[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 try#db823df02fd0c2cf67b43025ac3fef3f2d743245 for pr-150681
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCMU-Blockchain-Group%2Frust-workshop-0" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[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-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/CMU-Blockchain-Group/rust-workshop-0 on toolchain db823df02fd0c2cf67b43025ac3fef3f2d743245
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fad6eb62cd3e079d9255fb00dc4c89239342224ad7f0ac954cfb705fdde166ff
[INFO] running `Command { std: "docker" "start" "-a" "fad6eb62cd3e079d9255fb00dc4c89239342224ad7f0ac954cfb705fdde166ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fad6eb62cd3e079d9255fb00dc4c89239342224ad7f0ac954cfb705fdde166ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fad6eb62cd3e079d9255fb00dc4c89239342224ad7f0ac954cfb705fdde166ff", kill_on_drop: false }`
[INFO] [stdout] fad6eb62cd3e079d9255fb00dc4c89239342224ad7f0ac954cfb705fdde166ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5ae1187efa9f68dbfdefaa46f6dd6179fab3bf5a5f2ec7b7ca692beba73625f7
[INFO] running `Command { std: "docker" "start" "-a" "5ae1187efa9f68dbfdefaa46f6dd6179fab3bf5a5f2ec7b7ca692beba73625f7", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-workshop-0 v0.1.0 (/opt/rustwide/workdir)
[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]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[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<u32> {
[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<usize> {
[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: 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] 
[INFO] [stdout] warning: constant `DIFFICULTY` is never used
[INFO] [stdout]  --> src/main.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | const DIFFICULTY: usize = 4;
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `swap_two_ints` is never used
[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 `Rectangle` is never constructed
[INFO] [stdout]  --> src/exercises.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Rectangle {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rect_overlaps` is never used
[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 `RockPaperScissors` is never used
[INFO] [stdout]   --> src/exercises.rs:19:6
[INFO] [stdout]    |
[INFO] [stdout] 19 | enum RockPaperScissors {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rps_weakness` is never used
[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 `dot_product` is never used
[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 `first_n_fib` is never used
[INFO] [stdout]   --> src/exercises.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn first_n_fib(n: usize) -> Vec<u32> {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recursive_binary_search` is never used
[INFO] [stdout]   --> src/exercises.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn recursive_binary_search(a: &[i32]) -> Option<usize> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `flatten_slice_of_slices` is never used
[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` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "5ae1187efa9f68dbfdefaa46f6dd6179fab3bf5a5f2ec7b7ca692beba73625f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ae1187efa9f68dbfdefaa46f6dd6179fab3bf5a5f2ec7b7ca692beba73625f7", kill_on_drop: false }`
[INFO] [stdout] 5ae1187efa9f68dbfdefaa46f6dd6179fab3bf5a5f2ec7b7ca692beba73625f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0c601694dc5d7fb72fa2839793bf74d80df70a04e01100a57a04ae75d66178d
[INFO] running `Command { std: "docker" "start" "-a" "e0c601694dc5d7fb72fa2839793bf74d80df70a04e01100a57a04ae75d66178d", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-workshop-0 v0.1.0 (/opt/rustwide/workdir)
[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]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[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<u32> {
[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<usize> {
[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: 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] 
[INFO] [stdout] warning: constant `DIFFICULTY` is never used
[INFO] [stdout]  --> src/main.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | const DIFFICULTY: usize = 4;
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]  --> src/exercises.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Rectangle {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rect_overlaps` is never used
[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 `RockPaperScissors` is never used
[INFO] [stdout]   --> src/exercises.rs:19:6
[INFO] [stdout]    |
[INFO] [stdout] 19 | enum RockPaperScissors {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rps_weakness` is never used
[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 `dot_product` is never used
[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 `first_n_fib` is never used
[INFO] [stdout]   --> src/exercises.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn first_n_fib(n: usize) -> Vec<u32> {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recursive_binary_search` is never used
[INFO] [stdout]   --> src/exercises.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn recursive_binary_search(a: &[i32]) -> Option<usize> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `flatten_slice_of_slices` is never used
[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 `test` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "e0c601694dc5d7fb72fa2839793bf74d80df70a04e01100a57a04ae75d66178d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0c601694dc5d7fb72fa2839793bf74d80df70a04e01100a57a04ae75d66178d", kill_on_drop: false }`
[INFO] [stdout] e0c601694dc5d7fb72fa2839793bf74d80df70a04e01100a57a04ae75d66178d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8f79a0a4a08b9ae642567eda19a9c62a7bb4ad2eeb7a29fb57dca3c7cf09a08e
[INFO] running `Command { std: "docker" "start" "-a" "8f79a0a4a08b9ae642567eda19a9c62a7bb4ad2eeb7a29fb57dca3c7cf09a08e", kill_on_drop: false }`
[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]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[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<u32> {
[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<usize> {
[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: 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] warning: constant `DIFFICULTY` is never used
[INFO] [stderr]  --> src/main.rs:4:7
[INFO] [stderr]   |
[INFO] [stderr] 4 | const DIFFICULTY: usize = 4;
[INFO] [stderr]   |       ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Rectangle` is never constructed
[INFO] [stderr]  --> src/exercises.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | struct Rectangle {
[INFO] [stderr]   |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `rect_overlaps` is never used
[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 `RockPaperScissors` is never used
[INFO] [stderr]   --> src/exercises.rs:19:6
[INFO] [stderr]    |
[INFO] [stderr] 19 | enum RockPaperScissors {
[INFO] [stderr]    |      ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `rps_weakness` is never used
[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 `dot_product` is never used
[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 `first_n_fib` is never used
[INFO] [stderr]   --> src/exercises.rs:40:4
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn first_n_fib(n: usize) -> Vec<u32> {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `recursive_binary_search` is never used
[INFO] [stderr]   --> src/exercises.rs:48:4
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn recursive_binary_search(a: &[i32]) -> Option<usize> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `flatten_slice_of_slices` is never used
[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 (run `cargo fix --bin "rust-workshop-0" -p rust-workshop-0 --tests` to apply 11 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_workshop_0-08c291ea81b4f17c)
[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] 
[INFO] [stdout] thread 'exercises::tests::test_swap_two_ints' (17) panicked at src/exercises.rs:5:5:
[INFO] [stdout] not implemented
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x63f8dcc7bdd2 - std[3f03f8b59f91bef1]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x63f8dcc7bdd2 - std[3f03f8b59f91bef1]::backtrace_rs::backtrace::trace_unsynchronized::<std[3f03f8b59f91bef1]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x63f8dcc7bdd2 - std[3f03f8b59f91bef1]::sys::backtrace::_print_fmt
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x63f8dcc7bdd2 - <<std[3f03f8b59f91bef1]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[585f66e14d78f9ba]::fmt::Display>::fmt
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x63f8dcc905da - <core[585f66e14d78f9ba]::fmt::rt::Argument>::fmt
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x63f8dcc905da - core[585f66e14d78f9ba]::fmt::write
[INFO] [stdout]    6:     0x63f8dcc80bd6 - std[3f03f8b59f91bef1]::io::default_write_fmt::<alloc[15e7b27aba85d2e2]::vec::Vec<u8>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x63f8dcc80bd6 - <alloc[15e7b27aba85d2e2]::vec::Vec<u8> as std[3f03f8b59f91bef1]::io::Write>::write_fmt
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/io/mod.rs:1994:13
[INFO] [stdout]    8:     0x63f8dcc5a56f - <std[3f03f8b59f91bef1]::sys::backtrace::BacktraceLock>::print
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x63f8dcc5a56f - std[3f03f8b59f91bef1]::panicking::default_hook::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x63f8dcc74109 - std[3f03f8b59f91bef1]::panicking::default_hook
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x63f8dcc0fb3e - <alloc[15e7b27aba85d2e2]::boxed::Box<dyn for<'a, 'b> core[585f66e14d78f9ba]::ops::function::Fn<(&'a std[3f03f8b59f91bef1]::panic::PanicHookInfo<'b>,), Output = ()> + core[585f66e14d78f9ba]::marker::Sync + core[585f66e14d78f9ba]::marker::Send> as core[585f66e14d78f9ba]::ops::function::Fn<(&std[3f03f8b59f91bef1]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   12:     0x63f8dcc0fb3e - test[30224e0cb089acd2]::test_main_with_exit_callback::<test[30224e0cb089acd2]::test_main::{closure#0}>::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x63f8dcc742c2 - <alloc[15e7b27aba85d2e2]::boxed::Box<dyn for<'a, 'b> core[585f66e14d78f9ba]::ops::function::Fn<(&'a std[3f03f8b59f91bef1]::panic::PanicHookInfo<'b>,), Output = ()> + core[585f66e14d78f9ba]::marker::Sync + core[585f66e14d78f9ba]::marker::Send> as core[585f66e14d78f9ba]::ops::function::Fn<(&std[3f03f8b59f91bef1]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   14:     0x63f8dcc742c2 - std[3f03f8b59f91bef1]::panicking::panic_with_hook
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x63f8dcc5a65a - std[3f03f8b59f91bef1]::panicking::panic_handler::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:691:13
[INFO] [stdout]   16:     0x63f8dcc4f819 - std[3f03f8b59f91bef1]::sys::backtrace::__rust_end_short_backtrace::<std[3f03f8b59f91bef1]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x63f8dcc5b47d - __rustc[caa99d26c7bae192]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x63f8dcc90c4c - core[585f66e14d78f9ba]::panicking::panic_fmt
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x63f8dcc90c12 - core[585f66e14d78f9ba]::panicking::panic
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/panicking.rs:150:5
[INFO] [stdout]   20:     0x63f8dcc03887 - rust_workshop_0[4bf85706395f043c]::exercises::swap_two_ints
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercises.rs:5:2
[INFO] [stdout]   21:     0x63f8dcc038b0 - rust_workshop_0[4bf85706395f043c]::exercises::tests::test_swap_two_ints
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercises.rs:68:3
[INFO] [stdout]   22:     0x63f8dcc03547 - rust_workshop_0[4bf85706395f043c]::exercises::tests::test_swap_two_ints::{closure#0}
[INFO] [stdout]                                at /opt/rustwide/workdir/src/exercises.rs:65:25
[INFO] [stdout]   23:     0x63f8dcc03e16 - <rust_workshop_0[4bf85706395f043c]::exercises::tests::test_swap_two_ints::{closure#0} as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x63f8dcc03eeb - <fn() -> core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String> as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x63f8dcc03eeb - test[30224e0cb089acd2]::__rust_begin_short_backtrace::<core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String>, fn() -> core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:663:18
[INFO] [stdout]   26:     0x63f8dcc1074a - test[30224e0cb089acd2]::run_test_in_process::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:686:74
[INFO] [stdout]   27:     0x63f8dcc1074a - <core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<test[30224e0cb089acd2]::run_test_in_process::{closure#0}> as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   28:     0x63f8dcc1074a - std[3f03f8b59f91bef1]::panicking::catch_unwind::do_call::<core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<test[30224e0cb089acd2]::run_test_in_process::{closure#0}>, core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:581:40
[INFO] [stdout]   29:     0x63f8dcc1074a - std[3f03f8b59f91bef1]::panicking::catch_unwind::<core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String>, core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<test[30224e0cb089acd2]::run_test_in_process::{closure#0}>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:544:19
[INFO] [stdout]   30:     0x63f8dcc1074a - std[3f03f8b59f91bef1]::panic::catch_unwind::<core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<test[30224e0cb089acd2]::run_test_in_process::{closure#0}>, core[585f66e14d78f9ba]::result::Result<(), alloc[15e7b27aba85d2e2]::string::String>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x63f8dcc1074a - test[30224e0cb089acd2]::run_test_in_process
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:686:27
[INFO] [stdout]   32:     0x63f8dcc1074a - test[30224e0cb089acd2]::run_test::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:607:43
[INFO] [stdout]   33:     0x63f8dcc0ac14 - test[30224e0cb089acd2]::run_test::{closure#1}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/test/src/lib.rs:637:41
[INFO] [stdout]   34:     0x63f8dcc0ac14 - std[3f03f8b59f91bef1]::sys::backtrace::__rust_begin_short_backtrace::<test[30224e0cb089acd2]::run_test::{closure#1}, ()>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   35:     0x63f8dcc13242 - std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked::<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/thread/lifecycle.rs:91:13
[INFO] [stdout]   36:     0x63f8dcc13242 - <core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}> as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   37:     0x63f8dcc13242 - std[3f03f8b59f91bef1]::panicking::catch_unwind::do_call::<core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:581:40
[INFO] [stdout]   38:     0x63f8dcc13242 - std[3f03f8b59f91bef1]::panicking::catch_unwind::<(), core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:544:19
[INFO] [stdout]   39:     0x63f8dcc13242 - std[3f03f8b59f91bef1]::panic::catch_unwind::<core[585f66e14d78f9ba]::panic::unwind_safe::AssertUnwindSafe<std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x63f8dcc13242 - std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked::<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/thread/lifecycle.rs:89:26
[INFO] [stdout]   41:     0x63f8dcc13242 - <std[3f03f8b59f91bef1]::thread::lifecycle::spawn_unchecked<test[30224e0cb089acd2]::run_test::{closure#1}, ()>::{closure#1} as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x63f8dcc7b67f - <alloc[15e7b27aba85d2e2]::boxed::Box<dyn core[585f66e14d78f9ba]::ops::function::FnOnce<(), Output = ()> + core[585f66e14d78f9ba]::marker::Send> as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/alloc/src/boxed.rs:2206:9
[INFO] [stdout]   43:     0x63f8dcc7b67f - <std[3f03f8b59f91bef1]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]                                at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/thread/unix.rs:119:17
[INFO] [stdout]   44:     0x79c238085aa4 - <unknown>
[INFO] [stdout]   45:     0x79c238112a64 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[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" "8f79a0a4a08b9ae642567eda19a9c62a7bb4ad2eeb7a29fb57dca3c7cf09a08e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f79a0a4a08b9ae642567eda19a9c62a7bb4ad2eeb7a29fb57dca3c7cf09a08e", kill_on_drop: false }`
[INFO] [stdout] 8f79a0a4a08b9ae642567eda19a9c62a7bb4ad2eeb7a29fb57dca3c7cf09a08e
