[INFO] cloning repository https://github.com/CMU-Blockchain-Group/rust-workshop-0 [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/CMU-Blockchain-Group/rust-workshop-0" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCMU-Blockchain-Group%2Frust-workshop-0", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCMU-Blockchain-Group%2Frust-workshop-0'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 88e8e82df47bb6e2955ab850f906248baad9c8fe [INFO] testing CMU-Blockchain-Group/rust-workshop-0 against beta-2022-02-22 for beta-1.60-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCMU-Blockchain-Group%2Frust-workshop-0" "/workspace/builds/worker-28/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-28/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/CMU-Blockchain-Group/rust-workshop-0 on toolchain beta-2022-02-22 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/CMU-Blockchain-Group/rust-workshop-0 [INFO] finished tweaking git repo https://github.com/CMU-Blockchain-Group/rust-workshop-0 [INFO] tweaked toml for git repo https://github.com/CMU-Blockchain-Group/rust-workshop-0 written to /workspace/builds/worker-28/source/Cargo.toml [INFO] crate git repo https://github.com/CMU-Blockchain-Group/rust-workshop-0 already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "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-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 1ffc61f5043241d62f994f5aa4d4df67976306485601923a00f904a242b4c7a2 [INFO] running `Command { std: "docker" "start" "-a" "1ffc61f5043241d62f994f5aa4d4df67976306485601923a00f904a242b4c7a2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "1ffc61f5043241d62f994f5aa4d4df67976306485601923a00f904a242b4c7a2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1ffc61f5043241d62f994f5aa4d4df67976306485601923a00f904a242b4c7a2", kill_on_drop: false }` [INFO] [stdout] 1ffc61f5043241d62f994f5aa4d4df67976306485601923a00f904a242b4c7a2 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 0d7b3fd8bd1525d473e3d83ec4fc1392150383486784ab1b895c9cc3927e020a [INFO] running `Command { std: "docker" "start" "-a" "0d7b3fd8bd1525d473e3d83ec4fc1392150383486784ab1b895c9cc3927e020a", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling rust-workshop-0 v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `buf` [INFO] [stdout] --> src/main.rs:17:9 [INFO] [stdout] | [INFO] [stdout] 17 | let buf = string_to_mine.as_bytes(); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_buf` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/exercises.rs:3:18 [INFO] [stdout] | [INFO] [stdout] 3 | fn swap_two_ints(a: &mut i32, b: &mut i32) { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> src/exercises.rs:3:31 [INFO] [stdout] | [INFO] [stdout] 3 | fn swap_two_ints(a: &mut i32, b: &mut i32) { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/exercises.rs:14:18 [INFO] [stdout] | [INFO] [stdout] 14 | fn rect_overlaps(a: &Rectangle, b: &Rectangle) -> bool { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> src/exercises.rs:14:33 [INFO] [stdout] | [INFO] [stdout] 14 | fn rect_overlaps(a: &Rectangle, b: &Rectangle) -> bool { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `play` [INFO] [stdout] --> src/exercises.rs:27:17 [INFO] [stdout] | [INFO] [stdout] 27 | fn rps_weakness(play: RockPaperScissors) -> RockPaperScissors { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_play` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/exercises.rs:34:16 [INFO] [stdout] | [INFO] [stdout] 34 | fn dot_product(a: &[i32], b: &[i32]) -> i32 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> src/exercises.rs:34:27 [INFO] [stdout] | [INFO] [stdout] 34 | fn dot_product(a: &[i32], b: &[i32]) -> i32 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `n` [INFO] [stdout] --> src/exercises.rs:40:16 [INFO] [stdout] | [INFO] [stdout] 40 | fn first_n_fib(n: usize) -> Vec { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_n` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/exercises.rs:48:28 [INFO] [stdout] | [INFO] [stdout] 48 | fn recursive_binary_search(a: &[i32]) -> Option { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `strs` [INFO] [stdout] --> src/exercises.rs:55:28 [INFO] [stdout] | [INFO] [stdout] 55 | fn flatten_slice_of_slices(strs: &[&[&str]]) -> String { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_strs` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant is never used: `DIFFICULTY` [INFO] [stdout] --> src/main.rs:4:1 [INFO] [stdout] | [INFO] [stdout] 4 | const DIFFICULTY: usize = 4; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `swap_two_ints` [INFO] [stdout] --> src/exercises.rs:3:4 [INFO] [stdout] | [INFO] [stdout] 3 | fn swap_two_ints(a: &mut i32, b: &mut i32) { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct is never constructed: `Rectangle` [INFO] [stdout] --> src/exercises.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 8 | struct Rectangle { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `rect_overlaps` [INFO] [stdout] --> src/exercises.rs:14:4 [INFO] [stdout] | [INFO] [stdout] 14 | fn rect_overlaps(a: &Rectangle, b: &Rectangle) -> bool { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum is never used: `RockPaperScissors` [INFO] [stdout] --> src/exercises.rs:19:6 [INFO] [stdout] | [INFO] [stdout] 19 | enum RockPaperScissors { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `rps_weakness` [INFO] [stdout] --> src/exercises.rs:27:4 [INFO] [stdout] | [INFO] [stdout] 27 | fn rps_weakness(play: RockPaperScissors) -> RockPaperScissors { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `dot_product` [INFO] [stdout] --> src/exercises.rs:34:4 [INFO] [stdout] | [INFO] [stdout] 34 | fn dot_product(a: &[i32], b: &[i32]) -> i32 { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `first_n_fib` [INFO] [stdout] --> src/exercises.rs:40:4 [INFO] [stdout] | [INFO] [stdout] 40 | fn first_n_fib(n: usize) -> Vec { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `recursive_binary_search` [INFO] [stdout] --> src/exercises.rs:48:4 [INFO] [stdout] | [INFO] [stdout] 48 | fn recursive_binary_search(a: &[i32]) -> Option { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `flatten_slice_of_slices` [INFO] [stdout] --> src/exercises.rs:55:4 [INFO] [stdout] | [INFO] [stdout] 55 | fn flatten_slice_of_slices(strs: &[&[&str]]) -> String { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 9.68s [INFO] [stdout] warning: 21 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "0d7b3fd8bd1525d473e3d83ec4fc1392150383486784ab1b895c9cc3927e020a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0d7b3fd8bd1525d473e3d83ec4fc1392150383486784ab1b895c9cc3927e020a", kill_on_drop: false }` [INFO] [stdout] 0d7b3fd8bd1525d473e3d83ec4fc1392150383486784ab1b895c9cc3927e020a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] c3dd7e7d4d2913f2efa6017eb27b9b945a8e4ef6d40d8f7c40080359cb48ebda [INFO] running `Command { std: "docker" "start" "-a" "c3dd7e7d4d2913f2efa6017eb27b9b945a8e4ef6d40d8f7c40080359cb48ebda", kill_on_drop: false }` [INFO] [stderr] Compiling rust-workshop-0 v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `buf` [INFO] [stdout] --> src/main.rs:17:9 [INFO] [stdout] | [INFO] [stdout] 17 | let buf = string_to_mine.as_bytes(); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_buf` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/exercises.rs:3:18 [INFO] [stdout] | [INFO] [stdout] 3 | fn swap_two_ints(a: &mut i32, b: &mut i32) { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> src/exercises.rs:3:31 [INFO] [stdout] | [INFO] [stdout] 3 | fn swap_two_ints(a: &mut i32, b: &mut i32) { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/exercises.rs:14:18 [INFO] [stdout] | [INFO] [stdout] 14 | fn rect_overlaps(a: &Rectangle, b: &Rectangle) -> bool { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> src/exercises.rs:14:33 [INFO] [stdout] | [INFO] [stdout] 14 | fn rect_overlaps(a: &Rectangle, b: &Rectangle) -> bool { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `play` [INFO] [stdout] --> src/exercises.rs:27:17 [INFO] [stdout] | [INFO] [stdout] 27 | fn rps_weakness(play: RockPaperScissors) -> RockPaperScissors { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_play` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/exercises.rs:34:16 [INFO] [stdout] | [INFO] [stdout] 34 | fn dot_product(a: &[i32], b: &[i32]) -> i32 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> src/exercises.rs:34:27 [INFO] [stdout] | [INFO] [stdout] 34 | fn dot_product(a: &[i32], b: &[i32]) -> i32 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `n` [INFO] [stdout] --> src/exercises.rs:40:16 [INFO] [stdout] | [INFO] [stdout] 40 | fn first_n_fib(n: usize) -> Vec { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_n` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/exercises.rs:48:28 [INFO] [stdout] | [INFO] [stdout] 48 | fn recursive_binary_search(a: &[i32]) -> Option { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `strs` [INFO] [stdout] --> src/exercises.rs:55:28 [INFO] [stdout] | [INFO] [stdout] 55 | fn flatten_slice_of_slices(strs: &[&[&str]]) -> String { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_strs` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant is never used: `DIFFICULTY` [INFO] [stdout] --> src/main.rs:4:1 [INFO] [stdout] | [INFO] [stdout] 4 | const DIFFICULTY: usize = 4; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct is never constructed: `Rectangle` [INFO] [stdout] --> src/exercises.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 8 | struct Rectangle { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `rect_overlaps` [INFO] [stdout] --> src/exercises.rs:14:4 [INFO] [stdout] | [INFO] [stdout] 14 | fn rect_overlaps(a: &Rectangle, b: &Rectangle) -> bool { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum is never used: `RockPaperScissors` [INFO] [stdout] --> src/exercises.rs:19:6 [INFO] [stdout] | [INFO] [stdout] 19 | enum RockPaperScissors { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `rps_weakness` [INFO] [stdout] --> src/exercises.rs:27:4 [INFO] [stdout] | [INFO] [stdout] 27 | fn rps_weakness(play: RockPaperScissors) -> RockPaperScissors { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `dot_product` [INFO] [stdout] --> src/exercises.rs:34:4 [INFO] [stdout] | [INFO] [stdout] 34 | fn dot_product(a: &[i32], b: &[i32]) -> i32 { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `first_n_fib` [INFO] [stdout] --> src/exercises.rs:40:4 [INFO] [stdout] | [INFO] [stdout] 40 | fn first_n_fib(n: usize) -> Vec { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `recursive_binary_search` [INFO] [stdout] --> src/exercises.rs:48:4 [INFO] [stdout] | [INFO] [stdout] 48 | fn recursive_binary_search(a: &[i32]) -> Option { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `flatten_slice_of_slices` [INFO] [stdout] --> src/exercises.rs:55:4 [INFO] [stdout] | [INFO] [stdout] 55 | fn flatten_slice_of_slices(strs: &[&[&str]]) -> String { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 20 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.54s [INFO] running `Command { std: "docker" "inspect" "c3dd7e7d4d2913f2efa6017eb27b9b945a8e4ef6d40d8f7c40080359cb48ebda", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c3dd7e7d4d2913f2efa6017eb27b9b945a8e4ef6d40d8f7c40080359cb48ebda", kill_on_drop: false }` [INFO] [stdout] c3dd7e7d4d2913f2efa6017eb27b9b945a8e4ef6d40d8f7c40080359cb48ebda [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] d1e8f89bedcae1e35dffb21f3b3e904392c2b3f7357ea07dcbc9248d8714edc0 [INFO] running `Command { std: "docker" "start" "-a" "d1e8f89bedcae1e35dffb21f3b3e904392c2b3f7357ea07dcbc9248d8714edc0", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] warning: unused variable: `buf` [INFO] [stderr] --> src/main.rs:17:9 [INFO] [stderr] | [INFO] [stderr] 17 | let buf = string_to_mine.as_bytes(); [INFO] [stderr] | ^^^ help: if this is intentional, prefix it with an underscore: `_buf` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/exercises.rs:3:18 [INFO] [stderr] | [INFO] [stderr] 3 | fn swap_two_ints(a: &mut i32, b: &mut i32) { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `b` [INFO] [stderr] --> src/exercises.rs:3:31 [INFO] [stderr] | [INFO] [stderr] 3 | fn swap_two_ints(a: &mut i32, b: &mut i32) { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/exercises.rs:14:18 [INFO] [stderr] | [INFO] [stderr] 14 | fn rect_overlaps(a: &Rectangle, b: &Rectangle) -> bool { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `b` [INFO] [stderr] --> src/exercises.rs:14:33 [INFO] [stderr] | [INFO] [stderr] 14 | fn rect_overlaps(a: &Rectangle, b: &Rectangle) -> bool { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `play` [INFO] [stderr] --> src/exercises.rs:27:17 [INFO] [stderr] | [INFO] [stderr] 27 | fn rps_weakness(play: RockPaperScissors) -> RockPaperScissors { [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_play` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/exercises.rs:34:16 [INFO] [stderr] | [INFO] [stderr] 34 | fn dot_product(a: &[i32], b: &[i32]) -> i32 { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `b` [INFO] [stderr] --> src/exercises.rs:34:27 [INFO] [stderr] | [INFO] [stderr] 34 | fn dot_product(a: &[i32], b: &[i32]) -> i32 { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `n` [INFO] [stderr] --> src/exercises.rs:40:16 [INFO] [stderr] | [INFO] [stderr] 40 | fn first_n_fib(n: usize) -> Vec { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_n` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/exercises.rs:48:28 [INFO] [stderr] | [INFO] [stderr] 48 | fn recursive_binary_search(a: &[i32]) -> Option { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `strs` [INFO] [stderr] --> src/exercises.rs:55:28 [INFO] [stderr] | [INFO] [stderr] 55 | fn flatten_slice_of_slices(strs: &[&[&str]]) -> String { [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_strs` [INFO] [stderr] [INFO] [stderr] warning: constant is never used: `DIFFICULTY` [INFO] [stderr] --> src/main.rs:4:1 [INFO] [stderr] | [INFO] [stderr] 4 | const DIFFICULTY: usize = 4; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `Rectangle` [INFO] [stderr] --> src/exercises.rs:8:8 [INFO] [stderr] | [INFO] [stderr] 8 | struct Rectangle { [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `rect_overlaps` [INFO] [stderr] --> src/exercises.rs:14:4 [INFO] [stderr] | [INFO] [stderr] 14 | fn rect_overlaps(a: &Rectangle, b: &Rectangle) -> bool { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: enum is never used: `RockPaperScissors` [INFO] [stderr] --> src/exercises.rs:19:6 [INFO] [stderr] | [INFO] [stderr] 19 | enum RockPaperScissors { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `rps_weakness` [INFO] [stderr] --> src/exercises.rs:27:4 [INFO] [stderr] | [INFO] [stderr] 27 | fn rps_weakness(play: RockPaperScissors) -> RockPaperScissors { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `dot_product` [INFO] [stderr] --> src/exercises.rs:34:4 [INFO] [stderr] | [INFO] [stderr] 34 | fn dot_product(a: &[i32], b: &[i32]) -> i32 { [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `first_n_fib` [INFO] [stderr] --> src/exercises.rs:40:4 [INFO] [stderr] | [INFO] [stderr] 40 | fn first_n_fib(n: usize) -> Vec { [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `recursive_binary_search` [INFO] [stderr] --> src/exercises.rs:48:4 [INFO] [stderr] | [INFO] [stderr] 48 | fn recursive_binary_search(a: &[i32]) -> Option { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `flatten_slice_of_slices` [INFO] [stderr] --> src/exercises.rs:55:4 [INFO] [stderr] | [INFO] [stderr] 55 | fn flatten_slice_of_slices(strs: &[&[&str]]) -> String { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: `rust-workshop-0` (bin "rust-workshop-0" test) generated 20 warnings [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 4m 27s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/rust_workshop_0-4806e5dea088fc25) [INFO] [stdout] [INFO] [stdout] running 1 test [INFO] [stdout] test exercises::tests::test_swap_two_ints ... FAILED [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] [INFO] [stdout] ---- exercises::tests::test_swap_two_ints stdout ---- [INFO] [stdout] thread 'exercises::tests::test_swap_two_ints' panicked at 'not implemented', src/exercises.rs:5:5 [INFO] [stdout] stack backtrace: [INFO] [stdout] 0: 0x555a8b4437fc - std::backtrace_rs::backtrace::libunwind::trace::h02555d7ca8aa068a [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5 [INFO] [stdout] 1: 0x555a8b4437fc - std::backtrace_rs::backtrace::trace_unsynchronized::h8555a46024147da8 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 [INFO] [stdout] 2: 0x555a8b4437fc - std::sys_common::backtrace::_print_fmt::h4c7f50b4f105da1e [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/sys_common/backtrace.rs:66:5 [INFO] [stdout] 3: 0x555a8b4437fc - ::fmt::ha305a40dbc030444 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/sys_common/backtrace.rs:45:22 [INFO] [stdout] 4: 0x555a8b468b3c - core::fmt::write::hadd15acf4d6ce273 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/core/src/fmt/mod.rs:1190:17 [INFO] [stdout] 5: 0x555a8b43f0f8 - std::io::Write::write_fmt::h271050faa79d27d2 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/io/mod.rs:1657:15 [INFO] [stdout] 6: 0x555a8b445ac7 - std::sys_common::backtrace::_print::h0dd5c0810675bd8c [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/sys_common/backtrace.rs:48:5 [INFO] [stdout] 7: 0x555a8b445ac7 - std::sys_common::backtrace::print::h20a2155fa0a22ca6 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/sys_common/backtrace.rs:35:9 [INFO] [stdout] 8: 0x555a8b445ac7 - std::panicking::default_hook::{{closure}}::habb3b6f3ccdfe00a [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/panicking.rs:295:22 [INFO] [stdout] 9: 0x555a8b4457fb - std::panicking::default_hook::h1c5cf4d5063a38e4 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/panicking.rs:311:9 [INFO] [stdout] 10: 0x555a8b44621a - std::panicking::rust_panic_with_hook::hb5de7a3072d2cf59 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/panicking.rs:698:17 [INFO] [stdout] 11: 0x555a8b445ec9 - std::panicking::begin_panic_handler::{{closure}}::h5106de2f55f1a411 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/panicking.rs:586:13 [INFO] [stdout] 12: 0x555a8b443cc4 - std::sys_common::backtrace::__rust_end_short_backtrace::h5ad5c2a8a003ca72 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/sys_common/backtrace.rs:138:18 [INFO] [stdout] 13: 0x555a8b445c19 - rust_begin_unwind [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/panicking.rs:584:5 [INFO] [stdout] 14: 0x555a8b3ed123 - core::panicking::panic_fmt::hfb4b8460cd493e74 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/core/src/panicking.rs:143:14 [INFO] [stdout] 15: 0x555a8b3ecfed - core::panicking::panic::h33838847634b5d2d [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/core/src/panicking.rs:48:5 [INFO] [stdout] 16: 0x555a8b3edeca - rust_workshop_0::exercises::swap_two_ints::hf2877dca1e1c2898 [INFO] [stdout] at /opt/rustwide/workdir/src/exercises.rs:5:2 [INFO] [stdout] 17: 0x555a8b3edf76 - rust_workshop_0::exercises::tests::test_swap_two_ints::h8307e2d661a7ca32 [INFO] [stdout] at /opt/rustwide/workdir/src/exercises.rs:68:3 [INFO] [stdout] 18: 0x555a8b3edf3a - rust_workshop_0::exercises::tests::test_swap_two_ints::{{closure}}::h4ba228652331a2fa [INFO] [stdout] at /opt/rustwide/workdir/src/exercises.rs:65:2 [INFO] [stdout] 19: 0x555a8b3edd3e - core::ops::function::FnOnce::call_once::hcbd83e35ecf5dda5 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/core/src/ops/function.rs:227:5 [INFO] [stdout] 20: 0x555a8b419823 - core::ops::function::FnOnce::call_once::h43953c8a8f54893f [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/core/src/ops/function.rs:227:5 [INFO] [stdout] 21: 0x555a8b419823 - test::__rust_begin_short_backtrace::h163f55298a15df9b [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/test/src/lib.rs:575:5 [INFO] [stdout] 22: 0x555a8b418551 - as core::ops::function::FnOnce>::call_once::hc911782b3cbc7ed5 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/alloc/src/boxed.rs:1854:9 [INFO] [stdout] 23: 0x555a8b418551 - as core::ops::function::FnOnce<()>>::call_once::hc5bb369afbf9cd4e [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/core/src/panic/unwind_safe.rs:271:9 [INFO] [stdout] 24: 0x555a8b418551 - std::panicking::try::do_call::he60df4e3e832faff [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/panicking.rs:492:40 [INFO] [stdout] 25: 0x555a8b418551 - std::panicking::try::h2633cee89a0767f3 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/panicking.rs:456:19 [INFO] [stdout] 26: 0x555a8b418551 - std::panic::catch_unwind::h6e10f7b94ce38b1e [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/panic.rs:137:14 [INFO] [stdout] 27: 0x555a8b418551 - test::run_test_in_process::h085ef39049c3b50b [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/test/src/lib.rs:598:18 [INFO] [stdout] 28: 0x555a8b418551 - test::run_test::run_test_inner::{{closure}}::h4e58ce9f68eb43e4 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/test/src/lib.rs:492:39 [INFO] [stdout] 29: 0x555a8b421e31 - test::run_test::run_test_inner::{{closure}}::h6d18db28c5e396ee [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/test/src/lib.rs:519:37 [INFO] [stdout] 30: 0x555a8b421e31 - std::sys_common::backtrace::__rust_begin_short_backtrace::h32292cb2cd8be620 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/sys_common/backtrace.rs:122:18 [INFO] [stdout] 31: 0x555a8b3ee58f - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h71ee66b20f7b0482 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/thread/mod.rs:498:17 [INFO] [stdout] 32: 0x555a8b3ee58f - as core::ops::function::FnOnce<()>>::call_once::hb6046e1d1a75a4a4 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/core/src/panic/unwind_safe.rs:271:9 [INFO] [stdout] 33: 0x555a8b3ee58f - std::panicking::try::do_call::h5422165a88309c77 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/panicking.rs:492:40 [INFO] [stdout] 34: 0x555a8b3ee58f - std::panicking::try::h840a12b54e2c9f5d [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/panicking.rs:456:19 [INFO] [stdout] 35: 0x555a8b3ee58f - std::panic::catch_unwind::h85910e437c8da180 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/panic.rs:137:14 [INFO] [stdout] 36: 0x555a8b3ee58f - std::thread::Builder::spawn_unchecked_::{{closure}}::ha3af3a297bfd51d6 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/thread/mod.rs:497:30 [INFO] [stdout] 37: 0x555a8b3ee58f - core::ops::function::FnOnce::call_once{{vtable.shim}}::hff8788f58e0e06a9 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/core/src/ops/function.rs:227:5 [INFO] [stdout] 38: 0x555a8b44beb3 - as core::ops::function::FnOnce>::call_once::h82a18723295373b7 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/alloc/src/boxed.rs:1854:9 [INFO] [stdout] 39: 0x555a8b44beb3 - as core::ops::function::FnOnce>::call_once::h4b9b8634f7a2a5a4 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/alloc/src/boxed.rs:1854:9 [INFO] [stdout] 40: 0x555a8b44beb3 - std::sys::unix::thread::Thread::new::thread_start::h3dc341aa024c6852 [INFO] [stdout] at /rustc/0a4f984a87c7ba6c74ec3e78442fec955a419e32/library/std/src/sys/unix/thread.rs:108:17 [INFO] [stdout] 41: 0x7f6d64196609 - start_thread [INFO] [stdout] 42: 0x7f6d63f68293 - clone [INFO] [stdout] 43: 0x0 - [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] exercises::tests::test_swap_two_ints [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 rust-workshop-0' [INFO] running `Command { std: "docker" "inspect" "d1e8f89bedcae1e35dffb21f3b3e904392c2b3f7357ea07dcbc9248d8714edc0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d1e8f89bedcae1e35dffb21f3b3e904392c2b3f7357ea07dcbc9248d8714edc0", kill_on_drop: false }` [INFO] [stdout] d1e8f89bedcae1e35dffb21f3b3e904392c2b3f7357ea07dcbc9248d8714edc0