Dec 17 21:45:51.256 INFO checking kanishkd4/Rust-by-example against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 21:45:51.256 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/kanishkd4/Rust-by-example:/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 21:45:51.485 INFO [stdout] c16238984541b756b42b5f5d7017bc5d489e634a42e5978f50af4c2b8aaaea6b
Dec 17 21:45:51.488 INFO running `"docker" "start" "-a" "c16238984541b756b42b5f5d7017bc5d489e634a42e5978f50af4c2b8aaaea6b"`
Dec 17 21:45:52.428 INFO [stderr]     Checking rust-by-example v0.1.0 (/opt/crater/workdir)
Dec 17 21:45:52.851 INFO [stderr] warning: function is never used: `foo`
Dec 17 21:45:52.852 INFO [stderr]  --> src/bin/c14_generics_functions_impl_traits.rs:8:1
Dec 17 21:45:52.852 INFO [stderr]   |
Dec 17 21:45:52.852 INFO [stderr] 8 | fn foo<T>(_arg: T) {} // becuase T has been specified as a generic type parameter using <T>, 
Dec 17 21:45:52.853 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^
Dec 17 21:45:52.853 INFO [stderr]   |
Dec 17 21:45:52.853 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 17 21:45:52.853 INFO [stderr] 
Dec 17 21:45:52.854 INFO [stderr] warning: struct is never constructed: `S`
Dec 17 21:45:52.854 INFO [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:48:1
Dec 17 21:45:52.854 INFO [stderr]    |
Dec 17 21:45:52.854 INFO [stderr] 48 | struct S(A); // concrete type S that takes concrete type A defined above // commented for struct S below
Dec 17 21:45:52.855 INFO [stderr]    | ^^^^^^^^^^^^
Dec 17 21:45:52.855 INFO [stderr] 
Dec 17 21:45:52.855 INFO [stderr] warning: struct is never constructed: `SGen`
Dec 17 21:45:52.855 INFO [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:49:1
Dec 17 21:45:52.856 INFO [stderr]    |
Dec 17 21:45:52.856 INFO [stderr] 49 | struct SGen<T>(T); // Generic type SGen
Dec 17 21:45:52.856 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^
Dec 17 21:45:52.856 INFO [stderr] 
Dec 17 21:45:52.857 INFO [stderr] warning: function is never used: `reg_fn`
Dec 17 21:45:52.857 INFO [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:51:1
Dec 17 21:45:52.857 INFO [stderr]    |
Dec 17 21:45:52.858 INFO [stderr] 51 | fn reg_fn(_s: S) {} // a regular function that takes an argument of type S - not a generic function
Dec 17 21:45:52.858 INFO [stderr]    | ^^^^^^^^^^^^^^^^
Dec 17 21:45:52.858 INFO [stderr] 
Dec 17 21:45:52.858 INFO [stderr] warning: function is never used: `gen_spec_t`
Dec 17 21:45:52.859 INFO [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:53:1
Dec 17 21:45:52.859 INFO [stderr]    |
Dec 17 21:45:52.859 INFO [stderr] 53 | fn gen_spec_t(_s: SGen<A>) {} // this is also not a generic as SGen has been given the type A
Dec 17 21:45:52.859 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:52.864 INFO [stderr] 
Dec 17 21:45:52.864 INFO [stderr] warning: function is never used: `gen_spec_i32`
Dec 17 21:45:52.864 INFO [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:54:1
Dec 17 21:45:52.864 INFO [stderr]    |
Dec 17 21:45:52.864 INFO [stderr] 54 | fn gen_spec_i32(_s: SGen<i32>) {} // this is also not a generic
Dec 17 21:45:52.864 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:52.864 INFO [stderr] 
Dec 17 21:45:52.864 INFO [stderr] warning: function is never used: `generic`
Dec 17 21:45:52.864 INFO [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:55:1
Dec 17 21:45:52.864 INFO [stderr]    |
Dec 17 21:45:52.864 INFO [stderr] 55 | fn generic<T>(_s: SGen<T>) {} // a generic function
Dec 17 21:45:52.864 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:52.864 INFO [stderr] 
Dec 17 21:45:52.864 INFO [stderr] warning: struct is never constructed: `S1`
Dec 17 21:45:52.864 INFO [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:59:1
Dec 17 21:45:52.864 INFO [stderr]    |
Dec 17 21:45:52.864 INFO [stderr] 59 | struct S1; // concrete type S
Dec 17 21:45:52.864 INFO [stderr]    | ^^^^^^^^^^
Dec 17 21:45:52.864 INFO [stderr] 
Dec 17 21:45:52.864 INFO [stderr] warning: struct is never constructed: `GenericVal`
Dec 17 21:45:52.864 INFO [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:60:1
Dec 17 21:45:52.864 INFO [stderr]    |
Dec 17 21:45:52.864 INFO [stderr] 60 | struct GenericVal<T>(T, ); // Generic type GenericVal
Dec 17 21:45:52.864 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:52.864 INFO [stderr] 
Dec 17 21:45:53.232 INFO [stderr] warning: type alias is never used: `u64_t`
Dec 17 21:45:53.232 INFO [stderr]   --> src/bin/c5_types.rs:14:1
Dec 17 21:45:53.232 INFO [stderr]    |
Dec 17 21:45:53.232 INFO [stderr] 14 | type u64_t = u64;
Dec 17 21:45:53.232 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 17 21:45:53.232 INFO [stderr]    |
Dec 17 21:45:53.232 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 21:45:53.232 INFO [stderr] 
Dec 17 21:45:53.232 INFO [stderr] warning: type `u64_t` should have a camel case name such as `U64T`
Dec 17 21:45:53.232 INFO [stderr]   --> src/bin/c5_types.rs:14:1
Dec 17 21:45:53.232 INFO [stderr]    |
Dec 17 21:45:53.232 INFO [stderr] 14 | type u64_t = u64;
Dec 17 21:45:53.232 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 17 21:45:53.232 INFO [stderr]    |
Dec 17 21:45:53.232 INFO [stderr]    = note: #[warn(non_camel_case_types)] on by default
Dec 17 21:45:53.232 INFO [stderr] 
Dec 17 21:45:54.116 INFO [stderr] warning: struct is never constructed: `Deep`
Dec 17 21:45:54.116 INFO [stderr]   --> src/bin/c1_formatted_print.rs:34:1
Dec 17 21:45:54.116 INFO [stderr]    |
Dec 17 21:45:54.116 INFO [stderr] 34 | struct Deep(Structure);
Dec 17 21:45:54.116 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:54.116 INFO [stderr]    |
Dec 17 21:45:54.116 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 21:45:54.116 INFO [stderr] 
Dec 17 21:45:54.136 INFO [stderr] warning: struct is never constructed: `Matrix`
Dec 17 21:45:54.136 INFO [stderr]   --> src/bin/c2_primitives.rs:94:1
Dec 17 21:45:54.136 INFO [stderr]    |
Dec 17 21:45:54.136 INFO [stderr] 94 | struct Matrix(f32, f32, f32, f32);
Dec 17 21:45:54.136 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:54.136 INFO [stderr]    |
Dec 17 21:45:54.136 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 21:45:54.136 INFO [stderr] 
Dec 17 21:45:54.136 INFO [stderr] warning: type `web_event` should have a camel case name such as `WebEvent`
Dec 17 21:45:54.136 INFO [stderr]   --> src/bin/c3_custom_types_enums1.rs:6:1
Dec 17 21:45:54.136 INFO [stderr]    |
Dec 17 21:45:54.136 INFO [stderr] 6  | / enum web_event {
Dec 17 21:45:54.136 INFO [stderr] 7  | |     // an enum can be unit like
Dec 17 21:45:54.136 INFO [stderr] 8  | |     page_load,
Dec 17 21:45:54.136 INFO [stderr] 9  | |     page_unload,
Dec 17 21:45:54.136 INFO [stderr] ...  |
Dec 17 21:45:54.136 INFO [stderr] 14 | |     click { x: i64, y: i64 },
Dec 17 21:45:54.136 INFO [stderr] 15 | | }
Dec 17 21:45:54.136 INFO [stderr]    | |_^
Dec 17 21:45:54.136 INFO [stderr]    |
Dec 17 21:45:54.136 INFO [stderr]    = note: #[warn(non_camel_case_types)] on by default
Dec 17 21:45:54.136 INFO [stderr] 
Dec 17 21:45:54.136 INFO [stderr] warning: variant `page_load` should have a camel case name such as `PageLoad`
Dec 17 21:45:54.136 INFO [stderr]  --> src/bin/c3_custom_types_enums1.rs:8:5
Dec 17 21:45:54.136 INFO [stderr]   |
Dec 17 21:45:54.136 INFO [stderr] 8 |     page_load,
Dec 17 21:45:54.136 INFO [stderr]   |     ^^^^^^^^^
Dec 17 21:45:54.136 INFO [stderr] 
Dec 17 21:45:54.140 INFO [stderr] warning: variant `page_unload` should have a camel case name such as `PageUnload`
Dec 17 21:45:54.140 INFO [stderr]  --> src/bin/c3_custom_types_enums1.rs:9:5
Dec 17 21:45:54.140 INFO [stderr]   |
Dec 17 21:45:54.140 INFO [stderr] 9 |     page_unload,
Dec 17 21:45:54.140 INFO [stderr]   |     ^^^^^^^^^^^
Dec 17 21:45:54.140 INFO [stderr] 
Dec 17 21:45:54.140 INFO [stderr] warning: variant `key_press` should have a camel case name such as `KeyPress`
Dec 17 21:45:54.140 INFO [stderr]   --> src/bin/c3_custom_types_enums1.rs:11:5
Dec 17 21:45:54.140 INFO [stderr]    |
Dec 17 21:45:54.140 INFO [stderr] 11 |     key_press(char),
Dec 17 21:45:54.140 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 17 21:45:54.140 INFO [stderr] 
Dec 17 21:45:54.140 INFO [stderr] warning: variant `paste` should have a camel case name such as `Paste`
Dec 17 21:45:54.140 INFO [stderr]   --> src/bin/c3_custom_types_enums1.rs:12:5
Dec 17 21:45:54.140 INFO [stderr]    |
Dec 17 21:45:54.140 INFO [stderr] 12 |     paste(String),
Dec 17 21:45:54.140 INFO [stderr]    |     ^^^^^^^^^^^^^
Dec 17 21:45:54.140 INFO [stderr] 
Dec 17 21:45:54.140 INFO [stderr] warning: variant `click` should have a camel case name such as `Click`
Dec 17 21:45:54.140 INFO [stderr]   --> src/bin/c3_custom_types_enums1.rs:14:5
Dec 17 21:45:54.140 INFO [stderr]    |
Dec 17 21:45:54.140 INFO [stderr] 14 |     click { x: i64, y: i64 },
Dec 17 21:45:54.140 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:54.140 INFO [stderr] 
Dec 17 21:45:54.142 INFO [stderr] warning: type `web_event` should have a camel case name such as `WebEvent`
Dec 17 21:45:54.142 INFO [stderr]   --> src/bin/c3_custom_types_enums1.rs:6:1
Dec 17 21:45:54.142 INFO [stderr]    |
Dec 17 21:45:54.142 INFO [stderr] 6  | / enum web_event {
Dec 17 21:45:54.142 INFO [stderr] 7  | |     // an enum can be unit like
Dec 17 21:45:54.142 INFO [stderr] 8  | |     page_load,
Dec 17 21:45:54.142 INFO [stderr] 9  | |     page_unload,
Dec 17 21:45:54.142 INFO [stderr] ...  |
Dec 17 21:45:54.142 INFO [stderr] 14 | |     click { x: i64, y: i64 },
Dec 17 21:45:54.142 INFO [stderr] 15 | | }
Dec 17 21:45:54.142 INFO [stderr]    | |_^
Dec 17 21:45:54.142 INFO [stderr]    |
Dec 17 21:45:54.142 INFO [stderr]    = note: #[warn(non_camel_case_types)] on by default
Dec 17 21:45:54.142 INFO [stderr] 
Dec 17 21:45:54.143 INFO [stderr] warning: variant `page_load` should have a camel case name such as `PageLoad`
Dec 17 21:45:54.143 INFO [stderr]  --> src/bin/c3_custom_types_enums1.rs:8:5
Dec 17 21:45:54.143 INFO [stderr]   |
Dec 17 21:45:54.143 INFO [stderr] 8 |     page_load,
Dec 17 21:45:54.143 INFO [stderr]   |     ^^^^^^^^^
Dec 17 21:45:54.143 INFO [stderr] 
Dec 17 21:45:54.143 INFO [stderr] warning: variant `page_unload` should have a camel case name such as `PageUnload`
Dec 17 21:45:54.143 INFO [stderr]  --> src/bin/c3_custom_types_enums1.rs:9:5
Dec 17 21:45:54.143 INFO [stderr]   |
Dec 17 21:45:54.143 INFO [stderr] 9 |     page_unload,
Dec 17 21:45:54.143 INFO [stderr]   |     ^^^^^^^^^^^
Dec 17 21:45:54.143 INFO [stderr] 
Dec 17 21:45:54.143 INFO [stderr] warning: variant `key_press` should have a camel case name such as `KeyPress`
Dec 17 21:45:54.143 INFO [stderr]   --> src/bin/c3_custom_types_enums1.rs:11:5
Dec 17 21:45:54.144 INFO [stderr]    |
Dec 17 21:45:54.144 INFO [stderr] 11 |     key_press(char),
Dec 17 21:45:54.144 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 17 21:45:54.144 INFO [stderr] 
Dec 17 21:45:54.144 INFO [stderr] warning: variant `paste` should have a camel case name such as `Paste`
Dec 17 21:45:54.144 INFO [stderr]   --> src/bin/c3_custom_types_enums1.rs:12:5
Dec 17 21:45:54.144 INFO [stderr]    |
Dec 17 21:45:54.144 INFO [stderr] 12 |     paste(String),
Dec 17 21:45:54.144 INFO [stderr]    |     ^^^^^^^^^^^^^
Dec 17 21:45:54.144 INFO [stderr] 
Dec 17 21:45:54.149 INFO [stderr] warning: variant `click` should have a camel case name such as `Click`
Dec 17 21:45:54.149 INFO [stderr]   --> src/bin/c3_custom_types_enums1.rs:14:5
Dec 17 21:45:54.149 INFO [stderr]    |
Dec 17 21:45:54.149 INFO [stderr] 14 |     click { x: i64, y: i64 },
Dec 17 21:45:54.149 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:54.149 INFO [stderr] 
Dec 17 21:45:54.692 INFO [stderr] warning: unused import: `std::iter`
Dec 17 21:45:54.692 INFO [stderr]   --> src/bin/c17_macro_dry_dsl_variadics.rs:37:9
Dec 17 21:45:54.692 INFO [stderr]    |
Dec 17 21:45:54.692 INFO [stderr] 37 |     use std::iter;
Dec 17 21:45:54.692 INFO [stderr]    |         ^^^^^^^^^
Dec 17 21:45:54.692 INFO [stderr]    |
Dec 17 21:45:54.692 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 17 21:45:54.692 INFO [stderr] 
Dec 17 21:45:54.788 INFO [stderr] warning: function is never used: `add_assign`
Dec 17 21:45:54.788 INFO [stderr]   --> src/bin/c17_macro_dry_dsl_variadics.rs:21:9
Dec 17 21:45:54.788 INFO [stderr]    |
Dec 17 21:45:54.788 INFO [stderr] 21 |         fn $func<T: $bound<T, Output=T> + Copy>(xs: &mut Vec<T>, ys: &Vec<T>) {
Dec 17 21:45:54.788 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:54.788 INFO [stderr] ...
Dec 17 21:45:54.788 INFO [stderr] 32 | op!(add_assign, Add, +=, add);
Dec 17 21:45:54.788 INFO [stderr]    | ------------------------------ in this macro invocation
Dec 17 21:45:54.788 INFO [stderr]    |
Dec 17 21:45:54.788 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 21:45:54.788 INFO [stderr] 
Dec 17 21:45:54.788 INFO [stderr] warning: function is never used: `mul_assign`
Dec 17 21:45:54.788 INFO [stderr]   --> src/bin/c17_macro_dry_dsl_variadics.rs:21:9
Dec 17 21:45:54.788 INFO [stderr]    |
Dec 17 21:45:54.788 INFO [stderr] 21 |         fn $func<T: $bound<T, Output=T> + Copy>(xs: &mut Vec<T>, ys: &Vec<T>) {
Dec 17 21:45:54.788 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:54.788 INFO [stderr] ...
Dec 17 21:45:54.788 INFO [stderr] 33 | op!(mul_assign, Mul, *=, mul);
Dec 17 21:45:54.788 INFO [stderr]    | ------------------------------ in this macro invocation
Dec 17 21:45:54.789 INFO [stderr] 
Dec 17 21:45:54.789 INFO [stderr] warning: function is never used: `sub_assign`
Dec 17 21:45:54.789 INFO [stderr]   --> src/bin/c17_macro_dry_dsl_variadics.rs:21:9
Dec 17 21:45:54.789 INFO [stderr]    |
Dec 17 21:45:54.789 INFO [stderr] 21 |         fn $func<T: $bound<T, Output=T> + Copy>(xs: &mut Vec<T>, ys: &Vec<T>) {
Dec 17 21:45:54.789 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:54.789 INFO [stderr] ...
Dec 17 21:45:54.789 INFO [stderr] 34 | op!(sub_assign, Sub, -=, sub);  
Dec 17 21:45:54.789 INFO [stderr]    | ------------------------------ in this macro invocation
Dec 17 21:45:54.789 INFO [stderr] 
Dec 17 21:45:54.802 INFO [stderr] warning: variable `Food` should have a snake case name such as `food`
Dec 17 21:45:54.802 INFO [stderr]   --> src/bin/c18_error_option_unwrap.rs:81:21
Dec 17 21:45:54.802 INFO [stderr]    |
Dec 17 21:45:54.802 INFO [stderr] 81 |         Some(Peeled(Food)) => Some(Chopped(Food)),
Dec 17 21:45:54.802 INFO [stderr]    |                     ^^^^
Dec 17 21:45:54.832 INFO [stderr]    |
Dec 17 21:45:54.832 INFO [stderr]    = note: #[warn(non_snake_case)] on by default
Dec 17 21:45:54.832 INFO [stderr] 
Dec 17 21:45:54.832 INFO [stderr] warning: variable `Food` should have a snake case name such as `food`
Dec 17 21:45:54.832 INFO [stderr]   --> src/bin/c18_error_option_unwrap.rs:87:26
Dec 17 21:45:54.832 INFO [stderr]    |
Dec 17 21:45:54.832 INFO [stderr] 87 |     chopped.map(|Chopped(Food)| Cooked(Food))
Dec 17 21:45:54.832 INFO [stderr]    |                          ^^^^
Dec 17 21:45:54.832 INFO [stderr] 
Dec 17 21:45:55.444 INFO [stderr] warning: field is never used: `p1`
Dec 17 21:45:55.444 INFO [stderr]   --> src/bin/c3_custom_types_structs.rs:25:5
Dec 17 21:45:55.444 INFO [stderr]    |
Dec 17 21:45:55.444 INFO [stderr] 25 |     p1: Point,
Dec 17 21:45:55.444 INFO [stderr]    |     ^^^^^^^^^
Dec 17 21:45:55.444 INFO [stderr]    |
Dec 17 21:45:55.444 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 21:45:55.444 INFO [stderr] 
Dec 17 21:45:55.444 INFO [stderr] warning: field is never used: `p2`
Dec 17 21:45:55.444 INFO [stderr]   --> src/bin/c3_custom_types_structs.rs:26:5
Dec 17 21:45:55.444 INFO [stderr]    |
Dec 17 21:45:55.444 INFO [stderr] 26 |     p2: Point,
Dec 17 21:45:55.444 INFO [stderr]    |     ^^^^^^^^^
Dec 17 21:45:55.444 INFO [stderr] 
Dec 17 21:45:55.903 INFO [stderr] warning: variable `Food` should have a snake case name such as `food`
Dec 17 21:45:55.903 INFO [stderr]   --> src/bin/c18_error_option_unwrap.rs:81:21
Dec 17 21:45:55.903 INFO [stderr]    |
Dec 17 21:45:55.903 INFO [stderr] 81 |         Some(Peeled(Food)) => Some(Chopped(Food)),
Dec 17 21:45:55.903 INFO [stderr]    |                     ^^^^
Dec 17 21:45:55.903 INFO [stderr]    |
Dec 17 21:45:55.903 INFO [stderr]    = note: #[warn(non_snake_case)] on by default
Dec 17 21:45:55.903 INFO [stderr] 
Dec 17 21:45:55.903 INFO [stderr] warning: variable `Food` should have a snake case name such as `food`
Dec 17 21:45:55.903 INFO [stderr]   --> src/bin/c18_error_option_unwrap.rs:87:26
Dec 17 21:45:55.903 INFO [stderr]    |
Dec 17 21:45:55.903 INFO [stderr] 87 |     chopped.map(|Chopped(Food)| Cooked(Food))
Dec 17 21:45:55.903 INFO [stderr]    |                          ^^^^
Dec 17 21:45:55.903 INFO [stderr] 
Dec 17 21:45:56.616 INFO [stderr] warning: function is never used: `foo`
Dec 17 21:45:56.616 INFO [stderr]  --> src/bin/c14_generics_functions_impl_traits.rs:8:1
Dec 17 21:45:56.616 INFO [stderr]   |
Dec 17 21:45:56.616 INFO [stderr] 8 | fn foo<T>(_arg: T) {} // becuase T has been specified as a generic type parameter using <T>, 
Dec 17 21:45:56.616 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^
Dec 17 21:45:56.616 INFO [stderr]   |
Dec 17 21:45:56.616 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 17 21:45:56.616 INFO [stderr] 
Dec 17 21:45:56.616 INFO [stderr] warning: struct is never constructed: `S`
Dec 17 21:45:56.617 INFO [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:48:1
Dec 17 21:45:56.617 INFO [stderr]    |
Dec 17 21:45:56.617 INFO [stderr] 48 | struct S(A); // concrete type S that takes concrete type A defined above // commented for struct S below
Dec 17 21:45:56.617 INFO [stderr]    | ^^^^^^^^^^^^
Dec 17 21:45:56.617 INFO [stderr] 
Dec 17 21:45:56.617 INFO [stderr] warning: struct is never constructed: `SGen`
Dec 17 21:45:56.617 INFO [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:49:1
Dec 17 21:45:56.617 INFO [stderr]    |
Dec 17 21:45:56.617 INFO [stderr] 49 | struct SGen<T>(T); // Generic type SGen
Dec 17 21:45:56.617 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^
Dec 17 21:45:56.617 INFO [stderr] 
Dec 17 21:45:56.617 INFO [stderr] warning: function is never used: `reg_fn`
Dec 17 21:45:56.617 INFO [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:51:1
Dec 17 21:45:56.617 INFO [stderr]    |
Dec 17 21:45:56.617 INFO [stderr] 51 | fn reg_fn(_s: S) {} // a regular function that takes an argument of type S - not a generic function
Dec 17 21:45:56.617 INFO [stderr]    | ^^^^^^^^^^^^^^^^
Dec 17 21:45:56.617 INFO [stderr] 
Dec 17 21:45:56.617 INFO [stderr] warning: function is never used: `gen_spec_t`
Dec 17 21:45:56.617 INFO [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:53:1
Dec 17 21:45:56.617 INFO [stderr]    |
Dec 17 21:45:56.617 INFO [stderr] 53 | fn gen_spec_t(_s: SGen<A>) {} // this is also not a generic as SGen has been given the type A
Dec 17 21:45:56.617 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:56.617 INFO [stderr] 
Dec 17 21:45:56.617 INFO [stderr] warning: function is never used: `gen_spec_i32`
Dec 17 21:45:56.617 INFO [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:54:1
Dec 17 21:45:56.617 INFO [stderr]    |
Dec 17 21:45:56.617 INFO [stderr] 54 | fn gen_spec_i32(_s: SGen<i32>) {} // this is also not a generic
Dec 17 21:45:56.617 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:56.617 INFO [stderr] 
Dec 17 21:45:56.617 INFO [stderr] warning: function is never used: `generic`
Dec 17 21:45:56.617 INFO [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:55:1
Dec 17 21:45:56.617 INFO [stderr]    |
Dec 17 21:45:56.617 INFO [stderr] 55 | fn generic<T>(_s: SGen<T>) {} // a generic function
Dec 17 21:45:56.617 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:56.617 INFO [stderr] 
Dec 17 21:45:56.617 INFO [stderr] warning: struct is never constructed: `S1`
Dec 17 21:45:56.617 INFO [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:59:1
Dec 17 21:45:56.617 INFO [stderr]    |
Dec 17 21:45:56.617 INFO [stderr] 59 | struct S1; // concrete type S
Dec 17 21:45:56.617 INFO [stderr]    | ^^^^^^^^^^
Dec 17 21:45:56.617 INFO [stderr] 
Dec 17 21:45:56.617 INFO [stderr] warning: struct is never constructed: `GenericVal`
Dec 17 21:45:56.617 INFO [stderr]   --> src/bin/c14_generics_functions_impl_traits.rs:60:1
Dec 17 21:45:56.617 INFO [stderr]    |
Dec 17 21:45:56.617 INFO [stderr] 60 | struct GenericVal<T>(T, ); // Generic type GenericVal
Dec 17 21:45:56.617 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:56.617 INFO [stderr] 
Dec 17 21:45:56.813 INFO [stderr] warning: struct is never constructed: `Matrix`
Dec 17 21:45:56.813 INFO [stderr]   --> src/bin/c2_primitives.rs:94:1
Dec 17 21:45:56.813 INFO [stderr]    |
Dec 17 21:45:56.813 INFO [stderr] 94 | struct Matrix(f32, f32, f32, f32);
Dec 17 21:45:56.813 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:56.816 INFO [stderr]    |
Dec 17 21:45:56.816 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 21:45:56.816 INFO [stderr] 
Dec 17 21:45:57.276 INFO [stderr] warning: field is never used: `p1`
Dec 17 21:45:57.276 INFO [stderr]   --> src/bin/c3_custom_types_structs.rs:25:5
Dec 17 21:45:57.276 INFO [stderr]    |
Dec 17 21:45:57.276 INFO [stderr] 25 |     p1: Point,
Dec 17 21:45:57.276 INFO [stderr]    |     ^^^^^^^^^
Dec 17 21:45:57.276 INFO [stderr]    |
Dec 17 21:45:57.276 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 21:45:57.276 INFO [stderr] 
Dec 17 21:45:57.276 INFO [stderr] warning: field is never used: `p2`
Dec 17 21:45:57.276 INFO [stderr]   --> src/bin/c3_custom_types_structs.rs:26:5
Dec 17 21:45:57.276 INFO [stderr]    |
Dec 17 21:45:57.276 INFO [stderr] 26 |     p2: Point,
Dec 17 21:45:57.276 INFO [stderr]    |     ^^^^^^^^^
Dec 17 21:45:57.276 INFO [stderr] 
Dec 17 21:45:58.003 INFO [stderr] warning: function is never used: `foo`
Dec 17 21:45:58.003 INFO [stderr]   --> src/bin/c9_higher_order_diverging_functions.rs:44:1
Dec 17 21:45:58.003 INFO [stderr]    |
Dec 17 21:45:58.003 INFO [stderr] 44 | fn foo() -> ! {
Dec 17 21:45:58.003 INFO [stderr]    | ^^^^^^^^^^^^^
Dec 17 21:45:58.003 INFO [stderr]    |
Dec 17 21:45:58.003 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 21:45:58.003 INFO [stderr] 
Dec 17 21:45:58.156 INFO [stderr] warning: function is never used: `printer`
Dec 17 21:45:58.156 INFO [stderr]  --> src/bin/c14_generics_bounds_where.rs:7:1
Dec 17 21:45:58.156 INFO [stderr]   |
Dec 17 21:45:58.156 INFO [stderr] 7 | fn printer<T: Display>(t: T) {
Dec 17 21:45:58.156 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:58.156 INFO [stderr]   |
Dec 17 21:45:58.156 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 17 21:45:58.156 INFO [stderr] 
Dec 17 21:45:58.156 INFO [stderr] warning: struct is never constructed: `s`
Dec 17 21:45:58.156 INFO [stderr]   --> src/bin/c14_generics_bounds_where.rs:12:1
Dec 17 21:45:58.156 INFO [stderr]    |
Dec 17 21:45:58.156 INFO [stderr] 12 | struct s<T: Display>(T); // S can only be a type that implements the Display trait - so no vectors
Dec 17 21:45:58.156 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:58.156 INFO [stderr] 
Dec 17 21:45:58.156 INFO [stderr] warning: type `s` should have a camel case name such as `S`
Dec 17 21:45:58.156 INFO [stderr]   --> src/bin/c14_generics_bounds_where.rs:12:1
Dec 17 21:45:58.156 INFO [stderr]    |
Dec 17 21:45:58.156 INFO [stderr] 12 | struct s<T: Display>(T); // S can only be a type that implements the Display trait - so no vectors
Dec 17 21:45:58.156 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:58.156 INFO [stderr]    |
Dec 17 21:45:58.156 INFO [stderr]    = note: #[warn(non_camel_case_types)] on by default
Dec 17 21:45:58.157 INFO [stderr] 
Dec 17 21:45:58.291 INFO [stderr] warning: struct is never constructed: `Deep`
Dec 17 21:45:58.291 INFO [stderr]   --> src/bin/c1_formatted_print.rs:34:1
Dec 17 21:45:58.291 INFO [stderr]    |
Dec 17 21:45:58.291 INFO [stderr] 34 | struct Deep(Structure);
Dec 17 21:45:58.291 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:58.291 INFO [stderr]    |
Dec 17 21:45:58.291 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 21:45:58.291 INFO [stderr] 
Dec 17 21:45:58.316 INFO [stderr] warning: function is never used: `foo`
Dec 17 21:45:58.316 INFO [stderr]   --> src/bin/c9_higher_order_diverging_functions.rs:44:1
Dec 17 21:45:58.316 INFO [stderr]    |
Dec 17 21:45:58.316 INFO [stderr] 44 | fn foo() -> ! {
Dec 17 21:45:58.316 INFO [stderr]    | ^^^^^^^^^^^^^
Dec 17 21:45:58.316 INFO [stderr]    |
Dec 17 21:45:58.316 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 21:45:58.316 INFO [stderr] 
Dec 17 21:45:58.540 INFO [stderr] warning: function is never used: `printer`
Dec 17 21:45:58.540 INFO [stderr]  --> src/bin/c14_generics_bounds_where.rs:7:1
Dec 17 21:45:58.540 INFO [stderr]   |
Dec 17 21:45:58.540 INFO [stderr] 7 | fn printer<T: Display>(t: T) {
Dec 17 21:45:58.540 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:58.540 INFO [stderr]   |
Dec 17 21:45:58.540 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 17 21:45:58.540 INFO [stderr] 
Dec 17 21:45:58.540 INFO [stderr] warning: struct is never constructed: `s`
Dec 17 21:45:58.540 INFO [stderr]   --> src/bin/c14_generics_bounds_where.rs:12:1
Dec 17 21:45:58.540 INFO [stderr]    |
Dec 17 21:45:58.540 INFO [stderr] 12 | struct s<T: Display>(T); // S can only be a type that implements the Display trait - so no vectors
Dec 17 21:45:58.540 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:58.540 INFO [stderr] 
Dec 17 21:45:58.540 INFO [stderr] warning: type `s` should have a camel case name such as `S`
Dec 17 21:45:58.540 INFO [stderr]   --> src/bin/c14_generics_bounds_where.rs:12:1
Dec 17 21:45:58.540 INFO [stderr]    |
Dec 17 21:45:58.540 INFO [stderr] 12 | struct s<T: Display>(T); // S can only be a type that implements the Display trait - so no vectors
Dec 17 21:45:58.540 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 21:45:58.543 INFO [stderr]    |
Dec 17 21:45:58.543 INFO [stderr]    = note: #[warn(non_camel_case_types)] on by default
Dec 17 21:45:58.543 INFO [stderr] 
Dec 17 21:45:58.684 INFO [stderr] warning: type alias is never used: `u64_t`
Dec 17 21:45:58.684 INFO [stderr]   --> src/bin/c5_types.rs:14:1
Dec 17 21:45:58.684 INFO [stderr]    |
Dec 17 21:45:58.684 INFO [stderr] 14 | type u64_t = u64;
Dec 17 21:45:58.684 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 17 21:45:58.684 INFO [stderr]    |
Dec 17 21:45:58.684 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 21:45:58.684 INFO [stderr] 
Dec 17 21:45:58.684 INFO [stderr] warning: type `u64_t` should have a camel case name such as `U64T`
Dec 17 21:45:58.684 INFO [stderr]   --> src/bin/c5_types.rs:14:1
Dec 17 21:45:58.684 INFO [stderr]    |
Dec 17 21:45:58.684 INFO [stderr] 14 | type u64_t = u64;
Dec 17 21:45:58.684 INFO [stderr]    | ^^^^^^^^^^^^^^^^^
Dec 17 21:45:58.684 INFO [stderr]    |
Dec 17 21:45:58.684 INFO [stderr]    = note: #[warn(non_camel_case_types)] on by default
Dec 17 21:45:58.684 INFO [stderr] 
Dec 17 21:45:59.229 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.85s
Dec 17 21:45:59.511 INFO running `"docker" "inspect" "c16238984541b756b42b5f5d7017bc5d489e634a42e5978f50af4c2b8aaaea6b"`
Dec 17 21:45:59.608 INFO running `"docker" "rm" "-f" "c16238984541b756b42b5f5d7017bc5d489e634a42e5978f50af4c2b8aaaea6b"`
Dec 17 21:45:59.732 INFO [stdout] c16238984541b756b42b5f5d7017bc5d489e634a42e5978f50af4c2b8aaaea6b