Dec 19 19:19:32.345 INFO checking caporta/rust_fundamentals against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 19:19:32.345 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/caporta/rust_fundamentals:/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 19:19:32.510 INFO [stdout] 42b2064083e28804234238d80bf38e96f47fedaea8cffb0691585bf83e5c1a91
Dec 19 19:19:32.518 INFO running `"docker" "start" "-a" "42b2064083e28804234238d80bf38e96f47fedaea8cffb0691585bf83e5c1a91"`
Dec 19 19:19:33.119 INFO [stderr]     Checking hello_world v0.0.1 (/opt/crater/workdir)
Dec 19 19:19:33.216 INFO [stderr] warning: unknown lint: `unused_variable`
Dec 19 19:19:33.217 INFO [stderr]  --> src/stack_and_heap.rs:2:9
Dec 19 19:19:33.217 INFO [stderr]   |
Dec 19 19:19:33.217 INFO [stderr] 2 | #[allow(unused_variable)]
Dec 19 19:19:33.217 INFO [stderr]   |         ^^^^^^^^^^^^^^^
Dec 19 19:19:33.217 INFO [stderr]   |
Dec 19 19:19:33.217 INFO [stderr]   = note: #[warn(unknown_lints)] on by default
Dec 19 19:19:33.217 INFO [stderr] 
Dec 19 19:19:33.217 INFO [stderr] warning: unknown lint: `unused_variable`
Dec 19 19:19:33.217 INFO [stderr]  --> src/stack_and_heap.rs:2:9
Dec 19 19:19:33.217 INFO [stderr]   |
Dec 19 19:19:33.218 INFO [stderr] 2 | #[allow(unused_variable)]
Dec 19 19:19:33.218 INFO [stderr]   |         ^^^^^^^^^^^^^^^
Dec 19 19:19:33.218 INFO [stderr]   |
Dec 19 19:19:33.218 INFO [stderr]   = note: #[warn(unknown_lints)] on by default
Dec 19 19:19:33.218 INFO [stderr] 
Dec 19 19:19:33.604 INFO [stderr] warning: unused variable: `x`
Dec 19 19:19:33.604 INFO [stderr]   --> src/stack_and_heap.rs:15:9
Dec 19 19:19:33.604 INFO [stderr]    |
Dec 19 19:19:33.604 INFO [stderr] 15 |     let x = 5; // i32 stored on the stack
Dec 19 19:19:33.604 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 19 19:19:33.605 INFO [stderr]    |
Dec 19 19:19:33.605 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 19:19:33.605 INFO [stderr] 
Dec 19 19:19:33.605 INFO [stderr] warning: unused variable: `u`
Dec 19 19:19:33.605 INFO [stderr]   --> src/data_structures_2.rs:43:9
Dec 19 19:19:33.605 INFO [stderr]    |
Dec 19 19:19:33.605 INFO [stderr] 43 |     let u:&str = &letters; // d-ref conversions
Dec 19 19:19:33.605 INFO [stderr]    |         ^ help: consider using `_u` instead
Dec 19 19:19:33.605 INFO [stderr] 
Dec 19 19:19:33.605 INFO [stderr] warning: unused variable: `z`
Dec 19 19:19:33.605 INFO [stderr]  --> src/pattern_matching.rs:5:9
Dec 19 19:19:33.605 INFO [stderr]   |
Dec 19 19:19:33.605 INFO [stderr] 5 |         z @ 9...11 => "lots of", //assign range to variable
Dec 19 19:19:33.605 INFO [stderr]   |         ^ help: consider using `_z` instead
Dec 19 19:19:33.605 INFO [stderr] 
Dec 19 19:19:33.605 INFO [stderr] warning: unused variable: `myLine`
Dec 19 19:19:33.605 INFO [stderr]   --> src/generics.rs:17:9
Dec 19 19:19:33.605 INFO [stderr]    |
Dec 19 19:19:33.605 INFO [stderr] 17 |     let myLine = Line { start: a, end: b };
Dec 19 19:19:33.605 INFO [stderr]    |         ^^^^^^ help: consider using `_myLine` instead
Dec 19 19:19:33.605 INFO [stderr] 
Dec 19 19:19:33.627 INFO [stderr] warning: unused variable: `x`
Dec 19 19:19:33.628 INFO [stderr]   --> src/stack_and_heap.rs:15:9
Dec 19 19:19:33.628 INFO [stderr]    |
Dec 19 19:19:33.628 INFO [stderr] 15 |     let x = 5; // i32 stored on the stack
Dec 19 19:19:33.629 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 19 19:19:33.629 INFO [stderr]    |
Dec 19 19:19:33.629 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 19:19:33.629 INFO [stderr] 
Dec 19 19:19:33.630 INFO [stderr] warning: unused variable: `u`
Dec 19 19:19:33.630 INFO [stderr]   --> src/data_structures_2.rs:43:9
Dec 19 19:19:33.630 INFO [stderr]    |
Dec 19 19:19:33.630 INFO [stderr] 43 |     let u:&str = &letters; // d-ref conversions
Dec 19 19:19:33.631 INFO [stderr]    |         ^ help: consider using `_u` instead
Dec 19 19:19:33.631 INFO [stderr] 
Dec 19 19:19:33.631 INFO [stderr] warning: unused variable: `z`
Dec 19 19:19:33.632 INFO [stderr]  --> src/pattern_matching.rs:5:9
Dec 19 19:19:33.632 INFO [stderr]   |
Dec 19 19:19:33.632 INFO [stderr] 5 |         z @ 9...11 => "lots of", //assign range to variable
Dec 19 19:19:33.632 INFO [stderr]   |         ^ help: consider using `_z` instead
Dec 19 19:19:33.632 INFO [stderr] 
Dec 19 19:19:33.632 INFO [stderr] warning: unused variable: `myLine`
Dec 19 19:19:33.633 INFO [stderr]   --> src/generics.rs:17:9
Dec 19 19:19:33.633 INFO [stderr]    |
Dec 19 19:19:33.633 INFO [stderr] 17 |     let myLine = Line { start: a, end: b };
Dec 19 19:19:33.633 INFO [stderr]    |         ^^^^^^ help: consider using `_myLine` instead
Dec 19 19:19:33.633 INFO [stderr] 
Dec 19 19:19:33.681 INFO [stderr] warning: field is never used: `y`
Dec 19 19:19:33.681 INFO [stderr]  --> src/stack_and_heap.rs:7:5
Dec 19 19:19:33.681 INFO [stderr]   |
Dec 19 19:19:33.688 INFO [stderr] 7 |     y: f64
Dec 19 19:19:33.688 INFO [stderr]   |     ^^^^^^
Dec 19 19:19:33.688 INFO [stderr]   |
Dec 19 19:19:33.688 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 19:19:33.688 INFO [stderr] 
Dec 19 19:19:33.689 INFO [stderr] warning: variant is never constructed: `Red`
Dec 19 19:19:33.689 INFO [stderr]   --> src/data_structures_1.rs:28:5
Dec 19 19:19:33.689 INFO [stderr]    |
Dec 19 19:19:33.689 INFO [stderr] 28 |     Red, // "memberless struct"
Dec 19 19:19:33.689 INFO [stderr]    |     ^^^
Dec 19 19:19:33.690 INFO [stderr] 
Dec 19 19:19:33.690 INFO [stderr] warning: variant is never constructed: `Green`
Dec 19 19:19:33.690 INFO [stderr]   --> src/data_structures_1.rs:29:5
Dec 19 19:19:33.690 INFO [stderr]    |
Dec 19 19:19:33.691 INFO [stderr] 29 |     Green, // "memberless struct"
Dec 19 19:19:33.691 INFO [stderr]    |     ^^^^^
Dec 19 19:19:33.691 INFO [stderr] 
Dec 19 19:19:33.691 INFO [stderr] warning: variant is never constructed: `Blue`
Dec 19 19:19:33.692 INFO [stderr]   --> src/data_structures_1.rs:30:5
Dec 19 19:19:33.692 INFO [stderr]    |
Dec 19 19:19:33.692 INFO [stderr] 30 |     Blue, // etc...
Dec 19 19:19:33.692 INFO [stderr]    |     ^^^^
Dec 19 19:19:33.693 INFO [stderr] 
Dec 19 19:19:33.693 INFO [stderr] warning: variant is never constructed: `RGBColor`
Dec 19 19:19:33.693 INFO [stderr]   --> src/data_structures_1.rs:31:5
Dec 19 19:19:33.693 INFO [stderr]    |
Dec 19 19:19:33.694 INFO [stderr] 31 |     RGBColor(u8, u8, u8), // tuple
Dec 19 19:19:33.694 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
Dec 19 19:19:33.694 INFO [stderr] 
Dec 19 19:19:33.694 INFO [stderr] warning: field is never used: `cyan`
Dec 19 19:19:33.694 INFO [stderr]   --> src/data_structures_1.rs:32:15
Dec 19 19:19:33.694 INFO [stderr]    |
Dec 19 19:19:33.694 INFO [stderr] 32 |     CmykColor{cyan:u8, magenta:u8, yellow:u8, black:u8}, // struct
Dec 19 19:19:33.694 INFO [stderr]    |               ^^^^^^^
Dec 19 19:19:33.694 INFO [stderr] 
Dec 19 19:19:33.694 INFO [stderr] warning: field is never used: `magenta`
Dec 19 19:19:33.694 INFO [stderr]   --> src/data_structures_1.rs:32:24
Dec 19 19:19:33.695 INFO [stderr]    |
Dec 19 19:19:33.695 INFO [stderr] 32 |     CmykColor{cyan:u8, magenta:u8, yellow:u8, black:u8}, // struct
Dec 19 19:19:33.695 INFO [stderr]    |                        ^^^^^^^^^^
Dec 19 19:19:33.695 INFO [stderr] 
Dec 19 19:19:33.695 INFO [stderr] warning: field is never used: `yellow`
Dec 19 19:19:33.695 INFO [stderr]   --> src/data_structures_1.rs:32:36
Dec 19 19:19:33.695 INFO [stderr]    |
Dec 19 19:19:33.695 INFO [stderr] 32 |     CmykColor{cyan:u8, magenta:u8, yellow:u8, black:u8}, // struct
Dec 19 19:19:33.695 INFO [stderr]    |                                    ^^^^^^^^^
Dec 19 19:19:33.695 INFO [stderr] 
Dec 19 19:19:33.695 INFO [stderr] warning: field is never used: `start`
Dec 19 19:19:33.695 INFO [stderr]  --> src/generics.rs:7:5
Dec 19 19:19:33.695 INFO [stderr]   |
Dec 19 19:19:33.695 INFO [stderr] 7 |     start: Point<T>,
Dec 19 19:19:33.695 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 19 19:19:33.695 INFO [stderr] 
Dec 19 19:19:33.695 INFO [stderr] warning: field is never used: `end`
Dec 19 19:19:33.695 INFO [stderr]  --> src/generics.rs:8:5
Dec 19 19:19:33.695 INFO [stderr]   |
Dec 19 19:19:33.695 INFO [stderr] 8 |     end: Point<T>,
Dec 19 19:19:33.695 INFO [stderr]   |     ^^^^^^^^^^^^^
Dec 19 19:19:33.695 INFO [stderr] 
Dec 19 19:19:33.695 INFO [stderr] warning: variable `myLine` should have a snake case name such as `my_line`
Dec 19 19:19:33.695 INFO [stderr]   --> src/data_structures_1.rs:21:9
Dec 19 19:19:33.695 INFO [stderr]    |
Dec 19 19:19:33.695 INFO [stderr] 21 |     let myLine = Line { start: p, end: p2 };
Dec 19 19:19:33.695 INFO [stderr]    |         ^^^^^^
Dec 19 19:19:33.695 INFO [stderr]    |
Dec 19 19:19:33.695 INFO [stderr]    = note: #[warn(non_snake_case)] on by default
Dec 19 19:19:33.695 INFO [stderr] 
Dec 19 19:19:33.695 INFO [stderr] warning: variable `myLine` should have a snake case name such as `my_line`
Dec 19 19:19:33.695 INFO [stderr]   --> src/generics.rs:17:9
Dec 19 19:19:33.695 INFO [stderr]    |
Dec 19 19:19:33.695 INFO [stderr] 17 |     let myLine = Line { start: a, end: b };
Dec 19 19:19:33.695 INFO [stderr]    |         ^^^^^^
Dec 19 19:19:33.695 INFO [stderr] 
Dec 19 19:19:33.732 INFO [stderr] warning: field is never used: `y`
Dec 19 19:19:33.732 INFO [stderr]  --> src/stack_and_heap.rs:7:5
Dec 19 19:19:33.732 INFO [stderr]   |
Dec 19 19:19:33.732 INFO [stderr] 7 |     y: f64
Dec 19 19:19:33.733 INFO [stderr]   |     ^^^^^^
Dec 19 19:19:33.733 INFO [stderr]   |
Dec 19 19:19:33.733 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 19:19:33.733 INFO [stderr] 
Dec 19 19:19:33.733 INFO [stderr] warning: variant is never constructed: `Red`
Dec 19 19:19:33.733 INFO [stderr]   --> src/data_structures_1.rs:28:5
Dec 19 19:19:33.733 INFO [stderr]    |
Dec 19 19:19:33.733 INFO [stderr] 28 |     Red, // "memberless struct"
Dec 19 19:19:33.733 INFO [stderr]    |     ^^^
Dec 19 19:19:33.733 INFO [stderr] 
Dec 19 19:19:33.733 INFO [stderr] warning: variant is never constructed: `Green`
Dec 19 19:19:33.733 INFO [stderr]   --> src/data_structures_1.rs:29:5
Dec 19 19:19:33.733 INFO [stderr]    |
Dec 19 19:19:33.733 INFO [stderr] 29 |     Green, // "memberless struct"
Dec 19 19:19:33.733 INFO [stderr]    |     ^^^^^
Dec 19 19:19:33.733 INFO [stderr] 
Dec 19 19:19:33.733 INFO [stderr] warning: variant is never constructed: `Blue`
Dec 19 19:19:33.733 INFO [stderr]   --> src/data_structures_1.rs:30:5
Dec 19 19:19:33.733 INFO [stderr]    |
Dec 19 19:19:33.733 INFO [stderr] 30 |     Blue, // etc...
Dec 19 19:19:33.733 INFO [stderr]    |     ^^^^
Dec 19 19:19:33.733 INFO [stderr] 
Dec 19 19:19:33.733 INFO [stderr] warning: variant is never constructed: `RGBColor`
Dec 19 19:19:33.733 INFO [stderr]   --> src/data_structures_1.rs:31:5
Dec 19 19:19:33.733 INFO [stderr]    |
Dec 19 19:19:33.733 INFO [stderr] 31 |     RGBColor(u8, u8, u8), // tuple
Dec 19 19:19:33.733 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
Dec 19 19:19:33.733 INFO [stderr] 
Dec 19 19:19:33.733 INFO [stderr] warning: field is never used: `cyan`
Dec 19 19:19:33.733 INFO [stderr]   --> src/data_structures_1.rs:32:15
Dec 19 19:19:33.733 INFO [stderr]    |
Dec 19 19:19:33.733 INFO [stderr] 32 |     CmykColor{cyan:u8, magenta:u8, yellow:u8, black:u8}, // struct
Dec 19 19:19:33.733 INFO [stderr]    |               ^^^^^^^
Dec 19 19:19:33.733 INFO [stderr] 
Dec 19 19:19:33.733 INFO [stderr] warning: field is never used: `magenta`
Dec 19 19:19:33.733 INFO [stderr]   --> src/data_structures_1.rs:32:24
Dec 19 19:19:33.733 INFO [stderr]    |
Dec 19 19:19:33.733 INFO [stderr] 32 |     CmykColor{cyan:u8, magenta:u8, yellow:u8, black:u8}, // struct
Dec 19 19:19:33.733 INFO [stderr]    |                        ^^^^^^^^^^
Dec 19 19:19:33.733 INFO [stderr] 
Dec 19 19:19:33.733 INFO [stderr] warning: field is never used: `yellow`
Dec 19 19:19:33.733 INFO [stderr]   --> src/data_structures_1.rs:32:36
Dec 19 19:19:33.733 INFO [stderr]    |
Dec 19 19:19:33.733 INFO [stderr] 32 |     CmykColor{cyan:u8, magenta:u8, yellow:u8, black:u8}, // struct
Dec 19 19:19:33.733 INFO [stderr]    |                                    ^^^^^^^^^
Dec 19 19:19:33.733 INFO [stderr] 
Dec 19 19:19:33.733 INFO [stderr] warning: field is never used: `start`
Dec 19 19:19:33.733 INFO [stderr]  --> src/generics.rs:7:5
Dec 19 19:19:33.733 INFO [stderr]   |
Dec 19 19:19:33.733 INFO [stderr] 7 |     start: Point<T>,
Dec 19 19:19:33.733 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 19 19:19:33.733 INFO [stderr] 
Dec 19 19:19:33.733 INFO [stderr] warning: field is never used: `end`
Dec 19 19:19:33.733 INFO [stderr]  --> src/generics.rs:8:5
Dec 19 19:19:33.733 INFO [stderr]   |
Dec 19 19:19:33.733 INFO [stderr] 8 |     end: Point<T>,
Dec 19 19:19:33.733 INFO [stderr]   |     ^^^^^^^^^^^^^
Dec 19 19:19:33.733 INFO [stderr] 
Dec 19 19:19:33.733 INFO [stderr] warning: variable `myLine` should have a snake case name such as `my_line`
Dec 19 19:19:33.733 INFO [stderr]   --> src/data_structures_1.rs:21:9
Dec 19 19:19:33.733 INFO [stderr]    |
Dec 19 19:19:33.733 INFO [stderr] 21 |     let myLine = Line { start: p, end: p2 };
Dec 19 19:19:33.733 INFO [stderr]    |         ^^^^^^
Dec 19 19:19:33.733 INFO [stderr]    |
Dec 19 19:19:33.733 INFO [stderr]    = note: #[warn(non_snake_case)] on by default
Dec 19 19:19:33.733 INFO [stderr] 
Dec 19 19:19:33.733 INFO [stderr] warning: variable `myLine` should have a snake case name such as `my_line`
Dec 19 19:19:33.733 INFO [stderr]   --> src/generics.rs:17:9
Dec 19 19:19:33.733 INFO [stderr]    |
Dec 19 19:19:33.733 INFO [stderr] 17 |     let myLine = Line { start: a, end: b };
Dec 19 19:19:33.733 INFO [stderr]    |         ^^^^^^
Dec 19 19:19:33.733 INFO [stderr] 
Dec 19 19:19:33.748 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
Dec 19 19:19:34.142 INFO running `"docker" "inspect" "42b2064083e28804234238d80bf38e96f47fedaea8cffb0691585bf83e5c1a91"`
Dec 19 19:19:34.280 INFO running `"docker" "rm" "-f" "42b2064083e28804234238d80bf38e96f47fedaea8cffb0691585bf83e5c1a91"`
Dec 19 19:19:34.412 INFO [stdout] 42b2064083e28804234238d80bf38e96f47fedaea8cffb0691585bf83e5c1a91