[INFO] cloning repository https://github.com/sh0623k/coding_interview [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sh0623k/coding_interview" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsh0623k%2Fcoding_interview", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsh0623k%2Fcoding_interview'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] ad2a675ba51f91fb104e2272a58badfd5bfa77bc [INFO] checking sh0623k/coding_interview against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsh0623k%2Fcoding_interview" "/workspace/builds/worker-109/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-109/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/sh0623k/coding_interview on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/sh0623k/coding_interview [INFO] finished tweaking git repo https://github.com/sh0623k/coding_interview [INFO] tweaked toml for git repo https://github.com/sh0623k/coding_interview written to /workspace/builds/worker-109/source/Cargo.toml [INFO] crate git repo https://github.com/sh0623k/coding_interview already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "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-109/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 51b0ea5e71896b130ac429360f41df3edf0ecf3ce7b222a583ba739a4fc1cf8b [INFO] running `Command { std: "docker" "start" "-a" "51b0ea5e71896b130ac429360f41df3edf0ecf3ce7b222a583ba739a4fc1cf8b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "51b0ea5e71896b130ac429360f41df3edf0ecf3ce7b222a583ba739a4fc1cf8b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "51b0ea5e71896b130ac429360f41df3edf0ecf3ce7b222a583ba739a4fc1cf8b", kill_on_drop: false }` [INFO] [stdout] 51b0ea5e71896b130ac429360f41df3edf0ecf3ce7b222a583ba739a4fc1cf8b [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 71f8754a7bf2b3bfd40a6773f2226ea6576b9bdea00aec964c4d7779385bf9e1 [INFO] running `Command { std: "docker" "start" "-a" "71f8754a7bf2b3bfd40a6773f2226ea6576b9bdea00aec964c4d7779385bf9e1", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Checking coding_interview v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/linked_list.rs:147:17 [INFO] [stdout] | [INFO] [stdout] 147 | &node.borrow_mut().remove(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 147 | let _ = &node.borrow_mut().remove(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/linked_list.rs:147:17 [INFO] [stdout] | [INFO] [stdout] 147 | &node.borrow_mut().remove(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 147 | let _ = &node.borrow_mut().remove(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/linked_list.rs:405:17 [INFO] [stdout] | [INFO] [stdout] 405 | &node.borrow_mut().remove(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 405 | let _ = &node.borrow_mut().remove(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/ch04p02.rs:10:9 [INFO] [stdout] | [INFO] [stdout] 10 | let mut mbst = MinimalBinarySearchTree::::new(&arr); [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: unused borrow that must be used [INFO] [stdout] --> src/bin/ch02p03.rs:19:13 [INFO] [stdout] | [INFO] [stdout] 19 | &node.borrow_mut().remove(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 19 | let _ = &node.borrow_mut().remove(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/ch04p02.rs:10:9 [INFO] [stdout] | [INFO] [stdout] 10 | let mut mbst = MinimalBinarySearchTree::::new(&arr); [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: unused borrow that must be used [INFO] [stdout] --> src/bin/ch02p03.rs:19:13 [INFO] [stdout] | [INFO] [stdout] 19 | &node.borrow_mut().remove(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 19 | let _ = &node.borrow_mut().remove(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `card` [INFO] [stdout] --> src/bin/ch07p01.rs:112:28 [INFO] [stdout] | [INFO] [stdout] 112 | fn add_card(&mut self, card: BlackJackCard) { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_card` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `completed` [INFO] [stdout] --> src/bin/ch07p02.rs:38:5 [INFO] [stdout] | [INFO] [stdout] 38 | completed: bool, [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `completed` [INFO] [stdout] --> src/bin/ch07p02.rs:38:5 [INFO] [stdout] | [INFO] [stdout] 38 | completed: bool, [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `card` [INFO] [stdout] --> src/bin/ch07p01.rs:112:28 [INFO] [stdout] | [INFO] [stdout] 112 | fn add_card(&mut self, card: BlackJackCard) { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_card` [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/bin/ch07p01.rs:91:13 [INFO] [stdout] | [INFO] [stdout] 91 | let mut value = 0; [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: variable does not need to be mutable [INFO] [stdout] --> src/bin/ch07p01.rs:108:13 [INFO] [stdout] | [INFO] [stdout] 108 | let mut score = 0; [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/ch07p01.rs:136:13 [INFO] [stdout] | [INFO] [stdout] 136 | let mut hand: Vec = vec![]; [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `suit` [INFO] [stdout] --> src/bin/ch07p01.rs:71:5 [INFO] [stdout] | [INFO] [stdout] 71 | suit: Suit, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `rank` [INFO] [stdout] --> src/bin/ch07p01.rs:72:5 [INFO] [stdout] | [INFO] [stdout] 72 | rank: Rank, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `available` [INFO] [stdout] --> src/bin/ch07p01.rs:73:5 [INFO] [stdout] | [INFO] [stdout] 73 | available: bool, [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `cards` [INFO] [stdout] --> src/bin/ch07p01.rs:98:5 [INFO] [stdout] | [INFO] [stdout] 98 | cards: Vec, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [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: variable does not need to be mutable [INFO] [stdout] --> src/bin/ch07p01.rs:91:13 [INFO] [stdout] | [INFO] [stdout] 91 | let mut value = 0; [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: variable does not need to be mutable [INFO] [stdout] --> src/bin/ch07p01.rs:108:13 [INFO] [stdout] | [INFO] [stdout] 108 | let mut score = 0; [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/ch07p01.rs:136:13 [INFO] [stdout] | [INFO] [stdout] 136 | let mut hand: Vec = vec![]; [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `suit` [INFO] [stdout] --> src/bin/ch07p01.rs:71:5 [INFO] [stdout] | [INFO] [stdout] 71 | suit: Suit, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `rank` [INFO] [stdout] --> src/bin/ch07p01.rs:72:5 [INFO] [stdout] | [INFO] [stdout] 72 | rank: Rank, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `available` [INFO] [stdout] --> src/bin/ch07p01.rs:73:5 [INFO] [stdout] | [INFO] [stdout] 73 | available: bool, [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `cards` [INFO] [stdout] --> src/bin/ch07p01.rs:98:5 [INFO] [stdout] | [INFO] [stdout] 98 | cards: Vec, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [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: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1m 04s [INFO] running `Command { std: "docker" "inspect" "71f8754a7bf2b3bfd40a6773f2226ea6576b9bdea00aec964c4d7779385bf9e1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "71f8754a7bf2b3bfd40a6773f2226ea6576b9bdea00aec964c4d7779385bf9e1", kill_on_drop: false }` [INFO] [stdout] 71f8754a7bf2b3bfd40a6773f2226ea6576b9bdea00aec964c4d7779385bf9e1