_row`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/bin/summarise-csv.rs:169:23
[INFO] [stdout]     |
[INFO] [stdout] 169 |     fn add(&mut self, value: f64) {
[INFO] [stdout]     |                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `row`
[INFO] [stdout]    --> src/bin/summarise-csv.rs:200:13
[INFO] [stdout]     |
[INFO] [stdout] 200 |         let row = raw_row.unwrap();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_row`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `two_by_three`
[INFO] [stdout]    --> src/bin/summarise-csv.rs:252:9
[INFO] [stdout]     |
[INFO] [stdout] 252 |     let two_by_three: &[u8] = b"2019,61\n2020,62\n2021,9999";
[INFO] [stdout]     |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_two_by_three`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/bin/summarise-csv.rs:169:23
[INFO] [stdout]     |
[INFO] [stdout] 169 |     fn add(&mut self, value: f64) {
[INFO] [stdout]     |                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.17s
[INFO] running `Command { std: "docker" "inspect" "f6eaac3bec3b692411e8a583be330d9947ae80d2278456dab33f5db89669c13d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6eaac3bec3b692411e8a583be330d9947ae80d2278456dab33f5db89669c13d", kill_on_drop: false }`
[INFO] [stdout] f6eaac3bec3b692411e8a583be330d9947ae80d2278456dab33f5db89669c13d