[INFO] cloning repository https://github.com/deliangyang/test-work
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/deliangyang/test-work" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdeliangyang%2Ftest-work", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdeliangyang%2Ftest-work'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 06a871132d3d7ed07cfffd69609401561c5fc507
[INFO] checking deliangyang/test-work against try#5ef65a4ed75279dc1b7a26cedc27293a9f4ca8db for pr-143717
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdeliangyang%2Ftest-work" "/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/deliangyang/test-work
[INFO] finished tweaking git repo https://github.com/deliangyang/test-work
[INFO] tweaked toml for git repo https://github.com/deliangyang/test-work written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/deliangyang/test-work on toolchain 5ef65a4ed75279dc1b7a26cedc27293a9f4ca8db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5ef65a4ed75279dc1b7a26cedc27293a9f4ca8db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/deliangyang/test-work 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" "+5ef65a4ed75279dc1b7a26cedc27293a9f4ca8db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+5ef65a4ed75279dc1b7a26cedc27293a9f4ca8db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f0081efa260ad584a0beeb5870ea61b25b97536de674ce373a0801969de72316
[INFO] running `Command { std: "docker" "start" "-a" "f0081efa260ad584a0beeb5870ea61b25b97536de674ce373a0801969de72316", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f0081efa260ad584a0beeb5870ea61b25b97536de674ce373a0801969de72316", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0081efa260ad584a0beeb5870ea61b25b97536de674ce373a0801969de72316", kill_on_drop: false }`
[INFO] [stdout] f0081efa260ad584a0beeb5870ea61b25b97536de674ce373a0801969de72316
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+5ef65a4ed75279dc1b7a26cedc27293a9f4ca8db" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 97819363575b003d5dec50ea280ddd17ea2339351c1768553e0450adc1c0f265
[INFO] running `Command { std: "docker" "start" "-a" "97819363575b003d5dec50ea280ddd17ea2339351c1768553e0450adc1c0f265", kill_on_drop: false }`
[INFO] [stderr]     Checking tinyvec v0.3.4
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling unicode-normalization v0.1.13
[INFO] [stderr]    Compiling idna v0.2.0
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking test-work v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] attr: "test"
[INFO] [stdout] result: TokenStream [Ident { ident: "test", span: #0 bytes(563..567) }]
[INFO] [stdout] item: "fn test() {}"
[INFO] [stdout] warning: for loop over a `Result`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/bin/thread.rs:23:16
[INFO] [stdout]    |
[INFO] [stdout] 23 |     for txt in rx.recv() {
[INFO] [stdout]    |                ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 23 -     for txt in rx.recv() {
[INFO] [stdout] 23 +     while let Ok(txt) = rx.recv() {
[INFO] [stdout]    |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 23 -     for txt in rx.recv() {
[INFO] [stdout] 23 +     if let Ok(txt) = rx.recv() {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `longest_2` in this scope
[INFO] [stdout]   --> src/bin/ownership.rs:15:37
[INFO] [stdout]    |
[INFO] [stdout] 15 |     println!("the longest2 is: {}", longest_2(
[INFO] [stdout]    |                                     ^^^^^^^^^ help: a function with a similar name exists: `longest`
[INFO] [stdout] ...
[INFO] [stdout] 56 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stdout]    | ------------------------------------------------- similarly named function `longest` defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Struct` is never constructed
[INFO] [stdout]   --> src/bin/macro.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct Struct {}
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `children` are never read
[INFO] [stdout]  --> src/bin/ref_cell.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Node {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 7 |     value: i32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 8 |     parent: RefCell<Weak<Node>>,
[INFO] [stdout] 9 |     children: RefCell<Vec<Rc<Node>>>,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `test-work` (bin "ownership" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/bin/rc.rs:32:10
[INFO] [stdout]    |
[INFO] [stdout] 32 |     Cons(i32, Rc<List>),
[INFO] [stdout]    |     ---- ^^^  ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 32 -     Cons(i32, Rc<List>),
[INFO] [stdout] 32 +     Cons((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "97819363575b003d5dec50ea280ddd17ea2339351c1768553e0450adc1c0f265", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97819363575b003d5dec50ea280ddd17ea2339351c1768553e0450adc1c0f265", kill_on_drop: false }`
[INFO] [stdout] 97819363575b003d5dec50ea280ddd17ea2339351c1768553e0450adc1c0f265
