[INFO] updating cached repository kanishkd4/Rust-by-example
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/kanishkd4/Rust-by-example
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/kanishkd4/Rust-by-example" "work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/kanishkd4/Rust-by-example"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/kanishkd4/Rust-by-example'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/kanishkd4/Rust-by-example" "work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/kanishkd4/Rust-by-example"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/kanishkd4/Rust-by-example'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a2b88db631e7cfa65de6b348419da65cb5c3b8c7
[INFO] sha for GitHub repo kanishkd4/Rust-by-example: a2b88db631e7cfa65de6b348419da65cb5c3b8c7
[INFO] validating manifest of kanishkd4/Rust-by-example on toolchain master#a850a426491e14186af2250549bf41256b5938d2
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of kanishkd4/Rust-by-example on toolchain try#06a150c7d11500b41499224f165e9de1de096768
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing kanishkd4/Rust-by-example
[INFO] finished frobbing kanishkd4/Rust-by-example
[INFO] frobbed toml for kanishkd4/Rust-by-example written to work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/kanishkd4/Rust-by-example/Cargo.toml
[INFO] started frobbing kanishkd4/Rust-by-example
[INFO] finished frobbing kanishkd4/Rust-by-example
[INFO] frobbed toml for kanishkd4/Rust-by-example written to work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/kanishkd4/Rust-by-example/Cargo.toml
[INFO] crate kanishkd4/Rust-by-example already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking kanishkd4/Rust-by-example against master#a850a426491e14186af2250549bf41256b5938d2 for pr-60162
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60162/worker-4/master#a850a426491e14186af2250549bf41256b5938d2:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/kanishkd4/Rust-by-example:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+a850a426491e14186af2250549bf41256b5938d2-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] db3e24fa0b9cd1871726561208c289652fbc27d557984921df7a583113c5cb45
[INFO] running `"docker" "start" "-a" "db3e24fa0b9cd1871726561208c289652fbc27d557984921df7a583113c5cb45"`
[INFO] [stderr]     Checking rust-by-example v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: type `u64_t` should have an upper camel case name
[INFO] [stderr]   --> src/bin/c5_types.rs:14:6
[INFO] [stderr]    |
[INFO] [stderr] 14 | type u64_t = u64;
[INFO] [stderr]    |      ^^^^^ help: convert the identifier to upper camel case: `U64T`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_camel_case_types)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `s` should have an upper camel case name
[INFO] [stderr]   --> src/bin/c14_generics_bounds_where.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 | struct s<T: Display>(T); // S can only be a type that implements the Display trait - so no vectors
[INFO] [stderr]    |        ^ help: convert the identifier to upper camel case: `S`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_camel_case_types)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `u64_t`
[INFO] [stderr]   --> src/bin/c5_types.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | type u64_t = u64;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Food` should have a snake case name
[INFO] [stderr]   --> src/bin/c18_error_option_unwrap.rs:81:21
[INFO] [stderr]    |
[INFO] [stderr] 81 |         Some(Peeled(Food)) => Some(Chopped(Food)),
[INFO] [stderr]    |                     ^^^^ help: convert the identifier to snake case: `food`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Food` should have a snake case name
[INFO] [stderr]   --> src/bin/c18_error_option_unwrap.rs:87:26
[INFO] [stderr]    |
[INFO] [stderr] 87 |     chopped.map(|Chopped(Food)| Cooked(Food))
[INFO] [stderr]    |                          ^^^^ help: convert the identifier to snake case: `food`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `printer`
[INFO] [stderr]  --> src/bin/c14_generics_bounds_where.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn printer<T: Display>(t: T) {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `s`
[INFO] [stderr]   --> src/bin/c14_generics_bounds_where.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | struct s<T: Display>(T); // S can only be a type that implements the Display trait - so no vectors
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `foo`
[INFO] [stderr]  --> src/bin/c14_generics_functions_impl_traits.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | fn foo<T>(_arg: T) {} // becuase T has been specified as a generic type parameter using <T>, 
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `S`
[INFO] [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:48:1
[INFO] [stderr]    |
[INFO] [stderr] 48 | struct S(A); // concrete type S that takes concrete type A defined above // commented for struct S below
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `SGen`
[INFO] [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:49:1
[INFO] [stderr]    |
[INFO] [stderr] 49 | struct SGen<T>(T); // Generic type SGen
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reg_fn`
[INFO] [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:51:1
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn reg_fn(_s: S) {} // a regular function that takes an argument of type S - not a generic function
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gen_spec_t`
[INFO] [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:53:1
[INFO] [stderr]    |
[INFO] [stderr] 53 | fn gen_spec_t(_s: SGen<A>) {} // this is also not a generic as SGen has been given the type A
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gen_spec_i32`
[INFO] [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:54:1
[INFO] [stderr]    |
[INFO] [stderr] 54 | fn gen_spec_i32(_s: SGen<i32>) {} // this is also not a generic
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `generic`
[INFO] [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:55:1
[INFO] [stderr]    |
[INFO] [stderr] 55 | fn generic<T>(_s: SGen<T>) {} // a generic function
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `S1`
[INFO] [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:59:1
[INFO] [stderr]    |
[INFO] [stderr] 59 | struct S1; // concrete type S
[INFO] [stderr]    | ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `GenericVal`
[INFO] [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:60:1
[INFO] [stderr]    |
[INFO] [stderr] 60 | struct GenericVal<T>(T, ); // Generic type GenericVal
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `p1`
[INFO] [stderr]   --> src/bin/c3_custom_types_structs.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     p1: Point,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `p2`
[INFO] [stderr]   --> src/bin/c3_custom_types_structs.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     p2: Point,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::iter`
[INFO] [stderr]   --> src/bin/c17_macro_dry_dsl_variadics.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |     use std::iter;
[INFO] [stderr]    |         ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `add_assign`
[INFO] [stderr]   --> src/bin/c17_macro_dry_dsl_variadics.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |         fn $func<T: $bound<T, Output=T> + Copy>(xs: &mut Vec<T>, ys: &Vec<T>) {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 32 | op!(add_assign, Add, +=, add);
[INFO] [stderr]    | ------------------------------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `mul_assign`
[INFO] [stderr]   --> src/bin/c17_macro_dry_dsl_variadics.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |         fn $func<T: $bound<T, Output=T> + Copy>(xs: &mut Vec<T>, ys: &Vec<T>) {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 33 | op!(mul_assign, Mul, *=, mul);
[INFO] [stderr]    | ------------------------------ in this macro invocation
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sub_assign`
[INFO] [stderr]   --> src/bin/c17_macro_dry_dsl_variadics.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |         fn $func<T: $bound<T, Output=T> + Copy>(xs: &mut Vec<T>, ys: &Vec<T>) {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 34 | op!(sub_assign, Sub, -=, sub);  
[INFO] [stderr]    | ------------------------------ in this macro invocation
[INFO] [stderr] 
[INFO] [stderr] warning: type `web_event` should have an upper camel case name
[INFO] [stderr]  --> src/bin/c3_custom_types_enums1.rs:6:6
[INFO] [stderr]   |
[INFO] [stderr] 6 | enum web_event {
[INFO] [stderr]   |      ^^^^^^^^^ help: convert the identifier to upper camel case: `WebEvent`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_camel_case_types)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant `page_load` should have an upper camel case name
[INFO] [stderr]  --> src/bin/c3_custom_types_enums1.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     page_load,
[INFO] [stderr]   |     ^^^^^^^^^ help: convert the identifier to upper camel case: `PageLoad`
[INFO] [stderr] 
[INFO] [stderr] warning: variant `page_unload` should have an upper camel case name
[INFO] [stderr]  --> src/bin/c3_custom_types_enums1.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     page_unload,
[INFO] [stderr]   |     ^^^^^^^^^^^ help: convert the identifier to upper camel case: `PageUnload`
[INFO] [stderr] 
[INFO] [stderr] warning: variant `key_press` should have an upper camel case name
[INFO] [stderr]   --> src/bin/c3_custom_types_enums1.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     key_press(char),
[INFO] [stderr]    |     ^^^^^^^^^ help: convert the identifier to upper camel case: `KeyPress`
[INFO] [stderr] 
[INFO] [stderr] warning: variant `paste` should have an upper camel case name
[INFO] [stderr]   --> src/bin/c3_custom_types_enums1.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     paste(String),
[INFO] [stderr]    |     ^^^^^ help: convert the identifier to upper camel case: `Paste`
[INFO] [stderr] 
[INFO] [stderr] warning: variant `click` should have an upper camel case name
[INFO] [stderr]   --> src/bin/c3_custom_types_enums1.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     click { x: i64, y: i64 },
[INFO] [stderr]    |     ^^^^^ help: convert the identifier to upper camel case: `Click`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `foo`
[INFO] [stderr]   --> src/bin/c9_higher_order_diverging_functions.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn foo() -> ! {
[INFO] [stderr]    | ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `web_event` should have an upper camel case name
[INFO] [stderr]  --> src/bin/c3_custom_types_enums1.rs:6:6
[INFO] [stderr]   |
[INFO] [stderr] 6 | enum web_event {
[INFO] [stderr]   |      ^^^^^^^^^ help: convert the identifier to upper camel case: `WebEvent`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_camel_case_types)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant `page_load` should have an upper camel case name
[INFO] [stderr]  --> src/bin/c3_custom_types_enums1.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     page_load,
[INFO] [stderr]   |     ^^^^^^^^^ help: convert the identifier to upper camel case: `PageLoad`
[INFO] [stderr] 
[INFO] [stderr] warning: variant `page_unload` should have an upper camel case name
[INFO] [stderr]  --> src/bin/c3_custom_types_enums1.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     page_unload,
[INFO] [stderr]   |     ^^^^^^^^^^^ help: convert the identifier to upper camel case: `PageUnload`
[INFO] [stderr] 
[INFO] [stderr] warning: variant `key_press` should have an upper camel case name
[INFO] [stderr]   --> src/bin/c3_custom_types_enums1.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     key_press(char),
[INFO] [stderr]    |     ^^^^^^^^^ help: convert the identifier to upper camel case: `KeyPress`
[INFO] [stderr] 
[INFO] [stderr] warning: variant `paste` should have an upper camel case name
[INFO] [stderr]   --> src/bin/c3_custom_types_enums1.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     paste(String),
[INFO] [stderr]    |     ^^^^^ help: convert the identifier to upper camel case: `Paste`
[INFO] [stderr] 
[INFO] [stderr] warning: variant `click` should have an upper camel case name
[INFO] [stderr]   --> src/bin/c3_custom_types_enums1.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     click { x: i64, y: i64 },
[INFO] [stderr]    |     ^^^^^ help: convert the identifier to upper camel case: `Click`
[INFO] [stderr] 
[INFO] [stderr] warning: type `s` should have an upper camel case name
[INFO] [stderr]   --> src/bin/c14_generics_bounds_where.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 | struct s<T: Display>(T); // S can only be a type that implements the Display trait - so no vectors
[INFO] [stderr]    |        ^ help: convert the identifier to upper camel case: `S`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_camel_case_types)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Matrix`
[INFO] [stderr]   --> src/bin/c2_primitives.rs:94:1
[INFO] [stderr]    |
[INFO] [stderr] 94 | struct Matrix(f32, f32, f32, f32);
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Deep`
[INFO] [stderr]   --> src/bin/c1_formatted_print.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | struct Deep(Structure);
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `printer`
[INFO] [stderr]  --> src/bin/c14_generics_bounds_where.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn printer<T: Display>(t: T) {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `s`
[INFO] [stderr]   --> src/bin/c14_generics_bounds_where.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | struct s<T: Display>(T); // S can only be a type that implements the Display trait - so no vectors
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `p1`
[INFO] [stderr]   --> src/bin/c3_custom_types_structs.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     p1: Point,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `p2`
[INFO] [stderr]   --> src/bin/c3_custom_types_structs.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     p2: Point,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `foo`
[INFO] [stderr]  --> src/bin/c14_generics_functions_impl_traits.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | fn foo<T>(_arg: T) {} // becuase T has been specified as a generic type parameter using <T>, 
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `S`
[INFO] [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:48:1
[INFO] [stderr]    |
[INFO] [stderr] 48 | struct S(A); // concrete type S that takes concrete type A defined above // commented for struct S below
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `SGen`
[INFO] [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:49:1
[INFO] [stderr]    |
[INFO] [stderr] 49 | struct SGen<T>(T); // Generic type SGen
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reg_fn`
[INFO] [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:51:1
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn reg_fn(_s: S) {} // a regular function that takes an argument of type S - not a generic function
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gen_spec_t`
[INFO] [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:53:1
[INFO] [stderr]    |
[INFO] [stderr] 53 | fn gen_spec_t(_s: SGen<A>) {} // this is also not a generic as SGen has been given the type A
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gen_spec_i32`
[INFO] [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:54:1
[INFO] [stderr]    |
[INFO] [stderr] 54 | fn gen_spec_i32(_s: SGen<i32>) {} // this is also not a generic
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `generic`
[INFO] [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:55:1
[INFO] [stderr]    |
[INFO] [stderr] 55 | fn generic<T>(_s: SGen<T>) {} // a generic function
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `S1`
[INFO] [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:59:1
[INFO] [stderr]    |
[INFO] [stderr] 59 | struct S1; // concrete type S
[INFO] [stderr]    | ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `GenericVal`
[INFO] [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:60:1
[INFO] [stderr]    |
[INFO] [stderr] 60 | struct GenericVal<T>(T, ); // Generic type GenericVal
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Matrix`
[INFO] [stderr]   --> src/bin/c2_primitives.rs:94:1
[INFO] [stderr]    |
[INFO] [stderr] 94 | struct Matrix(f32, f32, f32, f32);
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Deep`
[INFO] [stderr]   --> src/bin/c1_formatted_print.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | struct Deep(Structure);
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `u64_t` should have an upper camel case name
[INFO] [stderr]   --> src/bin/c5_types.rs:14:6
[INFO] [stderr]    |
[INFO] [stderr] 14 | type u64_t = u64;
[INFO] [stderr]    |      ^^^^^ help: convert the identifier to upper camel case: `U64T`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_camel_case_types)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `u64_t`
[INFO] [stderr]   --> src/bin/c5_types.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | type u64_t = u64;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `foo`
[INFO] [stderr]   --> src/bin/c9_higher_order_diverging_functions.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn foo() -> ! {
[INFO] [stderr]    | ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Food` should have a snake case name
[INFO] [stderr]   --> src/bin/c18_error_option_unwrap.rs:81:21
[INFO] [stderr]    |
[INFO] [stderr] 81 |         Some(Peeled(Food)) => Some(Chopped(Food)),
[INFO] [stderr]    |                     ^^^^ help: convert the identifier to snake case: `food`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Food` should have a snake case name
[INFO] [stderr]   --> src/bin/c18_error_option_unwrap.rs:87:26
[INFO] [stderr]    |
[INFO] [stderr] 87 |     chopped.map(|Chopped(Food)| Cooked(Food))
[INFO] [stderr]    |                          ^^^^ help: convert the identifier to snake case: `food`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.04s
[INFO] running `"docker" "inspect" "db3e24fa0b9cd1871726561208c289652fbc27d557984921df7a583113c5cb45"`
[INFO] running `"docker" "rm" "-f" "db3e24fa0b9cd1871726561208c289652fbc27d557984921df7a583113c5cb45"`
[INFO] [stdout] db3e24fa0b9cd1871726561208c289652fbc27d557984921df7a583113c5cb45