[INFO] cloning repository https://github.com/McGiver-/rust_practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/McGiver-/rust_practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMcGiver-%2Frust_practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMcGiver-%2Frust_practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c8a73d658f33fc5ce21503726c9815dba08bf932
[INFO] testing McGiver-/rust_practice against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMcGiver-%2Frust_practice" "/workspace/builds/worker-80/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-80/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/McGiver-/rust_practice on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/McGiver-/rust_practice
[INFO] finished tweaking git repo https://github.com/McGiver-/rust_practice
[INFO] tweaked toml for git repo https://github.com/McGiver-/rust_practice written to /workspace/builds/worker-80/source/Cargo.toml
[INFO] crate git repo https://github.com/McGiver-/rust_practice already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "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-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 998c0e435500130ce9506a2eb1df04fde0e01700f1845523d0726ddb2b946147
[INFO] running `Command { std: "docker" "start" "-a" "998c0e435500130ce9506a2eb1df04fde0e01700f1845523d0726ddb2b946147", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "998c0e435500130ce9506a2eb1df04fde0e01700f1845523d0726ddb2b946147", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "998c0e435500130ce9506a2eb1df04fde0e01700f1845523d0726ddb2b946147", kill_on_drop: false }`
[INFO] [stdout] 998c0e435500130ce9506a2eb1df04fde0e01700f1845523d0726ddb2b946147
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1bfc48fb1f3fee198e77f3c754b69b2ed459bcb498dc2524e47b919e232facea
[INFO] running `Command { std: "docker" "start" "-a" "1bfc48fb1f3fee198e77f3c754b69b2ed459bcb498dc2524e47b919e232facea", kill_on_drop: false }`
[INFO] [stderr]    Compiling validate_palindrome v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/main.rs:31:28
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn bracket_balanced<T>(v: &[T],map: HashMap<T,T>) -> bool where
[INFO] [stdout]    |                            ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `map`
[INFO] [stdout]   --> src/main.rs:31:36
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn bracket_balanced<T>(v: &[T],map: HashMap<T,T>) -> bool where
[INFO] [stdout]    |                                    ^^^ help: if this is intentional, prefix it with an underscore: `_map`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.63s
[INFO] running `Command { std: "docker" "inspect" "1bfc48fb1f3fee198e77f3c754b69b2ed459bcb498dc2524e47b919e232facea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bfc48fb1f3fee198e77f3c754b69b2ed459bcb498dc2524e47b919e232facea", kill_on_drop: false }`
[INFO] [stdout] 1bfc48fb1f3fee198e77f3c754b69b2ed459bcb498dc2524e47b919e232facea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 99813877e42658c0a4074a1aa3a37f4cdd00a5ca2e9e63f3f6451b5f613c8030
[INFO] running `Command { std: "docker" "start" "-a" "99813877e42658c0a4074a1aa3a37f4cdd00a5ca2e9e63f3f6451b5f613c8030", kill_on_drop: false }`
[INFO] [stderr]    Compiling validate_palindrome v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/main.rs:31:28
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn bracket_balanced<T>(v: &[T],map: HashMap<T,T>) -> bool where
[INFO] [stdout]    |                            ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `map`
[INFO] [stdout]   --> src/main.rs:31:36
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn bracket_balanced<T>(v: &[T],map: HashMap<T,T>) -> bool where
[INFO] [stdout]    |                                    ^^^ help: if this is intentional, prefix it with an underscore: `_map`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains an unused formatting placeholder
[INFO] [stdout]   --> src/main.rs:63:46
[INFO] [stdout]    |
[INFO] [stdout] 63 |         assert!(balanced("{}".to_string()), "{}");
[INFO] [stdout]    |                                              ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this message is not used as a format string when given without arguments, but will be in Rust 2021
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]    |
[INFO] [stdout] 63 |         assert!(balanced("{}".to_string()), "{}", ...);
[INFO] [stdout]    |                                                 +++++
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 63 |         assert!(balanced("{}".to_string()), "{}", "{}");
[INFO] [stdout]    |                                             +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains braces
[INFO] [stdout]   --> src/main.rs:64:48
[INFO] [stdout]    |
[INFO] [stdout] 64 |         assert!(balanced("{[]}".to_string()), "{[]}");
[INFO] [stdout]    |                                                ^  ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stdout] help: add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 64 |         assert!(balanced("{[]}".to_string()), "{}", "{[]}");
[INFO] [stdout]    |                                               +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains braces
[INFO] [stdout]   --> src/main.rs:65:50
[INFO] [stdout]    |
[INFO] [stdout] 65 |         assert!(balanced("{()[]}".to_string()), "{()[]}");
[INFO] [stdout]    |                                                  ^    ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stdout] help: add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 65 |         assert!(balanced("{()[]}".to_string()), "{}", "{()[]}");
[INFO] [stdout]    |                                                 +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains a brace
[INFO] [stdout]   --> src/main.rs:70:46
[INFO] [stdout]    |
[INFO] [stdout] 70 |         assert!(!balanced("{".to_string()), "{");
[INFO] [stdout]    |                                              ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stdout] help: add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 70 |         assert!(!balanced("{".to_string()), "{}", "{");
[INFO] [stdout]    |                                             +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains a brace
[INFO] [stdout]   --> src/main.rs:71:47
[INFO] [stdout]    |
[INFO] [stdout] 71 |         assert!(!balanced("{)".to_string()), "{)");
[INFO] [stdout]    |                                               ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stdout] help: add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 71 |         assert!(!balanced("{)".to_string()), "{}", "{)");
[INFO] [stdout]    |                                              +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains braces
[INFO] [stdout]   --> src/main.rs:72:53
[INFO] [stdout]    |
[INFO] [stdout] 72 |         assert!(!balanced("{}}{{}{}".to_string()), "{}}{{}{}");
[INFO] [stdout]    |                                                     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stdout] help: add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 72 |         assert!(!balanced("{}}{{}{}".to_string()), "{}", "{}}{{}{}");
[INFO] [stdout]    |                                                    +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains braces
[INFO] [stdout]   --> src/main.rs:73:56
[INFO] [stdout]    |
[INFO] [stdout] 73 |         assert!(!balanced("{()[]}hello".to_string()), "{()[]}hello");
[INFO] [stdout]    |                                                        ^    ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stdout] help: add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 73 |         assert!(!balanced("{()[]}hello".to_string()), "{}", "{()[]}hello");
[INFO] [stdout]    |                                                       +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `Command { std: "docker" "inspect" "99813877e42658c0a4074a1aa3a37f4cdd00a5ca2e9e63f3f6451b5f613c8030", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99813877e42658c0a4074a1aa3a37f4cdd00a5ca2e9e63f3f6451b5f613c8030", kill_on_drop: false }`
[INFO] [stdout] 99813877e42658c0a4074a1aa3a37f4cdd00a5ca2e9e63f3f6451b5f613c8030
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-80/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 59ceb7f201a475fd46f0342337ef560af9a40ce258381f7c1db002a2f8fa970c
[INFO] running `Command { std: "docker" "start" "-a" "59ceb7f201a475fd46f0342337ef560af9a40ce258381f7c1db002a2f8fa970c", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/main.rs:31:28
[INFO] [stderr]    |
[INFO] [stderr] 31 | pub fn bracket_balanced<T>(v: &[T],map: HashMap<T,T>) -> bool where
[INFO] [stderr]    |                            ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `map`
[INFO] [stderr]   --> src/main.rs:31:36
[INFO] [stderr]    |
[INFO] [stderr] 31 | pub fn bracket_balanced<T>(v: &[T],map: HashMap<T,T>) -> bool where
[INFO] [stderr]    |                                    ^^^ help: if this is intentional, prefix it with an underscore: `_map`
[INFO] [stderr] 
[INFO] [stderr] warning: panic message contains an unused formatting placeholder
[INFO] [stderr]   --> src/main.rs:63:46
[INFO] [stderr]    |
[INFO] [stderr] 63 |         assert!(balanced("{}".to_string()), "{}");
[INFO] [stderr]    |                                              ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stderr]    = note: this message is not used as a format string when given without arguments, but will be in Rust 2021
[INFO] [stderr] help: add the missing argument
[INFO] [stderr]    |
[INFO] [stderr] 63 |         assert!(balanced("{}".to_string()), "{}", ...);
[INFO] [stderr]    |                                                 +++++
[INFO] [stderr] help: or add a "{}" format string to use the message literally
[INFO] [stderr]    |
[INFO] [stderr] 63 |         assert!(balanced("{}".to_string()), "{}", "{}");
[INFO] [stderr]    |                                             +++++
[INFO] [stderr] 
[INFO] [stderr] warning: panic message contains braces
[INFO] [stderr]   --> src/main.rs:64:48
[INFO] [stderr]    |
[INFO] [stderr] 64 |         assert!(balanced("{[]}".to_string()), "{[]}");
[INFO] [stderr]    |                                                ^  ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stderr] help: add a "{}" format string to use the message literally
[INFO] [stderr]    |
[INFO] [stderr] 64 |         assert!(balanced("{[]}".to_string()), "{}", "{[]}");
[INFO] [stderr]    |                                               +++++
[INFO] [stderr] 
[INFO] [stderr] warning: panic message contains braces
[INFO] [stderr]   --> src/main.rs:65:50
[INFO] [stderr]    |
[INFO] [stderr] 65 |         assert!(balanced("{()[]}".to_string()), "{()[]}");
[INFO] [stderr]    |                                                  ^    ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stderr] help: add a "{}" format string to use the message literally
[INFO] [stderr]    |
[INFO] [stderr] 65 |         assert!(balanced("{()[]}".to_string()), "{}", "{()[]}");
[INFO] [stderr]    |                                                 +++++
[INFO] [stderr] 
[INFO] [stderr] warning: panic message contains a brace
[INFO] [stderr]   --> src/main.rs:70:46
[INFO] [stderr]    |
[INFO] [stderr] 70 |         assert!(!balanced("{".to_string()), "{");
[INFO] [stderr]    |                                              ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stderr] help: add a "{}" format string to use the message literally
[INFO] [stderr]    |
[INFO] [stderr] 70 |         assert!(!balanced("{".to_string()), "{}", "{");
[INFO] [stderr]    |                                             +++++
[INFO] [stderr] 
[INFO] [stderr] warning: panic message contains a brace
[INFO] [stderr]   --> src/main.rs:71:47
[INFO] [stderr]    |
[INFO] [stderr] 71 |         assert!(!balanced("{)".to_string()), "{)");
[INFO] [stderr]    |                                               ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stderr] help: add a "{}" format string to use the message literally
[INFO] [stderr]    |
[INFO] [stderr] 71 |         assert!(!balanced("{)".to_string()), "{}", "{)");
[INFO] [stderr]    |                                              +++++
[INFO] [stderr] 
[INFO] [stderr] warning: panic message contains braces
[INFO] [stderr]   --> src/main.rs:72:53
[INFO] [stderr]    |
[INFO] [stderr] 72 |         assert!(!balanced("{}}{{}{}".to_string()), "{}}{{}{}");
[INFO] [stderr]    |                                                     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stderr] help: add a "{}" format string to use the message literally
[INFO] [stderr]    |
[INFO] [stderr] 72 |         assert!(!balanced("{}}{{}{}".to_string()), "{}", "{}}{{}{}");
[INFO] [stderr]    |                                                    +++++
[INFO] [stderr] 
[INFO] [stderr] warning: panic message contains braces
[INFO] [stderr]   --> src/main.rs:73:56
[INFO] [stderr]    |
[INFO] [stderr] 73 |         assert!(!balanced("{()[]}hello".to_string()), "{()[]}hello");
[INFO] [stderr]    |                                                        ^    ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stderr] help: add a "{}" format string to use the message literally
[INFO] [stderr]    |
[INFO] [stderr] 73 |         assert!(!balanced("{()[]}hello".to_string()), "{}", "{()[]}hello");
[INFO] [stderr]    |                                                       +++++
[INFO] [stderr] 
[INFO] [stderr] warning: `validate_palindrome` (bin "validate_palindrome" test) generated 9 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/validate_palindrome-8ab4d7891d5593ec)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::balanced_failures ... ok
[INFO] [stdout] test tests::balanced_passes ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "59ceb7f201a475fd46f0342337ef560af9a40ce258381f7c1db002a2f8fa970c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59ceb7f201a475fd46f0342337ef560af9a40ce258381f7c1db002a2f8fa970c", kill_on_drop: false }`
[INFO] [stdout] 59ceb7f201a475fd46f0342337ef560af9a40ce258381f7c1db002a2f8fa970c