[INFO] cloning repository https://github.com/trngdothuy/rust-exercises
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/trngdothuy/rust-exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrngdothuy%2Frust-exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrngdothuy%2Frust-exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 89f6787ea4d3fb073d50af81e3a00e794f70b2a2
[INFO] checking trngdothuy/rust-exercises against master#1fe72d35998dea48aeecaf7fc07783b0b553f24f for pr-154992-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrngdothuy%2Frust-exercises" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/trngdothuy/rust-exercises
[INFO] finished tweaking git repo https://github.com/trngdothuy/rust-exercises
[INFO] tweaked toml for git repo https://github.com/trngdothuy/rust-exercises written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/trngdothuy/rust-exercises on toolchain 1fe72d35998dea48aeecaf7fc07783b0b553f24f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1fe72d35998dea48aeecaf7fc07783b0b553f24f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/trngdothuy/rust-exercises 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" "+1fe72d35998dea48aeecaf7fc07783b0b553f24f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro2 v1.0.43
[INFO] [stderr]   Downloaded unicode-ident v1.0.3
[INFO] [stderr]   Downloaded unicode-width v0.1.9
[INFO] [stderr]   Downloaded thiserror v1.0.34
[INFO] [stderr]   Downloaded iana-time-zone v0.1.47
[INFO] [stderr]   Downloaded once_cell v1.14.0
[INFO] [stderr]   Downloaded js-sys v0.3.59
[INFO] [stderr]   Downloaded chrono v0.4.22
[INFO] [stderr]   Downloaded bumpalo v3.11.0
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.82
[INFO] [stderr]   Downloaded time v0.1.44
[INFO] [stderr]   Downloaded libc v0.2.132
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.82
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.82
[INFO] [stderr]   Downloaded core-foundation-sys v0.8.3
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[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.82
[INFO] [stderr]   Downloaded syn v1.0.99
[INFO] [stderr]   Downloaded thiserror-impl v1.0.34
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.82
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1fe72d35998dea48aeecaf7fc07783b0b553f24f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ec0fb637ecbd243b04e3444c03a267b65a0ca6f7d909ac3a6581fbd729065717
[INFO] running `Command { std: "docker" "start" "-a" "ec0fb637ecbd243b04e3444c03a267b65a0ca6f7d909ac3a6581fbd729065717", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ec0fb637ecbd243b04e3444c03a267b65a0ca6f7d909ac3a6581fbd729065717", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec0fb637ecbd243b04e3444c03a267b65a0ca6f7d909ac3a6581fbd729065717", kill_on_drop: false }`
[INFO] [stdout] ec0fb637ecbd243b04e3444c03a267b65a0ca6f7d909ac3a6581fbd729065717
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1fe72d35998dea48aeecaf7fc07783b0b553f24f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 09f33c5d27d9c52da58f0c8dda21c08812deec5ff373b4b6c05558a1992dbcd2
[INFO] running `Command { std: "docker" "start" "-a" "09f33c5d27d9c52da58f0c8dda21c08812deec5ff373b4b6c05558a1992dbcd2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking iana-time-zone v0.1.47
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking chrono v0.4.22
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling thiserror-impl v1.0.34
[INFO] [stderr]     Checking thiserror v1.0.34
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking activities v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/a9.rs:16:11
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let  (x, y) = function();
[INFO] [stdout]    |           ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `clamp` is never used
[INFO] [stdout]   --> src/bin/a22.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn clamp(n: i32, lower: i32, upper: 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 `div` is never used
[INFO] [stdout]   --> src/bin/a22.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn div(a: i32, b: i32) -> Option<i32> {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `concat` is never used
[INFO] [stdout]   --> src/bin/a22.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn concat(first: &str, second: &str) -> String {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]   --> src/bin/a24.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let data = vec![1, 2, 3, 4, 5]
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |         .collect();
[INFO] [stdout]    |          ------- type must be known at this point
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type must implement `FromIterator<i32>`
[INFO] [stdout] note: required by a bound in `collect`
[INFO] [stdout]   --> /rustc/1fe72d35998dea48aeecaf7fc07783b0b553f24f/library/core/src/iter/traits/iterator.rs:2079:4
[INFO] [stdout] help: consider giving `data` an explicit type
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let data: Vec<_> = vec![1, 2, 3, 4, 5]
[INFO] [stdout]    |             ++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0283`.
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Red` and `White` are never constructed
[INFO] [stdout]   --> src/bin/a12.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | enum Color {
[INFO] [stdout]    |      ----- variants in this enum
[INFO] [stdout] 27 |     Red,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 28 |     Black,
[INFO] [stdout] 29 |     White,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `activities` (bin "a24") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/a9.rs:16:11
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let  (x, y) = function();
[INFO] [stdout]    |           ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "09f33c5d27d9c52da58f0c8dda21c08812deec5ff373b4b6c05558a1992dbcd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09f33c5d27d9c52da58f0c8dda21c08812deec5ff373b4b6c05558a1992dbcd2", kill_on_drop: false }`
[INFO] [stdout] 09f33c5d27d9c52da58f0c8dda21c08812deec5ff373b4b6c05558a1992dbcd2
