[INFO] updating cached repository https://github.com/syuni/rust-by-example
[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] b3f4cf9a5219e47165d823446a761a963ce48beb
[INFO] testing syuni/rust-by-example against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsyuni%2Frust-by-example" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/syuni/rust-by-example on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/syuni/rust-by-example
[INFO] finished tweaking git repo https://github.com/syuni/rust-by-example
[INFO] tweaked toml for git repo https://github.com/syuni/rust-by-example written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/syuni/rust-by-example already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] warning: file found to be present in multiple build targets: /workspace/builds/worker-0/source/src/8_2_4.rs
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ef77e735c62cadaf603b721fdbb34847b85d8671e57a3fcfb3b8e43c4f8cb796
[INFO] running `"docker" "start" "-a" "ef77e735c62cadaf603b721fdbb34847b85d8671e57a3fcfb3b8e43c4f8cb796"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: file found to be present in multiple build targets: /opt/rustwide/workdir/src/8_2_4.rs
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust-by-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]   --> src/6.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |         2 * x;
[INFO] [stderr]    |         ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `x`
[INFO] [stderr]  --> src/17_1.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     x: f64,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `y`
[INFO] [stderr]  --> src/17_1.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     y: f64,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stderr]   --> src/8_2_6_2.rs:23:16
[INFO] [stderr]    |
[INFO] [stderr] 23 |         array2.into_iter().find(|&&x| x == 2)
[INFO] [stderr]    |                ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/18_4_1.rs:14:61
[INFO] [stderr]    |
[INFO] [stderr] 14 |         Err(why) => panic!("couldn't open {}: {}", display, Error::description(&why)),
[INFO] [stderr]    |                                                             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/18_4_1.rs:21:61
[INFO] [stderr]    |
[INFO] [stderr] 21 |         Err(why) => panic!("couldn't read {}: {}", display, Error::description(&why)),
[INFO] [stderr]    |                                                             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused label
[INFO] [stderr]  --> src/7_2_1.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |         'inner: loop {
[INFO] [stderr]   |         ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_labels)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stderr]   --> src/8_2_6_1.rs:16:40
[INFO] [stderr]    |
[INFO] [stderr] 16 |     println!("2 in array2: {}", array2.into_iter().any(|&x| x == 2));
[INFO] [stderr]    |                                        ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/18_5_1.rs:14:53
[INFO] [stderr]    |
[INFO] [stderr] 14 |         Err(why) => panic!("couldn't spawn wc: {}", Error::description(&why)),
[INFO] [stderr]    |                                                     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/18_5_1.rs:23:62
[INFO] [stderr]    |
[INFO] [stderr] 23 |         Err(why) => panic!("couldn't write to wc stdin: {}", Error::description(&why)),
[INFO] [stderr]    |                                                              ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/18_5_1.rs:31:59
[INFO] [stderr]    |
[INFO] [stderr] 31 |         Err(why) => panic!("couldn't read wc stdout: {}", Error::description(&why)),
[INFO] [stderr]    |                                                           ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: expected one of `:`, `@`, or `|`, found `,`
[INFO] [stderr]  --> src/13_7_1.rs:6:26
[INFO] [stderr]   |
[INFO] [stderr] 6 |     fn contains(&self, &A, &B) -> bool; // `A`と`B`の両方を明示的に要求する
[INFO] [stderr]   |                          ^ expected one of `:`, `@`, or `|`
[INFO] [stderr] 
[INFO] [stderr] error: expected one of `:`, `@`, or `|`, found `)`
[INFO] [stderr]  --> src/13_7_1.rs:6:30
[INFO] [stderr]   |
[INFO] [stderr] 6 |     fn contains(&self, &A, &B) -> bool; // `A`と`B`の両方を明示的に要求する
[INFO] [stderr]   |                              ^ expected one of `:`, `@`, or `|`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `noisy_unused_function`
[INFO] [stderr]  --> src/12_1.rs:7:4
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn noisy_unused_function() {}
[INFO] [stderr]   |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `rust-by-example`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `display`
[INFO] [stderr]  --> src/18_3.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let display = path.display();
[INFO] [stderr]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_display`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Structure`
[INFO] [stderr]   --> src/1_2.rs:27:12
[INFO] [stderr]    |
[INFO] [stderr] 27 |     struct Structure(i32);
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "ef77e735c62cadaf603b721fdbb34847b85d8671e57a3fcfb3b8e43c4f8cb796"`
[INFO] running `"docker" "rm" "-f" "ef77e735c62cadaf603b721fdbb34847b85d8671e57a3fcfb3b8e43c4f8cb796"`
[INFO] [stdout] ef77e735c62cadaf603b721fdbb34847b85d8671e57a3fcfb3b8e43c4f8cb796