[INFO] updating cached repository https://github.com/fnick851/rust-the-book [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"` [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] f66c9b9c0a7e23228a2f624e1c5fee5d4f5fa2b7 [INFO] checking fnick851/rust-the-book against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffnick851%2Frust-the-book" "/workspace/builds/worker-4/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/fnick851/rust-the-book on toolchain 1a608893c03d7722effeb0058e82770bd36b4b3c [INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/fnick851/rust-the-book [INFO] finished tweaking git repo https://github.com/fnick851/rust-the-book [INFO] tweaked toml for git repo https://github.com/fnick851/rust-the-book written to /workspace/builds/worker-4/source/Cargo.toml [INFO] crate git repo https://github.com/fnick851/rust-the-book already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "check" "--frozen" "--all" "--all-targets"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 86791fa36ac8d479d2e1b3f903dd2ea34fa9cd01e8a3232afd7502678f1a3fa5 [INFO] running `"docker" "start" "-a" "86791fa36ac8d479d2e1b3f903dd2ea34fa9cd01e8a3232afd7502678f1a3fa5"` [INFO] [stderr] Checking ferris-says v0.1.1 [INFO] [stderr] Checking hello_rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: function is never used: `seat_at_table` [INFO] [stderr] --> src/bin/restrt_lib.rs:6:12 [INFO] [stderr] | [INFO] [stderr] 6 | fn seat_at_table() {} [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `take_order` [INFO] [stderr] --> src/bin/restrt_lib.rs:10:12 [INFO] [stderr] | [INFO] [stderr] 10 | fn take_order() {} [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `serve_order` [INFO] [stderr] --> src/bin/restrt_lib.rs:12:12 [INFO] [stderr] | [INFO] [stderr] 12 | fn serve_order() {} [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `take_payment` [INFO] [stderr] --> src/bin/restrt_lib.rs:14:12 [INFO] [stderr] | [INFO] [stderr] 14 | fn take_payment() {} [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: field is never read: `seasonal_fruit` [INFO] [stderr] --> src/bin/super_path.rs:14:9 [INFO] [stderr] | [INFO] [stderr] 14 | seasonal_fruit: String, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `state` [INFO] [stderr] --> src/bin/enum.rs:29:26 [INFO] [stderr] | [INFO] [stderr] 29 | if let Coin::Quarter(state) = some_value { [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_state` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/bin/result.rs:9:9 [INFO] [stderr] | [INFO] [stderr] 9 | let f = match f { [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_f` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/bin/result.rs:20:5 [INFO] [stderr] | [INFO] [stderr] 20 | read_username_from_file(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s` [INFO] [stderr] --> src/bin/ownership.rs:5:13 [INFO] [stderr] | [INFO] [stderr] 5 | let s = "hello"; // s is valid from this point forward [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_s` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s1` [INFO] [stderr] --> src/bin/ownership.rs:50:17 [INFO] [stderr] | [INFO] [stderr] 50 | let s1 = gives_ownership(); // gives_ownership moves its return [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_s1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s3` [INFO] [stderr] --> src/bin/ownership.rs:55:17 [INFO] [stderr] | [INFO] [stderr] 55 | let s3 = takes_and_gives_back(s2); // s2 is moved into [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_s3` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/bin/vector.rs:2:9 [INFO] [stderr] | [INFO] [stderr] 2 | let mut v = vec![1, 2, 3, 4, 5]; [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `state` [INFO] [stderr] --> src/bin/enum.rs:29:26 [INFO] [stderr] | [INFO] [stderr] 29 | if let Coin::Quarter(state) = some_value { [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_state` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Alaska` [INFO] [stderr] --> src/bin/enum.rs:5:9 [INFO] [stderr] | [INFO] [stderr] 5 | Alaska, [INFO] [stderr] | ^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Penny` [INFO] [stderr] --> src/bin/enum.rs:8:9 [INFO] [stderr] | [INFO] [stderr] 8 | Penny, [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Nickel` [INFO] [stderr] --> src/bin/enum.rs:9:9 [INFO] [stderr] | [INFO] [stderr] 9 | Nickel, [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Dime` [INFO] [stderr] --> src/bin/enum.rs:10:9 [INFO] [stderr] | [INFO] [stderr] 10 | Dime, [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/bin/vector.rs:2:9 [INFO] [stderr] | [INFO] [stderr] 2 | let mut v = vec![1, 2, 3, 4, 5]; [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s` [INFO] [stderr] --> src/bin/ownership.rs:5:13 [INFO] [stderr] | [INFO] [stderr] 5 | let s = "hello"; // s is valid from this point forward [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_s` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s1` [INFO] [stderr] --> src/bin/ownership.rs:50:17 [INFO] [stderr] | [INFO] [stderr] 50 | let s1 = gives_ownership(); // gives_ownership moves its return [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_s1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s3` [INFO] [stderr] --> src/bin/ownership.rs:55:17 [INFO] [stderr] | [INFO] [stderr] 55 | let s3 = takes_and_gives_back(s2); // s2 is moved into [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_s3` [INFO] [stderr] [INFO] [stderr] warning: function is never used: `seat_at_table` [INFO] [stderr] --> src/bin/restrt_lib.rs:6:12 [INFO] [stderr] | [INFO] [stderr] 6 | fn seat_at_table() {} [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `take_order` [INFO] [stderr] --> src/bin/restrt_lib.rs:10:12 [INFO] [stderr] | [INFO] [stderr] 10 | fn take_order() {} [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `serve_order` [INFO] [stderr] --> src/bin/restrt_lib.rs:12:12 [INFO] [stderr] | [INFO] [stderr] 12 | fn serve_order() {} [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `take_payment` [INFO] [stderr] --> src/bin/restrt_lib.rs:14:12 [INFO] [stderr] | [INFO] [stderr] 14 | fn take_payment() {} [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: field is never read: `seasonal_fruit` [INFO] [stderr] --> src/bin/super_path.rs:14:9 [INFO] [stderr] | [INFO] [stderr] 14 | seasonal_fruit: String, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/bin/result.rs:9:9 [INFO] [stderr] | [INFO] [stderr] 9 | let f = match f { [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_f` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/bin/result.rs:20:5 [INFO] [stderr] | [INFO] [stderr] 20 | read_username_from_file(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 29.85s [INFO] running `"docker" "inspect" "86791fa36ac8d479d2e1b3f903dd2ea34fa9cd01e8a3232afd7502678f1a3fa5"` [INFO] running `"docker" "rm" "-f" "86791fa36ac8d479d2e1b3f903dd2ea34fa9cd01e8a3232afd7502678f1a3fa5"` [INFO] [stdout] 86791fa36ac8d479d2e1b3f903dd2ea34fa9cd01e8a3232afd7502678f1a3fa5