[INFO] cloning repository https://github.com/LironHazan/rusty-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LironHazan/rusty-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLironHazan%2Frusty-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLironHazan%2Frusty-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d1ad54bf14f4bde13310a62f95c905848405f864
[INFO] checking LironHazan/rusty-playground against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLironHazan%2Frusty-playground" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/LironHazan/rusty-playground
[INFO] finished tweaking git repo https://github.com/LironHazan/rusty-playground
[INFO] tweaked toml for git repo https://github.com/LironHazan/rusty-playground written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/LironHazan/rusty-playground on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/LironHazan/rusty-playground 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 377b3cb6d3de0c9c1661de7a83692053be142a915800ad69d75136d1397d3b7c
[INFO] running `Command { std: "docker" "start" "-a" "377b3cb6d3de0c9c1661de7a83692053be142a915800ad69d75136d1397d3b7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "377b3cb6d3de0c9c1661de7a83692053be142a915800ad69d75136d1397d3b7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "377b3cb6d3de0c9c1661de7a83692053be142a915800ad69d75136d1397d3b7c", kill_on_drop: false }`
[INFO] [stdout] 377b3cb6d3de0c9c1661de7a83692053be142a915800ad69d75136d1397d3b7c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 36e922f772d23e506b5b6ef6b95055eb48faba69081ebedd8097538879814216
[INFO] running `Command { std: "docker" "start" "-a" "36e922f772d23e506b5b6ef6b95055eb48faba69081ebedd8097538879814216", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking rusty-playgraound v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `lang_stuff::borrows::borrows::imperative_sum`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use lang_stuff::borrows::borrows::imperative_sum;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_ownwership_sum` is never used
[INFO] [stdout]  --> src/lang_stuff/borrows.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 |     fn take_ownwership_sum(v: Vec<i32>) -> i32 {
[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 `borrow_sum` is never used
[INFO] [stdout]   --> src/lang_stuff/borrows.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn borrow_sum(v: &Vec<i32>) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `imperative_sum` is never used
[INFO] [stdout]   --> src/lang_stuff/borrows.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn imperative_sum() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `NoisyAnimal` is never used
[INFO] [stdout]  --> src/lang_stuff/trait_obj.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait NoisyAnimal {
[INFO] [stdout]   |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cat` is never constructed
[INFO] [stdout]  --> src/lang_stuff/trait_obj.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Cat{}
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Dog` is never constructed
[INFO] [stdout]   --> src/lang_stuff/trait_obj.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Dog{}
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `make_noises` is never used
[INFO] [stdout]   --> src/lang_stuff/trait_obj.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn make_noises(animals: Vec<Box<dyn NoisyAnimal>>) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `make_noises_with_constraints` is never used
[INFO] [stdout]   --> src/lang_stuff/trait_obj.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn make_noises_with_constraints<T: NoisyAnimal>(animal: T) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `call_make_noises` is never used
[INFO] [stdout]   --> src/lang_stuff/trait_obj.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn call_make_noises() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rusty-playgraound` (bin "rusty-playgraound") due to 1 previous error; 10 warnings emitted
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/lang_stuff/io_parse.rs:10:19
[INFO] [stdout]    |
[INFO] [stdout] 10 |             match name.trim().parse::<String>() {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused import: `lang_stuff::borrows::borrows::imperative_sum`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use lang_stuff::borrows::borrows::imperative_sum;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_ownwership_sum` is never used
[INFO] [stdout]  --> src/lang_stuff/borrows.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 |     fn take_ownwership_sum(v: Vec<i32>) -> i32 {
[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 `borrow_sum` is never used
[INFO] [stdout]   --> src/lang_stuff/borrows.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn borrow_sum(v: &Vec<i32>) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `imperative_sum` is never used
[INFO] [stdout]   --> src/lang_stuff/borrows.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn imperative_sum() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `NoisyAnimal` is never used
[INFO] [stdout]  --> src/lang_stuff/trait_obj.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait NoisyAnimal {
[INFO] [stdout]   |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cat` is never constructed
[INFO] [stdout]  --> src/lang_stuff/trait_obj.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Cat{}
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Dog` is never constructed
[INFO] [stdout]   --> src/lang_stuff/trait_obj.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Dog{}
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `make_noises` is never used
[INFO] [stdout]   --> src/lang_stuff/trait_obj.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn make_noises(animals: Vec<Box<dyn NoisyAnimal>>) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `make_noises_with_constraints` is never used
[INFO] [stdout]   --> src/lang_stuff/trait_obj.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn make_noises_with_constraints<T: NoisyAnimal>(animal: T) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `call_make_noises` is never used
[INFO] [stdout]   --> src/lang_stuff/trait_obj.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn call_make_noises() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/lang_stuff/io_parse.rs:10:19
[INFO] [stdout]    |
[INFO] [stdout] 10 |             match name.trim().parse::<String>() {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rusty-playgraound` (bin "rusty-playgraound" test) due to 1 previous error; 10 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "36e922f772d23e506b5b6ef6b95055eb48faba69081ebedd8097538879814216", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36e922f772d23e506b5b6ef6b95055eb48faba69081ebedd8097538879814216", kill_on_drop: false }`
[INFO] [stdout] 36e922f772d23e506b5b6ef6b95055eb48faba69081ebedd8097538879814216
