[INFO] cloning repository https://github.com/martonmoro/rust-for-rustaceans
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/martonmoro/rust-for-rustaceans" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmartonmoro%2Frust-for-rustaceans", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmartonmoro%2Frust-for-rustaceans'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ff7573bd89c42fe79e81f015590677f377efa2ed
[INFO] checking martonmoro/rust-for-rustaceans against try#012cd62c9add58ab3910e44c137d87db3ab70f61 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmartonmoro%2Frust-for-rustaceans" "/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/martonmoro/rust-for-rustaceans
[INFO] finished tweaking git repo https://github.com/martonmoro/rust-for-rustaceans
[INFO] tweaked toml for git repo https://github.com/martonmoro/rust-for-rustaceans written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/martonmoro/rust-for-rustaceans on toolchain 012cd62c9add58ab3910e44c137d87db3ab70f61
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/martonmoro/rust-for-rustaceans 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" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 122b80f93d08cee5ed8ee4d1b99ac4531dcb5d464015a3024b2e6b1dfbfcaf9e
[INFO] running `Command { std: "docker" "start" "-a" "122b80f93d08cee5ed8ee4d1b99ac4531dcb5d464015a3024b2e6b1dfbfcaf9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "122b80f93d08cee5ed8ee4d1b99ac4531dcb5d464015a3024b2e6b1dfbfcaf9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "122b80f93d08cee5ed8ee4d1b99ac4531dcb5d464015a3024b2e6b1dfbfcaf9e", kill_on_drop: false }`
[INFO] [stdout] 122b80f93d08cee5ed8ee4d1b99ac4531dcb5d464015a3024b2e6b1dfbfcaf9e
[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" "-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" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a873c4efe2cb678ca6accc41cebf92f42f2ade0c45ccb14ce789f1b40bbdbe9b
[INFO] running `Command { std: "docker" "start" "-a" "a873c4efe2cb678ca6accc41cebf92f42f2ade0c45ccb14ce789f1b40bbdbe9b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]     Checking parking_lot_core v0.9.12
[INFO] [stderr]     Checking mio v1.1.1
[INFO] [stderr]     Checking parking_lot v0.12.5
[INFO] [stderr]    Compiling quote v1.0.44
[INFO] [stderr]    Compiling syn v2.0.114
[INFO] [stderr]    Compiling tokio-macros v2.6.0
[INFO] [stderr]    Compiling ch7_proc_macro_impl v0.1.0 (/opt/rustwide/workdir/ch7_proc_macro_impl)
[INFO] [stdout] warning: unused import: `ParseStream`
[INFO] [stdout]  --> ch7_proc_macro_impl/src/lib.rs:6:20
[INFO] [stdout]   |
[INFO] [stdout] 6 |     parse::{Parse, ParseStream},
[INFO] [stdout]   |                    ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tokio v1.49.0
[INFO] [stderr]     Checking rust-for-rustaceans v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]  --> examples/ch7_attribute_macro.rs:5:57
[INFO] [stdout]   |
[INFO] [stdout] 5 |     std::thread::sleep(std::time::Duration::from_millis((150)));
[INFO] [stdout]   |                                                         ^   ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout] 5 -     std::thread::sleep(std::time::Duration::from_millis((150)));
[INFO] [stdout] 5 +     std::thread::sleep(std::time::Duration::from_millis(150 ));
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> examples/ch7_attribute_macro.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let x = 1 + 1;
[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: struct `MockDatabase` is never constructed
[INFO] [stdout]   --> examples/ch6_mocking.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct MockDatabase {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `write`
[INFO] [stdout]  --> examples/ch3_unit_error.rs:3:20
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fmt::{Display, write},
[INFO] [stdout]   |                    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `work` is never read
[INFO] [stdout]  --> examples/ch10_concurrency.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Task {
[INFO] [stdout]   |        ---- field in this struct
[INFO] [stdout] 7 |     id: u32,
[INFO] [stdout] 8 |     work: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> examples/ch10_concurrency.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct Worker {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 17 |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `foo`
[INFO] [stdout]  --> examples/ch7_macro_hygene.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 |         let foo = $val;
[INFO] [stdout]   |             ^^^
[INFO] [stdout] ...
[INFO] [stdout] 9 |     let_foo!(2);
[INFO] [stdout]   |     ----------- in this macro invocation
[INFO] [stdout]   |
[INFO] [stdout] help: `foo` is captured in macro and introduced a unused variable
[INFO] [stdout]  --> examples/ch7_macro_hygene.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 |         let foo = $val;
[INFO] [stdout]   |             ^^^
[INFO] [stdout] ...
[INFO] [stdout] 9 |     let_foo!(2);
[INFO] [stdout]   |     ----------- in this macro invocation
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]   = note: this warning originates in the macro `let_foo` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.01s
[INFO] running `Command { std: "docker" "inspect" "a873c4efe2cb678ca6accc41cebf92f42f2ade0c45ccb14ce789f1b40bbdbe9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a873c4efe2cb678ca6accc41cebf92f42f2ade0c45ccb14ce789f1b40bbdbe9b", kill_on_drop: false }`
[INFO] [stdout] a873c4efe2cb678ca6accc41cebf92f42f2ade0c45ccb14ce789f1b40bbdbe9b
