[INFO] updating cached repository CarloMicieli/rust_tutorial
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/CarloMicieli/rust_tutorial
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/CarloMicieli/rust_tutorial" "work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/CarloMicieli/rust_tutorial"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/CarloMicieli/rust_tutorial'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/CarloMicieli/rust_tutorial" "work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/CarloMicieli/rust_tutorial"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/CarloMicieli/rust_tutorial'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 40e53e04214f9147c7e45942a4cb2c041f235287
[INFO] sha for GitHub repo CarloMicieli/rust_tutorial: 40e53e04214f9147c7e45942a4cb2c041f235287
[INFO] validating manifest of CarloMicieli/rust_tutorial 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 CarloMicieli/rust_tutorial 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 CarloMicieli/rust_tutorial
[INFO] finished frobbing CarloMicieli/rust_tutorial
[INFO] frobbed toml for CarloMicieli/rust_tutorial written to work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/CarloMicieli/rust_tutorial/Cargo.toml
[INFO] started frobbing CarloMicieli/rust_tutorial
[INFO] finished frobbing CarloMicieli/rust_tutorial
[INFO] frobbed toml for CarloMicieli/rust_tutorial written to work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/CarloMicieli/rust_tutorial/Cargo.toml
[INFO] crate CarloMicieli/rust_tutorial 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 CarloMicieli/rust_tutorial against master#a850a426491e14186af2250549bf41256b5938d2 for pr-60162
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60162/worker-5/master#a850a426491e14186af2250549bf41256b5938d2:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/CarloMicieli/rust_tutorial:/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] d17e6773ab1af974e9499e3ee28a0e072fe6a460af4580606bf813a32e574da3
[INFO] running `"docker" "start" "-a" "d17e6773ab1af974e9499e3ee28a0e072fe6a460af4580606bf813a32e574da3"`
[INFO] [stderr]     Checking rust_tutorial v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]  --> src/collections/arrays.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     use super::*;
[INFO] [stderr]   |         ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]  --> src/collections/vectors.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     use super::*;
[INFO] [stderr]   |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `thruth`
[INFO] [stderr]  --> src/control_flow/ifs.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn thruth(x: i32) -> bool {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `if_as_expression`
[INFO] [stderr]  --> src/control_flow/ifs.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn if_as_expression(x: i32) -> &'static str {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sum`
[INFO] [stderr]  --> src/control_flow/loops.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub fn sum(from: i32, to: i32) -> i32 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sum2`
[INFO] [stderr]   --> src/control_flow/loops.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub fn sum2(from: i32, to: i32) -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sum3`
[INFO] [stderr]   --> src/control_flow/loops.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub fn sum3(from: i32, to: i32) -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Val`
[INFO] [stderr]  --> src/custom_types/expressions.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     Val { n: i32 },
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Variable`
[INFO] [stderr]  --> src/custom_types/expressions.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     Variable { name: String, exp: Box<Exp> },
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Sum`
[INFO] [stderr]  --> src/custom_types/expressions.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     Sum { lhs: Box<Exp>, rhs: Box<Exp> },
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `constant`
[INFO] [stderr]   --> src/custom_types/expressions.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn constant(val: i32) -> Exp {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `variable`
[INFO] [stderr]   --> src/custom_types/expressions.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn variable(name: &str, exp: Exp) -> Exp {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sum`
[INFO] [stderr]   --> src/custom_types/expressions.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn sum(lhs: Exp, rhs: Exp) -> Exp {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `eval`
[INFO] [stderr]   --> src/custom_types/expressions.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn eval(exp: &Exp) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `numerator`
[INFO] [stderr]   --> src/custom_types/rational.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn numerator(&self) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `denominator`
[INFO] [stderr]   --> src/custom_types/rational.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn denominator(&self) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from`
[INFO] [stderr]   --> src/custom_types/rational.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     pub fn from(num: i32) -> Rational {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sum`
[INFO] [stderr]  --> src/functions/functions.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn sum(a: i32, b: i32) -> i32 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `DividedByZero`
[INFO] [stderr]  --> src/functions/functions.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     DividedByZero,
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `div`
[INFO] [stderr]   --> src/functions/functions.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn div(a: i32, b: i32) -> Result<i32, DivError> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fib`
[INFO] [stderr]   --> src/functions/functions.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub fn fib(n: i32) -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `max`
[INFO] [stderr]   --> src/functions/functions.rs:28:1
[INFO] [stderr]    |
[INFO] [stderr] 28 | / fn max<T>(a: T, b: T) -> T
[INFO] [stderr] 29 | | where
[INFO] [stderr] 30 | |     T: PartialOrd,
[INFO] [stderr] 31 | | {
[INFO] [stderr] ...  |
[INFO] [stderr] 36 | |     }
[INFO] [stderr] 37 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hello`
[INFO] [stderr]  --> src/primitive_types/strings.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | fn hello(name: &str) -> String {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the `d:` in this pattern is redundant
[INFO] [stderr]   --> src/custom_types/rational.rs:80:30
[INFO] [stderr]    |
[INFO] [stderr] 80 |         let Rational { n: c, d: d } = other;
[INFO] [stderr]    |                              --^^
[INFO] [stderr]    |                              |
[INFO] [stderr]    |                              help: remove this
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_shorthand_field_patterns)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the `d:` in this pattern is redundant
[INFO] [stderr]   --> src/custom_types/rational.rs:80:30
[INFO] [stderr]    |
[INFO] [stderr] 80 |         let Rational { n: c, d: d } = other;
[INFO] [stderr]    |                              --^^
[INFO] [stderr]    |                              |
[INFO] [stderr]    |                              help: remove this
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_shorthand_field_patterns)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `"docker" "inspect" "d17e6773ab1af974e9499e3ee28a0e072fe6a460af4580606bf813a32e574da3"`
[INFO] running `"docker" "rm" "-f" "d17e6773ab1af974e9499e3ee28a0e072fe6a460af4580606bf813a32e574da3"`
[INFO] [stdout] d17e6773ab1af974e9499e3ee28a0e072fe6a460af4580606bf813a32e574da3