Dec 19 16:12:40.223 INFO checking hasanhaja/rust_book_workthrough against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 16:12:40.223 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-5/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 16:12:40.680 INFO [stdout] 2a77faa7fb08992898e185228d929f449c022aaa3822317b3bab04ba780ef13f
Dec 19 16:12:40.684 INFO running `"docker" "start" "-a" "2a77faa7fb08992898e185228d929f449c022aaa3822317b3bab04ba780ef13f"`
Dec 19 16:12:42.068 INFO [stderr]     Checking rust_book_workthrough v0.1.0 (/opt/crater/workdir)
Dec 19 16:12:42.321 INFO [stderr] warning: unused variable: `item`
Dec 19 16:12:42.321 INFO [stderr]   --> src/generics/mod.rs:70:17
Dec 19 16:12:42.321 INFO [stderr]    |
Dec 19 16:12:42.321 INFO [stderr] 70 | fn notify_mult1(item: impl Summary + Display) { // Placeholder
Dec 19 16:12:42.321 INFO [stderr]    |                 ^^^^ help: consider using `_item` instead
Dec 19 16:12:42.321 INFO [stderr]    |
Dec 19 16:12:42.321 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 16:12:42.321 INFO [stderr] 
Dec 19 16:12:42.321 INFO [stderr] warning: unused variable: `item`
Dec 19 16:12:42.321 INFO [stderr]   --> src/generics/mod.rs:73:39
Dec 19 16:12:42.321 INFO [stderr]    |
Dec 19 16:12:42.321 INFO [stderr] 73 | fn notify_mult2<T: Summary + Display>(item: T) {
Dec 19 16:12:42.321 INFO [stderr]    |                                       ^^^^ help: consider using `_item` instead
Dec 19 16:12:42.321 INFO [stderr] 
Dec 19 16:12:42.321 INFO [stderr] warning: unused variable: `t`
Dec 19 16:12:42.321 INFO [stderr]   --> src/generics/mod.rs:77:51
Dec 19 16:12:42.321 INFO [stderr]    |
Dec 19 16:12:42.321 INFO [stderr] 77 | fn some_fn1<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {
Dec 19 16:12:42.321 INFO [stderr]    |                                                   ^ help: consider using `_t` instead
Dec 19 16:12:42.321 INFO [stderr] 
Dec 19 16:12:42.321 INFO [stderr] warning: unused variable: `u`
Dec 19 16:12:42.321 INFO [stderr]   --> src/generics/mod.rs:77:57
Dec 19 16:12:42.321 INFO [stderr]    |
Dec 19 16:12:42.321 INFO [stderr] 77 | fn some_fn1<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {
Dec 19 16:12:42.321 INFO [stderr]    |                                                         ^ help: consider using `_u` instead
Dec 19 16:12:42.321 INFO [stderr] 
Dec 19 16:12:42.321 INFO [stderr] warning: unused variable: `t`
Dec 19 16:12:42.321 INFO [stderr]   --> src/generics/mod.rs:82:19
Dec 19 16:12:42.321 INFO [stderr]    |
Dec 19 16:12:42.321 INFO [stderr] 82 | fn some_fn2<T, U>(t: T, u: U) -> i32
Dec 19 16:12:42.321 INFO [stderr]    |                   ^ help: consider using `_t` instead
Dec 19 16:12:42.321 INFO [stderr] 
Dec 19 16:12:42.321 INFO [stderr] warning: unused variable: `u`
Dec 19 16:12:42.321 INFO [stderr]   --> src/generics/mod.rs:82:25
Dec 19 16:12:42.321 INFO [stderr]    |
Dec 19 16:12:42.321 INFO [stderr] 82 | fn some_fn2<T, U>(t: T, u: U) -> i32
Dec 19 16:12:42.321 INFO [stderr]    |                         ^ help: consider using `_u` instead
Dec 19 16:12:42.321 INFO [stderr] 
Dec 19 16:12:42.329 INFO [stderr] warning: unused variable: `item`
Dec 19 16:12:42.329 INFO [stderr]   --> src/generics/mod.rs:70:17
Dec 19 16:12:42.329 INFO [stderr]    |
Dec 19 16:12:42.329 INFO [stderr] 70 | fn notify_mult1(item: impl Summary + Display) { // Placeholder
Dec 19 16:12:42.329 INFO [stderr]    |                 ^^^^ help: consider using `_item` instead
Dec 19 16:12:42.329 INFO [stderr]    |
Dec 19 16:12:42.331 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 16:12:42.331 INFO [stderr] 
Dec 19 16:12:42.332 INFO [stderr] warning: unused variable: `item`
Dec 19 16:12:42.332 INFO [stderr]   --> src/generics/mod.rs:73:39
Dec 19 16:12:42.332 INFO [stderr]    |
Dec 19 16:12:42.332 INFO [stderr] 73 | fn notify_mult2<T: Summary + Display>(item: T) {
Dec 19 16:12:42.332 INFO [stderr]    |                                       ^^^^ help: consider using `_item` instead
Dec 19 16:12:42.332 INFO [stderr] 
Dec 19 16:12:42.332 INFO [stderr] warning: unused variable: `t`
Dec 19 16:12:42.332 INFO [stderr]   --> src/generics/mod.rs:77:51
Dec 19 16:12:42.332 INFO [stderr]    |
Dec 19 16:12:42.332 INFO [stderr] 77 | fn some_fn1<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {
Dec 19 16:12:42.332 INFO [stderr]    |                                                   ^ help: consider using `_t` instead
Dec 19 16:12:42.332 INFO [stderr] 
Dec 19 16:12:42.332 INFO [stderr] warning: unused variable: `u`
Dec 19 16:12:42.332 INFO [stderr]   --> src/generics/mod.rs:77:57
Dec 19 16:12:42.332 INFO [stderr]    |
Dec 19 16:12:42.332 INFO [stderr] 77 | fn some_fn1<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {
Dec 19 16:12:42.332 INFO [stderr]    |                                                         ^ help: consider using `_u` instead
Dec 19 16:12:42.332 INFO [stderr] 
Dec 19 16:12:42.332 INFO [stderr] warning: unused variable: `t`
Dec 19 16:12:42.332 INFO [stderr]   --> src/generics/mod.rs:82:19
Dec 19 16:12:42.332 INFO [stderr]    |
Dec 19 16:12:42.332 INFO [stderr] 82 | fn some_fn2<T, U>(t: T, u: U) -> i32
Dec 19 16:12:42.332 INFO [stderr]    |                   ^ help: consider using `_t` instead
Dec 19 16:12:42.332 INFO [stderr] 
Dec 19 16:12:42.332 INFO [stderr] warning: unused variable: `u`
Dec 19 16:12:42.333 INFO [stderr]   --> src/generics/mod.rs:82:25
Dec 19 16:12:42.333 INFO [stderr]    |
Dec 19 16:12:42.333 INFO [stderr] 82 | fn some_fn2<T, U>(t: T, u: U) -> i32
Dec 19 16:12:42.333 INFO [stderr]    |                         ^ help: consider using `_u` instead
Dec 19 16:12:42.333 INFO [stderr] 
Dec 19 16:12:42.333 INFO [stderr] warning: field is never used: `y`
Dec 19 16:12:42.333 INFO [stderr]   --> src/generics/mod.rs:39:5
Dec 19 16:12:42.333 INFO [stderr]    |
Dec 19 16:12:42.333 INFO [stderr] 39 |     y: T,
Dec 19 16:12:42.333 INFO [stderr]    |     ^^^^
Dec 19 16:12:42.333 INFO [stderr]    |
Dec 19 16:12:42.333 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 16:12:42.333 INFO [stderr] 
Dec 19 16:12:42.333 INFO [stderr] warning: method is never used: `distance_from_origin`
Dec 19 16:12:42.333 INFO [stderr]   --> src/generics/mod.rs:55:5
Dec 19 16:12:42.333 INFO [stderr]    |
Dec 19 16:12:42.333 INFO [stderr] 55 |     pub fn distance_from_origin(&self) -> f32 {
Dec 19 16:12:42.333 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:12:42.333 INFO [stderr] 
Dec 19 16:12:42.333 INFO [stderr] warning: function is never used: `notify_mult1`
Dec 19 16:12:42.333 INFO [stderr]   --> src/generics/mod.rs:70:1
Dec 19 16:12:42.333 INFO [stderr]    |
Dec 19 16:12:42.333 INFO [stderr] 70 | fn notify_mult1(item: impl Summary + Display) { // Placeholder
Dec 19 16:12:42.333 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:12:42.333 INFO [stderr] 
Dec 19 16:12:42.333 INFO [stderr] warning: function is never used: `notify_mult2`
Dec 19 16:12:42.333 INFO [stderr]   --> src/generics/mod.rs:73:1
Dec 19 16:12:42.333 INFO [stderr]    |
Dec 19 16:12:42.333 INFO [stderr] 73 | fn notify_mult2<T: Summary + Display>(item: T) {
Dec 19 16:12:42.333 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:12:42.333 INFO [stderr] 
Dec 19 16:12:42.333 INFO [stderr] warning: function is never used: `some_fn1`
Dec 19 16:12:42.333 INFO [stderr]   --> src/generics/mod.rs:77:1
Dec 19 16:12:42.333 INFO [stderr]    |
Dec 19 16:12:42.333 INFO [stderr] 77 | fn some_fn1<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {
Dec 19 16:12:42.333 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:12:42.333 INFO [stderr] 
Dec 19 16:12:42.333 INFO [stderr] warning: function is never used: `some_fn2`
Dec 19 16:12:42.333 INFO [stderr]   --> src/generics/mod.rs:82:1
Dec 19 16:12:42.333 INFO [stderr]    |
Dec 19 16:12:42.333 INFO [stderr] 82 | / fn some_fn2<T, U>(t: T, u: U) -> i32
Dec 19 16:12:42.333 INFO [stderr] 83 | |     where T: Display + Clone,
Dec 19 16:12:42.333 INFO [stderr] 84 | |           U: Clone + Debug
Dec 19 16:12:42.333 INFO [stderr] 85 | | {
Dec 19 16:12:42.333 INFO [stderr] 86 | |     // Placeholder
Dec 19 16:12:42.333 INFO [stderr] 87 | |     0
Dec 19 16:12:42.333 INFO [stderr] 88 | | }
Dec 19 16:12:42.333 INFO [stderr]    | |_^
Dec 19 16:12:42.333 INFO [stderr] 
Dec 19 16:12:42.333 INFO [stderr] warning: struct is never constructed: `NewsArticle`
Dec 19 16:12:42.333 INFO [stderr]    --> src/generics/mod.rs:106:1
Dec 19 16:12:42.333 INFO [stderr]     |
Dec 19 16:12:42.333 INFO [stderr] 106 | pub struct NewsArticle {
Dec 19 16:12:42.333 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:12:42.333 INFO [stderr] 
Dec 19 16:12:42.360 INFO [stderr] warning: field is never used: `y`
Dec 19 16:12:42.361 INFO [stderr]   --> src/generics/mod.rs:39:5
Dec 19 16:12:42.361 INFO [stderr]    |
Dec 19 16:12:42.361 INFO [stderr] 39 |     y: T,
Dec 19 16:12:42.361 INFO [stderr]    |     ^^^^
Dec 19 16:12:42.361 INFO [stderr]    |
Dec 19 16:12:42.361 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 16:12:42.361 INFO [stderr] 
Dec 19 16:12:42.361 INFO [stderr] warning: method is never used: `distance_from_origin`
Dec 19 16:12:42.361 INFO [stderr]   --> src/generics/mod.rs:55:5
Dec 19 16:12:42.361 INFO [stderr]    |
Dec 19 16:12:42.361 INFO [stderr] 55 |     pub fn distance_from_origin(&self) -> f32 {
Dec 19 16:12:42.361 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:12:42.362 INFO [stderr] 
Dec 19 16:12:42.362 INFO [stderr] warning: function is never used: `notify_mult1`
Dec 19 16:12:42.362 INFO [stderr]   --> src/generics/mod.rs:70:1
Dec 19 16:12:42.362 INFO [stderr]    |
Dec 19 16:12:42.362 INFO [stderr] 70 | fn notify_mult1(item: impl Summary + Display) { // Placeholder
Dec 19 16:12:42.362 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:12:42.362 INFO [stderr] 
Dec 19 16:12:42.362 INFO [stderr] warning: function is never used: `notify_mult2`
Dec 19 16:12:42.362 INFO [stderr]   --> src/generics/mod.rs:73:1
Dec 19 16:12:42.362 INFO [stderr]    |
Dec 19 16:12:42.362 INFO [stderr] 73 | fn notify_mult2<T: Summary + Display>(item: T) {
Dec 19 16:12:42.362 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:12:42.362 INFO [stderr] 
Dec 19 16:12:42.362 INFO [stderr] warning: function is never used: `some_fn1`
Dec 19 16:12:42.362 INFO [stderr]   --> src/generics/mod.rs:77:1
Dec 19 16:12:42.362 INFO [stderr]    |
Dec 19 16:12:42.362 INFO [stderr] 77 | fn some_fn1<T: Display + Clone, U: Clone + Debug>(t: T, u: U) -> i32 {
Dec 19 16:12:42.362 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:12:42.362 INFO [stderr] 
Dec 19 16:12:42.362 INFO [stderr] warning: function is never used: `some_fn2`
Dec 19 16:12:42.362 INFO [stderr]   --> src/generics/mod.rs:82:1
Dec 19 16:12:42.362 INFO [stderr]    |
Dec 19 16:12:42.362 INFO [stderr] 82 | / fn some_fn2<T, U>(t: T, u: U) -> i32
Dec 19 16:12:42.362 INFO [stderr] 83 | |     where T: Display + Clone,
Dec 19 16:12:42.362 INFO [stderr] 84 | |           U: Clone + Debug
Dec 19 16:12:42.362 INFO [stderr] 85 | | {
Dec 19 16:12:42.362 INFO [stderr] 86 | |     // Placeholder
Dec 19 16:12:42.362 INFO [stderr] 87 | |     0
Dec 19 16:12:42.362 INFO [stderr] 88 | | }
Dec 19 16:12:42.362 INFO [stderr]    | |_^
Dec 19 16:12:42.362 INFO [stderr] 
Dec 19 16:12:42.362 INFO [stderr] warning: struct is never constructed: `NewsArticle`
Dec 19 16:12:42.362 INFO [stderr]    --> src/generics/mod.rs:106:1
Dec 19 16:12:42.362 INFO [stderr]     |
Dec 19 16:12:42.362 INFO [stderr] 106 | pub struct NewsArticle {
Dec 19 16:12:42.362 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:12:42.362 INFO [stderr] 
Dec 19 16:12:42.394 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.36s
Dec 19 16:12:43.044 INFO running `"docker" "inspect" "2a77faa7fb08992898e185228d929f449c022aaa3822317b3bab04ba780ef13f"`
Dec 19 16:12:43.390 INFO running `"docker" "rm" "-f" "2a77faa7fb08992898e185228d929f449c022aaa3822317b3bab04ba780ef13f"`
Dec 19 16:12:43.692 INFO [stdout] 2a77faa7fb08992898e185228d929f449c022aaa3822317b3bab04ba780ef13f