[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-2022-04-10 for beta-1.61-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCMU-Blockchain-Group%2Frust-workshop-0" "/workspace/builds/worker-25/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-25/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/CMU-Blockchain-Group/rust-workshop-0 on toolchain beta-2022-04-10 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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-25/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-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] f7090e7951dde835936249143c09fbff6e42e95c9c52f5aa73c3efa2167b55fa [INFO] running `Command { std: "docker" "start" "-a" "f7090e7951dde835936249143c09fbff6e42e95c9c52f5aa73c3efa2167b55fa", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f7090e7951dde835936249143c09fbff6e42e95c9c52f5aa73c3efa2167b55fa", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f7090e7951dde835936249143c09fbff6e42e95c9c52f5aa73c3efa2167b55fa", kill_on_drop: false }` [INFO] [stdout] f7090e7951dde835936249143c09fbff6e42e95c9c52f5aa73c3efa2167b55fa [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] b7702be7eaf16d47bba593dbc6eb3a932193f2ab59333322c13da705b2c2816c [INFO] running `Command { std: "docker" "start" "-a" "b7702be7eaf16d47bba593dbc6eb3a932193f2ab59333322c13da705b2c2816c", 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: 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] [stdout] warning: 21 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.80s [INFO] running `Command { std: "docker" "inspect" "b7702be7eaf16d47bba593dbc6eb3a932193f2ab59333322c13da705b2c2816c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b7702be7eaf16d47bba593dbc6eb3a932193f2ab59333322c13da705b2c2816c", kill_on_drop: false }` [INFO] [stdout] b7702be7eaf16d47bba593dbc6eb3a932193f2ab59333322c13da705b2c2816c [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] bf07d30a8d73001ee45a47fe474171e9e950e225971faad5e67d1b26192ef368 [INFO] running `Command { std: "docker" "start" "-a" "bf07d30a8d73001ee45a47fe474171e9e950e225971faad5e67d1b26192ef368", 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 0.27s [INFO] [stderr] Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_workshop_0-4806e5dea088fc25) [INFO] running `Command { std: "docker" "inspect" "bf07d30a8d73001ee45a47fe474171e9e950e225971faad5e67d1b26192ef368", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "bf07d30a8d73001ee45a47fe474171e9e950e225971faad5e67d1b26192ef368", kill_on_drop: false }` [INFO] [stdout] bf07d30a8d73001ee45a47fe474171e9e950e225971faad5e67d1b26192ef368 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 53ba3a247e3b4d6792a719d133038eb854044af595dd01685efc3a12398fa7a0 [INFO] running `Command { std: "docker" "start" "-a" "53ba3a247e3b4d6792a719d133038eb854044af595dd01685efc3a12398fa7a0", kill_on_drop: false }` [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 0.00s [INFO] [stderr] Running unittests src/main.rs (/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: 0x55818447a47d - std::backtrace_rs::backtrace::libunwind::trace::ha359b7f0090e2792 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5 [INFO] [stdout] 1: 0x55818447a47d - std::backtrace_rs::backtrace::trace_unsynchronized::h0584631f25c1d70e [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 [INFO] [stdout] 2: 0x55818447a47d - std::sys_common::backtrace::_print_fmt::hdadffd97d279ff14 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/sys_common/backtrace.rs:66:5 [INFO] [stdout] 3: 0x55818447a47d - ::fmt::h26f189e611080a74 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/sys_common/backtrace.rs:45:22 [INFO] [stdout] 4: 0x55818449cd8c - core::fmt::write::hfb5d11dfe037e8b7 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/fmt/mod.rs:1194:17 [INFO] [stdout] 5: 0x558184476e41 - std::io::Write::write_fmt::h6a24ec64406df9e2 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/io/mod.rs:1655:15 [INFO] [stdout] 6: 0x55818447c1c5 - std::sys_common::backtrace::_print::h7a0e44402913ba60 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/sys_common/backtrace.rs:48:5 [INFO] [stdout] 7: 0x55818447c1c5 - std::sys_common::backtrace::print::h9767dc455a84e728 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/sys_common/backtrace.rs:35:9 [INFO] [stdout] 8: 0x55818447c1c5 - std::panicking::default_hook::{{closure}}::h60afd6c8b12988ad [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:295:22 [INFO] [stdout] 9: 0x55818447beb4 - std::panicking::default_hook::ha7b9bac6813f9d21 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:311:9 [INFO] [stdout] 10: 0x55818447c712 - std::panicking::rust_panic_with_hook::h7b117a162a6f8664 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:698:17 [INFO] [stdout] 11: 0x55818447c5b9 - std::panicking::begin_panic_handler::{{closure}}::h346750923c608600 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:586:13 [INFO] [stdout] 12: 0x55818447a934 - std::sys_common::backtrace::__rust_end_short_backtrace::h768c56c6a0c055c0 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/sys_common/backtrace.rs:138:18 [INFO] [stdout] 13: 0x55818447c329 - rust_begin_unwind [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:584:5 [INFO] [stdout] 14: 0x5581844203d3 - core::panicking::panic_fmt::h5c41cb2fa118fdbc [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/panicking.rs:143:14 [INFO] [stdout] 15: 0x55818442029d - core::panicking::panic::h19a70c01bbabd538 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/panicking.rs:48:5 [INFO] [stdout] 16: 0x5581844209ba - rust_workshop_0::exercises::swap_two_ints::h835e77cee910294f [INFO] [stdout] at /opt/rustwide/workdir/src/exercises.rs:5:2 [INFO] [stdout] 17: 0x558184420d56 - rust_workshop_0::exercises::tests::test_swap_two_ints::h89aaf73937599df0 [INFO] [stdout] at /opt/rustwide/workdir/src/exercises.rs:68:3 [INFO] [stdout] 18: 0x558184420d1a - rust_workshop_0::exercises::tests::test_swap_two_ints::{{closure}}::h84272792967d0567 [INFO] [stdout] at /opt/rustwide/workdir/src/exercises.rs:65:2 [INFO] [stdout] 19: 0x5581844207de - core::ops::function::FnOnce::call_once::hba13ef179a61921f [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/ops/function.rs:227:5 [INFO] [stdout] 20: 0x5581844561e3 - core::ops::function::FnOnce::call_once::h018fc248431ce8de [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/ops/function.rs:227:5 [INFO] [stdout] 21: 0x5581844561e3 - test::__rust_begin_short_backtrace::h293b982b6069d6e3 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/test/src/lib.rs:574:5 [INFO] [stdout] 22: 0x558184454f99 - as core::ops::function::FnOnce>::call_once::h4fc1be1a762c7a46 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/alloc/src/boxed.rs:1861:9 [INFO] [stdout] 23: 0x558184454f99 - as core::ops::function::FnOnce<()>>::call_once::hd44623ec51b9e897 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/panic/unwind_safe.rs:271:9 [INFO] [stdout] 24: 0x558184454f99 - std::panicking::try::do_call::ha8cfa4b025f5b832 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:492:40 [INFO] [stdout] 25: 0x558184454f99 - std::panicking::try::h664f75e41c112145 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:456:19 [INFO] [stdout] 26: 0x558184454f99 - std::panic::catch_unwind::h4932ec05cd60558e [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panic.rs:137:14 [INFO] [stdout] 27: 0x558184454f99 - test::run_test_in_process::ha14a47756671755c [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/test/src/lib.rs:597:18 [INFO] [stdout] 28: 0x558184454f99 - test::run_test::run_test_inner::{{closure}}::h0ec9e37c8f67b62d [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/test/src/lib.rs:491:39 [INFO] [stdout] 29: 0x55818442114e - test::run_test::run_test_inner::{{closure}}::hd9d2e7f26d4f59e6 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/test/src/lib.rs:518:37 [INFO] [stdout] 30: 0x55818442114e - std::sys_common::backtrace::__rust_begin_short_backtrace::h41c0a39fac5123f8 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/sys_common/backtrace.rs:122:18 [INFO] [stdout] 31: 0x5581844266b8 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h69a02ca0bebb6eeb [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/thread/mod.rs:498:17 [INFO] [stdout] 32: 0x5581844266b8 - as core::ops::function::FnOnce<()>>::call_once::hdd05632920ce689b [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/panic/unwind_safe.rs:271:9 [INFO] [stdout] 33: 0x5581844266b8 - std::panicking::try::do_call::hb4947142729b90fd [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:492:40 [INFO] [stdout] 34: 0x5581844266b8 - std::panicking::try::h15a7e9b8394e6878 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panicking.rs:456:19 [INFO] [stdout] 35: 0x5581844266b8 - std::panic::catch_unwind::hbd3f4a3f9df49b85 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/panic.rs:137:14 [INFO] [stdout] 36: 0x5581844266b8 - std::thread::Builder::spawn_unchecked_::{{closure}}::h880b5d5f1b9799f4 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/thread/mod.rs:497:30 [INFO] [stdout] 37: 0x5581844266b8 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h304d5eaf401f5061 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/core/src/ops/function.rs:227:5 [INFO] [stdout] 38: 0x558184480f23 - as core::ops::function::FnOnce>::call_once::hdba7f2afed0c35b3 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/alloc/src/boxed.rs:1861:9 [INFO] [stdout] 39: 0x558184480f23 - as core::ops::function::FnOnce>::call_once::h38b0832765bf7961 [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/alloc/src/boxed.rs:1861:9 [INFO] [stdout] 40: 0x558184480f23 - std::sys::unix::thread::Thread::new::thread_start::h70236dc17753425e [INFO] [stdout] at /rustc/7c13df853721b60a03e7c0bb084d2eb1e27a9caa/library/std/src/sys/unix/thread.rs:108:17 [INFO] [stdout] 41: 0x7fce2f23c609 - start_thread [INFO] [stdout] 42: 0x7fce2f00c163 - 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 0.01s [INFO] [stdout] [INFO] [stderr] error: test failed, to rerun pass '--bin rust-workshop-0' [INFO] running `Command { std: "docker" "inspect" "53ba3a247e3b4d6792a719d133038eb854044af595dd01685efc3a12398fa7a0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "53ba3a247e3b4d6792a719d133038eb854044af595dd01685efc3a12398fa7a0", kill_on_drop: false }` [INFO] [stdout] 53ba3a247e3b4d6792a719d133038eb854044af595dd01685efc3a12398fa7a0