Dec 17 23:24:51.974 INFO checking hasanhaja/rust_book_workthrough against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 23:24:51.974 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/hasanhaja/rust_book_workthrough:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 23:24:52.475 INFO [stdout] 15f80a2acfbae037a4c8b5a61976e20dee0cbeed795a6c6c69dda76d4fa91b05
Dec 17 23:24:52.477 INFO running `"docker" "start" "-a" "15f80a2acfbae037a4c8b5a61976e20dee0cbeed795a6c6c69dda76d4fa91b05"`
Dec 17 23:24:55.267 INFO [stderr]     Checking rust_book_workthrough v0.1.0 (/opt/crater/workdir)
Dec 17 23:24:55.748 INFO [stderr] warning: unused variable: `item`
Dec 17 23:24:55.748 INFO [stderr]   --> src/generics/mod.rs:70:17
Dec 17 23:24:55.748 INFO [stderr]    |
Dec 17 23:24:55.748 INFO [stderr] 70 | fn notify_mult1(item: impl Summary + Display) { // Placeholder
Dec 17 23:24:55.748 INFO [stderr]    |                 ^^^^ help: consider using `_item` instead
Dec 17 23:24:55.748 INFO [stderr]    |
Dec 17 23:24:55.749 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 23:24:55.749 INFO [stderr] 
Dec 17 23:24:55.749 INFO [stderr] warning: unused variable: `item`
Dec 17 23:24:55.749 INFO [stderr]   --> src/generics/mod.rs:73:39
Dec 17 23:24:55.749 INFO [stderr]    |
Dec 17 23:24:55.749 INFO [stderr] 73 | fn notify_mult2<T: Summary + Display>(item: T) {
Dec 17 23:24:55.749 INFO [stderr]    |                                       ^^^^ help: consider using `_item` instead
Dec 17 23:24:55.749 INFO [stderr] 
Dec 17 23:24:55.749 INFO [stderr] warning: unused variable: `t`
Dec 17 23:24:55.749 INFO [stderr]   --> src/generics/mod.rs:77:51
Dec 17 23:24:55.749 INFO [stderr]    |
Dec 17 23:24:55.749 INFO [stderr] 77 | fn some_fn1<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {
Dec 17 23:24:55.749 INFO [stderr]    |                                                   ^ help: consider using `_t` instead
Dec 17 23:24:55.749 INFO [stderr] 
Dec 17 23:24:55.749 INFO [stderr] warning: unused variable: `u`
Dec 17 23:24:55.749 INFO [stderr]   --> src/generics/mod.rs:77:57
Dec 17 23:24:55.749 INFO [stderr]    |
Dec 17 23:24:55.749 INFO [stderr] 77 | fn some_fn1<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {
Dec 17 23:24:55.749 INFO [stderr]    |                                                         ^ help: consider using `_u` instead
Dec 17 23:24:55.749 INFO [stderr] 
Dec 17 23:24:55.749 INFO [stderr] warning: unused variable: `t`
Dec 17 23:24:55.749 INFO [stderr]   --> src/generics/mod.rs:82:19
Dec 17 23:24:55.749 INFO [stderr]    |
Dec 17 23:24:55.749 INFO [stderr] 82 | fn some_fn2<T, U>(t: T, u: U) -> i32
Dec 17 23:24:55.749 INFO [stderr]    |                   ^ help: consider using `_t` instead
Dec 17 23:24:55.749 INFO [stderr] 
Dec 17 23:24:55.749 INFO [stderr] warning: unused variable: `u`
Dec 17 23:24:55.749 INFO [stderr]   --> src/generics/mod.rs:82:25
Dec 17 23:24:55.749 INFO [stderr]    |
Dec 17 23:24:55.749 INFO [stderr] 82 | fn some_fn2<T, U>(t: T, u: U) -> i32
Dec 17 23:24:55.749 INFO [stderr]    |                         ^ help: consider using `_u` instead
Dec 17 23:24:55.749 INFO [stderr] 
Dec 17 23:24:55.768 INFO [stderr] warning: field is never used: `y`
Dec 17 23:24:55.768 INFO [stderr]   --> src/generics/mod.rs:39:5
Dec 17 23:24:55.768 INFO [stderr]    |
Dec 17 23:24:55.768 INFO [stderr] 39 |     y: T,
Dec 17 23:24:55.768 INFO [stderr]    |     ^^^^
Dec 17 23:24:55.768 INFO [stderr]    |
Dec 17 23:24:55.768 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 23:24:55.768 INFO [stderr] 
Dec 17 23:24:55.768 INFO [stderr] warning: method is never used: `distance_from_origin`
Dec 17 23:24:55.768 INFO [stderr]   --> src/generics/mod.rs:55:5
Dec 17 23:24:55.768 INFO [stderr]    |
Dec 17 23:24:55.768 INFO [stderr] 55 |     pub fn distance_from_origin(&self) -> f32 {
Dec 17 23:24:55.768 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:24:55.768 INFO [stderr] 
Dec 17 23:24:55.769 INFO [stderr] warning: function is never used: `notify_mult1`
Dec 17 23:24:55.769 INFO [stderr]   --> src/generics/mod.rs:70:1
Dec 17 23:24:55.769 INFO [stderr]    |
Dec 17 23:24:55.769 INFO [stderr] 70 | fn notify_mult1(item: impl Summary + Display) { // Placeholder
Dec 17 23:24:55.769 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:24:55.769 INFO [stderr] 
Dec 17 23:24:55.769 INFO [stderr] warning: function is never used: `notify_mult2`
Dec 17 23:24:55.769 INFO [stderr]   --> src/generics/mod.rs:73:1
Dec 17 23:24:55.769 INFO [stderr]    |
Dec 17 23:24:55.769 INFO [stderr] 73 | fn notify_mult2<T: Summary + Display>(item: T) {
Dec 17 23:24:55.769 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:24:55.769 INFO [stderr] 
Dec 17 23:24:55.769 INFO [stderr] warning: function is never used: `some_fn1`
Dec 17 23:24:55.769 INFO [stderr]   --> src/generics/mod.rs:77:1
Dec 17 23:24:55.769 INFO [stderr]    |
Dec 17 23:24:55.769 INFO [stderr] 77 | fn some_fn1<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {
Dec 17 23:24:55.769 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:24:55.769 INFO [stderr] 
Dec 17 23:24:55.769 INFO [stderr] warning: function is never used: `some_fn2`
Dec 17 23:24:55.769 INFO [stderr]   --> src/generics/mod.rs:82:1
Dec 17 23:24:55.769 INFO [stderr]    |
Dec 17 23:24:55.769 INFO [stderr] 82 | / fn some_fn2<T, U>(t: T, u: U) -> i32
Dec 17 23:24:55.769 INFO [stderr] 83 | |     where T: Display + Clone,
Dec 17 23:24:55.769 INFO [stderr] 84 | |           U: Clone + Debug
Dec 17 23:24:55.769 INFO [stderr] 85 | | {
Dec 17 23:24:55.769 INFO [stderr] 86 | |     // Placeholder
Dec 17 23:24:55.769 INFO [stderr] 87 | |     0
Dec 17 23:24:55.769 INFO [stderr] 88 | | }
Dec 17 23:24:55.769 INFO [stderr]    | |_^
Dec 17 23:24:55.769 INFO [stderr] 
Dec 17 23:24:55.769 INFO [stderr] warning: struct is never constructed: `NewsArticle`
Dec 17 23:24:55.769 INFO [stderr]    --> src/generics/mod.rs:106:1
Dec 17 23:24:55.769 INFO [stderr]     |
Dec 17 23:24:55.769 INFO [stderr] 106 | pub struct NewsArticle {
Dec 17 23:24:55.769 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:24:55.769 INFO [stderr] 
Dec 17 23:24:55.784 INFO [stderr] warning: unused variable: `item`
Dec 17 23:24:55.784 INFO [stderr]   --> src/generics/mod.rs:70:17
Dec 17 23:24:55.784 INFO [stderr]    |
Dec 17 23:24:55.784 INFO [stderr] 70 | fn notify_mult1(item: impl Summary + Display) { // Placeholder
Dec 17 23:24:55.784 INFO [stderr]    |                 ^^^^ help: consider using `_item` instead
Dec 17 23:24:55.784 INFO [stderr]    |
Dec 17 23:24:55.785 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 23:24:55.785 INFO [stderr] 
Dec 17 23:24:55.785 INFO [stderr] warning: unused variable: `item`
Dec 17 23:24:55.785 INFO [stderr]   --> src/generics/mod.rs:73:39
Dec 17 23:24:55.785 INFO [stderr]    |
Dec 17 23:24:55.785 INFO [stderr] 73 | fn notify_mult2<T: Summary + Display>(item: T) {
Dec 17 23:24:55.785 INFO [stderr]    |                                       ^^^^ help: consider using `_item` instead
Dec 17 23:24:55.785 INFO [stderr] 
Dec 17 23:24:55.785 INFO [stderr] warning: unused variable: `t`
Dec 17 23:24:55.785 INFO [stderr]   --> src/generics/mod.rs:77:51
Dec 17 23:24:55.785 INFO [stderr]    |
Dec 17 23:24:55.785 INFO [stderr] 77 | fn some_fn1<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {
Dec 17 23:24:55.785 INFO [stderr]    |                                                   ^ help: consider using `_t` instead
Dec 17 23:24:55.785 INFO [stderr] 
Dec 17 23:24:55.785 INFO [stderr] warning: unused variable: `u`
Dec 17 23:24:55.785 INFO [stderr]   --> src/generics/mod.rs:77:57
Dec 17 23:24:55.785 INFO [stderr]    |
Dec 17 23:24:55.785 INFO [stderr] 77 | fn some_fn1<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {
Dec 17 23:24:55.785 INFO [stderr]    |                                                         ^ help: consider using `_u` instead
Dec 17 23:24:55.785 INFO [stderr] 
Dec 17 23:24:55.785 INFO [stderr] warning: unused variable: `t`
Dec 17 23:24:55.785 INFO [stderr]   --> src/generics/mod.rs:82:19
Dec 17 23:24:55.785 INFO [stderr]    |
Dec 17 23:24:55.785 INFO [stderr] 82 | fn some_fn2<T, U>(t: T, u: U) -> i32
Dec 17 23:24:55.785 INFO [stderr]    |                   ^ help: consider using `_t` instead
Dec 17 23:24:55.785 INFO [stderr] 
Dec 17 23:24:55.785 INFO [stderr] warning: unused variable: `u`
Dec 17 23:24:55.785 INFO [stderr]   --> src/generics/mod.rs:82:25
Dec 17 23:24:55.785 INFO [stderr]    |
Dec 17 23:24:55.785 INFO [stderr] 82 | fn some_fn2<T, U>(t: T, u: U) -> i32
Dec 17 23:24:55.785 INFO [stderr]    |                         ^ help: consider using `_u` instead
Dec 17 23:24:55.785 INFO [stderr] 
Dec 17 23:24:55.828 INFO [stderr] warning: field is never used: `y`
Dec 17 23:24:55.828 INFO [stderr]   --> src/generics/mod.rs:39:5
Dec 17 23:24:55.828 INFO [stderr]    |
Dec 17 23:24:55.828 INFO [stderr] 39 |     y: T,
Dec 17 23:24:55.828 INFO [stderr]    |     ^^^^
Dec 17 23:24:55.828 INFO [stderr]    |
Dec 17 23:24:55.828 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 23:24:55.828 INFO [stderr] 
Dec 17 23:24:55.829 INFO [stderr] warning: method is never used: `distance_from_origin`
Dec 17 23:24:55.829 INFO [stderr]   --> src/generics/mod.rs:55:5
Dec 17 23:24:55.829 INFO [stderr]    |
Dec 17 23:24:55.829 INFO [stderr] 55 |     pub fn distance_from_origin(&self) -> f32 {
Dec 17 23:24:55.829 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:24:55.829 INFO [stderr] 
Dec 17 23:24:55.829 INFO [stderr] warning: function is never used: `notify_mult1`
Dec 17 23:24:55.829 INFO [stderr]   --> src/generics/mod.rs:70:1
Dec 17 23:24:55.829 INFO [stderr]    |
Dec 17 23:24:55.829 INFO [stderr] 70 | fn notify_mult1(item: impl Summary + Display) { // Placeholder
Dec 17 23:24:55.829 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:24:55.829 INFO [stderr] 
Dec 17 23:24:55.829 INFO [stderr] warning: function is never used: `notify_mult2`
Dec 17 23:24:55.829 INFO [stderr]   --> src/generics/mod.rs:73:1
Dec 17 23:24:55.829 INFO [stderr]    |
Dec 17 23:24:55.829 INFO [stderr] 73 | fn notify_mult2<T: Summary + Display>(item: T) {
Dec 17 23:24:55.829 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:24:55.829 INFO [stderr] 
Dec 17 23:24:55.829 INFO [stderr] warning: function is never used: `some_fn1`
Dec 17 23:24:55.829 INFO [stderr]   --> src/generics/mod.rs:77:1
Dec 17 23:24:55.829 INFO [stderr]    |
Dec 17 23:24:55.829 INFO [stderr] 77 | fn some_fn1<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {
Dec 17 23:24:55.829 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:24:55.829 INFO [stderr] 
Dec 17 23:24:55.830 INFO [stderr] warning: function is never used: `some_fn2`
Dec 17 23:24:55.830 INFO [stderr]   --> src/generics/mod.rs:82:1
Dec 17 23:24:55.830 INFO [stderr]    |
Dec 17 23:24:55.830 INFO [stderr] 82 | / fn some_fn2<T, U>(t: T, u: U) -> i32
Dec 17 23:24:55.830 INFO [stderr] 83 | |     where T: Display + Clone,
Dec 17 23:24:55.830 INFO [stderr] 84 | |           U: Clone + Debug
Dec 17 23:24:55.830 INFO [stderr] 85 | | {
Dec 17 23:24:55.830 INFO [stderr] 86 | |     // Placeholder
Dec 17 23:24:55.830 INFO [stderr] 87 | |     0
Dec 17 23:24:55.830 INFO [stderr] 88 | | }
Dec 17 23:24:55.830 INFO [stderr]    | |_^
Dec 17 23:24:55.830 INFO [stderr] 
Dec 17 23:24:55.830 INFO [stderr] warning: struct is never constructed: `NewsArticle`
Dec 17 23:24:55.830 INFO [stderr]    --> src/generics/mod.rs:106:1
Dec 17 23:24:55.830 INFO [stderr]     |
Dec 17 23:24:55.830 INFO [stderr] 106 | pub struct NewsArticle {
Dec 17 23:24:55.830 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:24:55.830 INFO [stderr] 
Dec 17 23:24:55.893 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.70s
Dec 17 23:24:57.380 INFO running `"docker" "inspect" "15f80a2acfbae037a4c8b5a61976e20dee0cbeed795a6c6c69dda76d4fa91b05"`
Dec 17 23:24:57.774 INFO running `"docker" "rm" "-f" "15f80a2acfbae037a4c8b5a61976e20dee0cbeed795a6c6c69dda76d4fa91b05"`
Dec 17 23:24:58.096 INFO [stdout] 15f80a2acfbae037a4c8b5a61976e20dee0cbeed795a6c6c69dda76d4fa91b05