[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] testing huonw/rust-resource-management against try#28f95933dc0727396c07b48d0a8cb5211b7fb472 for pr-154065-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhuonw%2Frust-resource-management" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[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-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/huonw/rust-resource-management on toolchain 28f95933dc0727396c07b48d0a8cb5211b7fb472
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+28f95933dc0727396c07b48d0a8cb5211b7fb472" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/huonw/rust-resource-management 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" "+28f95933dc0727396c07b48d0a8cb5211b7fb472" "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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+28f95933dc0727396c07b48d0a8cb5211b7fb472" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4c9c78858fecf0d63d7d7aa201096af038977e80ef3cd2e5b4e6efc766856e26
[INFO] running `Command { std: "docker" "start" "-a" "4c9c78858fecf0d63d7d7aa201096af038977e80ef3cd2e5b4e6efc766856e26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c9c78858fecf0d63d7d7aa201096af038977e80ef3cd2e5b4e6efc766856e26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c9c78858fecf0d63d7d7aa201096af038977e80ef3cd2e5b4e6efc766856e26", kill_on_drop: false }`
[INFO] [stdout] 4c9c78858fecf0d63d7d7aa201096af038977e80ef3cd2e5b4e6efc766856e26
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+28f95933dc0727396c07b48d0a8cb5211b7fb472" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 80cca00355fdbc314a4b3dab0b73aa70fd841931c8e29473d9785c3f08b937ef
[INFO] running `Command { std: "docker" "start" "-a" "80cca00355fdbc314a4b3dab0b73aa70fd841931c8e29473d9785c3f08b937ef", kill_on_drop: false }`
[INFO] [stderr]    Compiling tutorial v0.1.0 (/opt/rustwide/workdir)
[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)]` (part of `#[warn(unused)]`) 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: `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]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[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] 
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "80cca00355fdbc314a4b3dab0b73aa70fd841931c8e29473d9785c3f08b937ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80cca00355fdbc314a4b3dab0b73aa70fd841931c8e29473d9785c3f08b937ef", kill_on_drop: false }`
[INFO] [stdout] 80cca00355fdbc314a4b3dab0b73aa70fd841931c8e29473d9785c3f08b937ef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+28f95933dc0727396c07b48d0a8cb5211b7fb472" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5e84b36cc555e457a64d2645bab7132b2ef56d9a436a2049bb35972001d9b1e1
[INFO] running `Command { std: "docker" "start" "-a" "5e84b36cc555e457a64d2645bab7132b2ef56d9a436a2049bb35972001d9b1e1", kill_on_drop: false }`
[INFO] [stderr]    Compiling tutorial v0.1.0 (/opt/rustwide/workdir)
[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]     |                                                     ^                     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 197 - fn summarise_columns(num_columns: usize, file: &mut (impl std::io::BufRead)) -> Vec<Summary> {
[INFO] [stdout] 197 + fn summarise_columns(num_columns: usize, file: &mut impl std::io::BufRead) -> Vec<Summary> {
[INFO] [stdout]     |
[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)]` (part of `#[warn(unused)]`) 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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[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]     |                                                     ^                     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 193 - fn summarise_columns(num_columns: usize, file: &mut (impl std::io::BufRead)) -> Vec<Summary> {
[INFO] [stdout] 193 + fn summarise_columns(num_columns: usize, file: &mut impl std::io::BufRead) -> Vec<Summary> {
[INFO] [stdout]     |
[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]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[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] 
[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: 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]     |                                                     ^                     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 197 - fn summarise_columns(num_columns: usize, file: &mut (impl std::io::BufRead)) -> Vec<Summary> {
[INFO] [stdout] 197 + fn summarise_columns(num_columns: usize, file: &mut impl std::io::BufRead) -> Vec<Summary> {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.93s
[INFO] running `Command { std: "docker" "inspect" "5e84b36cc555e457a64d2645bab7132b2ef56d9a436a2049bb35972001d9b1e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e84b36cc555e457a64d2645bab7132b2ef56d9a436a2049bb35972001d9b1e1", kill_on_drop: false }`
[INFO] [stdout] 5e84b36cc555e457a64d2645bab7132b2ef56d9a436a2049bb35972001d9b1e1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+28f95933dc0727396c07b48d0a8cb5211b7fb472" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0a2cbcb1d476b2d75165c47f6ed187f13b9fe187c28c9fe34c251a875281af29
[INFO] running `Command { std: "docker" "start" "-a" "0a2cbcb1d476b2d75165c47f6ed187f13b9fe187c28c9fe34c251a875281af29", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> examples/summarise-csv-5.rs:197:53
[INFO] [stderr]     |
[INFO] [stderr] 197 | fn summarise_columns(num_columns: usize, file: &mut (impl std::io::BufRead)) -> Vec<Summary> {
[INFO] [stderr]     |                                                     ^                     ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 197 - fn summarise_columns(num_columns: usize, file: &mut (impl std::io::BufRead)) -> Vec<Summary> {
[INFO] [stderr] 197 + fn summarise_columns(num_columns: usize, file: &mut impl std::io::BufRead) -> Vec<Summary> {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `tutorial` (example "summarise-csv-5") generated 1 warning (run `cargo fix --example "summarise-csv-5" -p tutorial` to apply 1 suggestion)
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> examples/summarise-csv-6.rs:197:53
[INFO] [stderr]     |
[INFO] [stderr] 197 | fn summarise_columns(num_columns: usize, file: &mut (impl std::io::BufRead)) -> Vec<Summary> {
[INFO] [stderr]     |                                                     ^                     ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 197 - fn summarise_columns(num_columns: usize, file: &mut (impl std::io::BufRead)) -> Vec<Summary> {
[INFO] [stderr] 197 + fn summarise_columns(num_columns: usize, file: &mut impl std::io::BufRead) -> Vec<Summary> {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]    --> src/bin/summarise-csv.rs:169:23
[INFO] [stderr]     |
[INFO] [stderr] 169 |     fn add(&mut self, value: f64) {
[INFO] [stderr]     |                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `row`
[INFO] [stderr]    --> src/bin/summarise-csv.rs:200:13
[INFO] [stderr]     |
[INFO] [stderr] 200 |         let row = raw_row.unwrap();
[INFO] [stderr]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_row`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `two_by_three`
[INFO] [stderr]    --> src/bin/summarise-csv.rs:252:9
[INFO] [stderr]     |
[INFO] [stderr] 252 |     let two_by_three: &[u8] = b"2019,61\n2020,62\n2021,9999";
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_two_by_three`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `headings_line`
[INFO] [stderr]   --> src/bin/borrowing.rs:44:31
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn split_headings_example_csv(headings_line: String) -> Vec<String> {
[INFO] [stderr]    |                               ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_headings_line`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `heading`
[INFO] [stderr]   --> src/bin/borrowing.rs:67:9
[INFO] [stderr]    |
[INFO] [stderr] 67 |     for heading in headings_line.split(',') {
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_heading`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `file_name`
[INFO] [stderr]   --> src/bin/resource-management.rs:58:9
[INFO] [stderr]    |
[INFO] [stderr] 58 |     let file_name = "data/example.csv";
[INFO] [stderr]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_name`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `tutorial` (example "summarise-csv-6") generated 1 warning (run `cargo fix --example "summarise-csv-6" -p tutorial` to apply 1 suggestion)
[INFO] [stderr] warning: `tutorial` (bin "summarise-csv" test) generated 3 warnings (run `cargo fix --bin "summarise-csv" -p tutorial --tests` to apply 3 suggestions)
[INFO] [stderr] warning: `tutorial` (bin "borrowing" test) generated 2 warnings (run `cargo fix --bin "borrowing" -p tutorial --tests` to apply 2 suggestions)
[INFO] [stderr] warning: `tutorial` (bin "resource-management" test) generated 1 warning (run `cargo fix --bin "resource-management" -p tutorial --tests` to apply 1 suggestion)
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> examples/summarise-csv-4.rs:193:53
[INFO] [stderr]     |
[INFO] [stderr] 193 | fn summarise_columns(num_columns: usize, file: &mut (impl std::io::BufRead)) -> Vec<Summary> {
[INFO] [stderr]     |                                                     ^                     ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 193 - fn summarise_columns(num_columns: usize, file: &mut (impl std::io::BufRead)) -> Vec<Summary> {
[INFO] [stderr] 193 + fn summarise_columns(num_columns: usize, file: &mut impl std::io::BufRead) -> Vec<Summary> {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `tutorial` (example "summarise-csv-4") generated 1 warning (run `cargo fix --example "summarise-csv-4" -p tutorial` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/bin/borrowing.rs (/opt/rustwide/target/debug/deps/borrowing-d22edfd35d8cc0d5)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test_split_headings_loop ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- test_split_headings_loop stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'test_split_headings_loop' (17) panicked at src/bin/borrowing.rs:91:5:
[INFO] [stdout] not implemented
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x62e739be4448 - std[d054f6f42beb1baa]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x62e739be4448 - std[d054f6f42beb1baa]::backtrace_rs::backtrace::trace_unsynchronized::<std[d054f6f42beb1baa]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x62e739be4448 - std[d054f6f42beb1baa]::sys::backtrace::_print_fmt
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x62e739be4448 - <<std[d054f6f42beb1baa]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[5a1c3e9896636f3a]::fmt::Display>::fmt
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x62e739bf820a - <core[5a1c3e9896636f3a]::fmt::rt::Argument>::fmt
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x62e739bf820a - core[5a1c3e9896636f3a]::fmt::write
[INFO] [stdout]    6:     0x62e739be8c62 - std[d054f6f42beb1baa]::io::default_write_fmt::<alloc[154f689e5dd3bae5]::vec::Vec<u8>>
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/io/mod.rs:622:11
[INFO] [stdout]    7:     0x62e739be8c62 - <alloc[154f689e5dd3bae5]::vec::Vec<u8> as std[d054f6f42beb1baa]::io::Write>::write_fmt
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/io/mod.rs:1977:13
[INFO] [stdout]    8:     0x62e739bc35f6 - <std[d054f6f42beb1baa]::sys::backtrace::BacktraceLock>::print
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x62e739bc35f6 - std[d054f6f42beb1baa]::panicking::default_hook::{closure#0}
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x62e739bdc9e9 - std[d054f6f42beb1baa]::panicking::default_hook
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x62e739b78a4c - <alloc[154f689e5dd3bae5]::boxed::Box<dyn for<'a, 'b> core[5a1c3e9896636f3a]::ops::function::Fn<(&'a std[d054f6f42beb1baa]::panic::PanicHookInfo<'b>,), Output = ()> + core[5a1c3e9896636f3a]::marker::Send + core[5a1c3e9896636f3a]::marker::Sync> as core[5a1c3e9896636f3a]::ops::function::Fn<(&std[d054f6f42beb1baa]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/alloc/src/boxed.rs:2291:9
[INFO] [stdout]   12:     0x62e739b78a4c - test[fad20673b750c10e]::test_main_inner::<test[fad20673b750c10e]::test_main_static::{closure#0}>::{closure#0}
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/test/src/lib.rs:155:21
[INFO] [stdout]   13:     0x62e739bdcba2 - <alloc[154f689e5dd3bae5]::boxed::Box<dyn for<'a, 'b> core[5a1c3e9896636f3a]::ops::function::Fn<(&'a std[d054f6f42beb1baa]::panic::PanicHookInfo<'b>,), Output = ()> + core[5a1c3e9896636f3a]::marker::Send + core[5a1c3e9896636f3a]::marker::Sync> as core[5a1c3e9896636f3a]::ops::function::Fn<(&std[d054f6f42beb1baa]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/alloc/src/boxed.rs:2291:9
[INFO] [stdout]   14:     0x62e739bdcba2 - std[d054f6f42beb1baa]::panicking::panic_with_hook
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x62e739bc36e4 - std[d054f6f42beb1baa]::panicking::panic_handler::{closure#0}
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/panicking.rs:691:13
[INFO] [stdout]   16:     0x62e739bbb049 - std[d054f6f42beb1baa]::sys::backtrace::__rust_end_short_backtrace::<std[d054f6f42beb1baa]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x62e739bc43cd - __rustc[7ab284efd7f33ea8]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x62e739bf88fc - core[5a1c3e9896636f3a]::panicking::panic_fmt
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x62e739bf88c2 - core[5a1c3e9896636f3a]::panicking::panic
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/core/src/panicking.rs:150:5
[INFO] [stdout]   20:     0x62e739b6b2ca - borrowing[37fd045c90bb3280]::test_split_headings_loop
[INFO] [stdout]                                at /opt/rustwide/workdir/src/bin/borrowing.rs:91:5
[INFO] [stdout]   21:     0x62e739b6b247 - borrowing[37fd045c90bb3280]::test_split_headings_loop::{closure#0}
[INFO] [stdout]                                at /opt/rustwide/workdir/src/bin/borrowing.rs:75:30
[INFO] [stdout]   22:     0x62e739b6ba56 - <borrowing[37fd045c90bb3280]::test_split_headings_loop::{closure#0} as core[5a1c3e9896636f3a]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x62e739b6bb2b - <fn() -> core[5a1c3e9896636f3a]::result::Result<(), alloc[154f689e5dd3bae5]::string::String> as core[5a1c3e9896636f3a]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x62e739b6bb2b - test[fad20673b750c10e]::__rust_begin_short_backtrace::<core[5a1c3e9896636f3a]::result::Result<(), alloc[154f689e5dd3bae5]::string::String>, fn() -> core[5a1c3e9896636f3a]::result::Result<(), alloc[154f689e5dd3bae5]::string::String>>
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/test/src/lib.rs:724:18
[INFO] [stdout]   25:     0x62e739b793a5 - test[fad20673b750c10e]::run_test_in_process::{closure#0}
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/test/src/lib.rs:747:74
[INFO] [stdout]   26:     0x62e739b793a5 - <core[5a1c3e9896636f3a]::panic::unwind_safe::AssertUnwindSafe<test[fad20673b750c10e]::run_test_in_process::{closure#0}> as core[5a1c3e9896636f3a]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/core/src/panic/unwind_safe.rs:275:9
[INFO] [stdout]   27:     0x62e739b793a5 - std[d054f6f42beb1baa]::panicking::catch_unwind::do_call::<core[5a1c3e9896636f3a]::panic::unwind_safe::AssertUnwindSafe<test[fad20673b750c10e]::run_test_in_process::{closure#0}>, core[5a1c3e9896636f3a]::result::Result<(), alloc[154f689e5dd3bae5]::string::String>>
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/panicking.rs:581:40
[INFO] [stdout]   28:     0x62e739b793a5 - std[d054f6f42beb1baa]::panicking::catch_unwind::<core[5a1c3e9896636f3a]::result::Result<(), alloc[154f689e5dd3bae5]::string::String>, core[5a1c3e9896636f3a]::panic::unwind_safe::AssertUnwindSafe<test[fad20673b750c10e]::run_test_in_process::{closure#0}>>
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/panicking.rs:544:19
[INFO] [stdout]   29:     0x62e739b793a5 - std[d054f6f42beb1baa]::panic::catch_unwind::<core[5a1c3e9896636f3a]::panic::unwind_safe::AssertUnwindSafe<test[fad20673b750c10e]::run_test_in_process::{closure#0}>, core[5a1c3e9896636f3a]::result::Result<(), alloc[154f689e5dd3bae5]::string::String>>
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/panic.rs:359:14
[INFO] [stdout]   30:     0x62e739b793a5 - test[fad20673b750c10e]::run_test_in_process
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/test/src/lib.rs:747:27
[INFO] [stdout]   31:     0x62e739b793a5 - test[fad20673b750c10e]::run_test::{closure#0}
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/test/src/lib.rs:668:43
[INFO] [stdout]   32:     0x62e739b73f04 - test[fad20673b750c10e]::run_test::{closure#1}
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/test/src/lib.rs:698:41
[INFO] [stdout]   33:     0x62e739b73f04 - std[d054f6f42beb1baa]::sys::backtrace::__rust_begin_short_backtrace::<test[fad20673b750c10e]::run_test::{closure#1}, ()>
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   34:     0x62e739b7c422 - std[d054f6f42beb1baa]::thread::lifecycle::spawn_unchecked::<test[fad20673b750c10e]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/thread/lifecycle.rs:70:13
[INFO] [stdout]   35:     0x62e739b7c422 - <core[5a1c3e9896636f3a]::panic::unwind_safe::AssertUnwindSafe<std[d054f6f42beb1baa]::thread::lifecycle::spawn_unchecked<test[fad20673b750c10e]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}> as core[5a1c3e9896636f3a]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/core/src/panic/unwind_safe.rs:275:9
[INFO] [stdout]   36:     0x62e739b7c422 - std[d054f6f42beb1baa]::panicking::catch_unwind::do_call::<core[5a1c3e9896636f3a]::panic::unwind_safe::AssertUnwindSafe<std[d054f6f42beb1baa]::thread::lifecycle::spawn_unchecked<test[fad20673b750c10e]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/panicking.rs:581:40
[INFO] [stdout]   37:     0x62e739b7c422 - std[d054f6f42beb1baa]::panicking::catch_unwind::<(), core[5a1c3e9896636f3a]::panic::unwind_safe::AssertUnwindSafe<std[d054f6f42beb1baa]::thread::lifecycle::spawn_unchecked<test[fad20673b750c10e]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>>
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/panicking.rs:544:19
[INFO] [stdout]   38:     0x62e739b7c422 - std[d054f6f42beb1baa]::panic::catch_unwind::<core[5a1c3e9896636f3a]::panic::unwind_safe::AssertUnwindSafe<std[d054f6f42beb1baa]::thread::lifecycle::spawn_unchecked<test[fad20673b750c10e]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/panic.rs:359:14
[INFO] [stdout]   39:     0x62e739b7c422 - std[d054f6f42beb1baa]::thread::lifecycle::spawn_unchecked::<test[fad20673b750c10e]::run_test::{closure#1}, ()>::{closure#1}
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/thread/lifecycle.rs:68:26
[INFO] [stdout]   40:     0x62e739b7c422 - <std[d054f6f42beb1baa]::thread::lifecycle::spawn_unchecked<test[fad20673b750c10e]::run_test::{closure#1}, ()>::{closure#1} as core[5a1c3e9896636f3a]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x62e739be3daf - <alloc[154f689e5dd3bae5]::boxed::Box<dyn core[5a1c3e9896636f3a]::ops::function::FnOnce<(), Output = ()> + core[5a1c3e9896636f3a]::marker::Send> as core[5a1c3e9896636f3a]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/alloc/src/boxed.rs:2277:9
[INFO] [stdout]   42:     0x62e739be3daf - <std[d054f6f42beb1baa]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]                                at /rustc/28f95933dc0727396c07b48d0a8cb5211b7fb472/library/std/src/sys/thread/unix.rs:118:17
[INFO] [stdout]   43:     0x7d78c6c4aaa4 - <unknown>
[INFO] [stdout]   44:     0x7d78c6cd7a64 - clone
[INFO] [stdout]   45:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     test_split_headings_loop
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin borrowing`
[INFO] running `Command { std: "docker" "inspect" "0a2cbcb1d476b2d75165c47f6ed187f13b9fe187c28c9fe34c251a875281af29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a2cbcb1d476b2d75165c47f6ed187f13b9fe187c28c9fe34c251a875281af29", kill_on_drop: false }`
[INFO] [stdout] 0a2cbcb1d476b2d75165c47f6ed187f13b9fe187c28c9fe34c251a875281af29
