[INFO] cloning repository https://github.com/cloudlein/rust-learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cloudlein/rust-learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcloudlein%2Frust-learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcloudlein%2Frust-learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0979f83bc933a4963b43c1873601745c9e423812
[INFO] checking cloudlein/rust-learning against try#81ab7f2139295590561adbe6d5b0aaa2feff765f for pr-146470-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcloudlein%2Frust-learning" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/cloudlein/rust-learning
[INFO] finished tweaking git repo https://github.com/cloudlein/rust-learning
[INFO] tweaked toml for git repo https://github.com/cloudlein/rust-learning written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/cloudlein/rust-learning on toolchain 81ab7f2139295590561adbe6d5b0aaa2feff765f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+81ab7f2139295590561adbe6d5b0aaa2feff765f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/cloudlein/rust-learning 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" "+81ab7f2139295590561adbe6d5b0aaa2feff765f" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+81ab7f2139295590561adbe6d5b0aaa2feff765f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1c0eb47e5a80e71b3b055190d82347f31b8e8e23d7dd86f0fce38b2b239a5148
[INFO] running `Command { std: "docker" "start" "-a" "1c0eb47e5a80e71b3b055190d82347f31b8e8e23d7dd86f0fce38b2b239a5148", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1c0eb47e5a80e71b3b055190d82347f31b8e8e23d7dd86f0fce38b2b239a5148", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c0eb47e5a80e71b3b055190d82347f31b8e8e23d7dd86f0fce38b2b239a5148", kill_on_drop: false }`
[INFO] [stdout] 1c0eb47e5a80e71b3b055190d82347f31b8e8e23d7dd86f0fce38b2b239a5148
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+81ab7f2139295590561adbe6d5b0aaa2feff765f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e49e0769056169fc9066b9cc70a0877d78784f0b39d74c8780db5999dd53b11c
[INFO] running `Command { std: "docker" "start" "-a" "e49e0769056169fc9066b9cc70a0877d78784f0b39d74c8780db5999dd53b11c", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variants `Left`, `Right`, and `Down` are never constructed
[INFO] [stdout]   --> examples/rust_enums.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 59 | enum Direction {
[INFO] [stdout]    |      --------- variants in this enum
[INFO] [stdout] 60 |     Left,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 61 |     Right,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 62 |     Up,
[INFO] [stdout] 63 |     Down,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Error` is never constructed
[INFO] [stdout]   --> examples/rust_enums.rs:73:5
[INFO] [stdout]    |
[INFO] [stdout] 71 | enum LoginStatus {
[INFO] [stdout]    |      ----------- variant in this enum
[INFO] [stdout] 72 |     Success(String),
[INFO] [stdout] 73 |     Error(String),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_num`
[INFO] [stdout]  --> examples/rust_data_type.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let my_num = 5;         // integer
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_num`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_double`
[INFO] [stdout]  --> examples/rust_data_type.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let my_double = 5.99;   // float
[INFO] [stdout]   |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_double`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_letter`
[INFO] [stdout]  --> examples/rust_data_type.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let my_letter = 'D';    // character
[INFO] [stdout]   |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_letter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_bool`
[INFO] [stdout]  --> examples/rust_data_type.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let my_bool = true;     // boolean
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_bool`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_text`
[INFO] [stdout]  --> examples/rust_data_type.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let my_text = "Hello";  // string
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_text`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ptr::hash`
[INFO] [stdout]  --> examples/rust_data_structures.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::ptr::hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/rust_arrays.rs:83:9
[INFO] [stdout]    |
[INFO] [stdout] 83 |     let mut cars = ["Volvo", "BMW", "Ford"];
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cars`
[INFO] [stdout]   --> examples/rust_arrays.rs:83:9
[INFO] [stdout]    |
[INFO] [stdout] 83 |     let mut cars = ["Volvo", "BMW", "Ford"];
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_cars`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `capitalCities` should have a snake case name
[INFO] [stdout]   --> examples/rust_data_structures.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let mut capitalCities = HashMap::new();
[INFO] [stdout]    |             ^^^^^^^^^^^^^ help: convert the identifier to snake case: `capital_cities`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `time1`
[INFO] [stdout]   --> examples/rust_condition.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let time1 = 20;
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_time1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `capitalCities` should have a snake case name
[INFO] [stdout]   --> examples/rust_hashmap.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let mut capitalCities = HashMap::new();
[INFO] [stdout]    |             ^^^^^^^^^^^^^ help: convert the identifier to snake case: `capital_cities`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> examples/rust_scope.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let x = 10;
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "e49e0769056169fc9066b9cc70a0877d78784f0b39d74c8780db5999dd53b11c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e49e0769056169fc9066b9cc70a0877d78784f0b39d74c8780db5999dd53b11c", kill_on_drop: false }`
[INFO] [stdout] e49e0769056169fc9066b9cc70a0877d78784f0b39d74c8780db5999dd53b11c