Dec 18 08:12:41.086 INFO checking CarloMicieli/rust_tutorial against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 08:12:41.087 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/CarloMicieli/rust_tutorial:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 08:12:41.488 INFO [stdout] 4fc0243837e39e5fb3c1d3b179fe9b14974536e38cc08c8c9ccce2750febbe63
Dec 18 08:12:41.493 INFO running `"docker" "start" "-a" "4fc0243837e39e5fb3c1d3b179fe9b14974536e38cc08c8c9ccce2750febbe63"`
Dec 18 08:12:42.112 INFO [stderr]     Checking rust_tutorial v0.1.0 (/opt/crater/workdir)
Dec 18 08:12:42.372 INFO [stderr] warning: unused import: `super::*`
Dec 18 08:12:42.372 INFO [stderr]  --> src/collections/arrays.rs:4:9
Dec 18 08:12:42.372 INFO [stderr]   |
Dec 18 08:12:42.372 INFO [stderr] 4 |     use super::*;
Dec 18 08:12:42.372 INFO [stderr]   |         ^^^^^^^^
Dec 18 08:12:42.372 INFO [stderr]   |
Dec 18 08:12:42.372 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 08:12:42.372 INFO [stderr] 
Dec 18 08:12:42.372 INFO [stderr] warning: unused import: `super::*`
Dec 18 08:12:42.373 INFO [stderr]  --> src/collections/vectors.rs:4:9
Dec 18 08:12:42.373 INFO [stderr]   |
Dec 18 08:12:42.373 INFO [stderr] 4 |     use super::*;
Dec 18 08:12:42.373 INFO [stderr]   |         ^^^^^^^^
Dec 18 08:12:42.373 INFO [stderr] 
Dec 18 08:12:42.401 INFO [stderr] warning: function is never used: `thruth`
Dec 18 08:12:42.402 INFO [stderr]  --> src/control_flow/ifs.rs:1:1
Dec 18 08:12:42.402 INFO [stderr]   |
Dec 18 08:12:42.402 INFO [stderr] 1 | pub fn thruth(x: i32) -> bool {
Dec 18 08:12:42.402 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:12:42.402 INFO [stderr]   |
Dec 18 08:12:42.402 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 18 08:12:42.402 INFO [stderr] 
Dec 18 08:12:42.402 INFO [stderr] warning: function is never used: `if_as_expression`
Dec 18 08:12:42.402 INFO [stderr]  --> src/control_flow/ifs.rs:9:1
Dec 18 08:12:42.402 INFO [stderr]   |
Dec 18 08:12:42.402 INFO [stderr] 9 | pub fn if_as_expression(x: i32) -> &'static str {
Dec 18 08:12:42.404 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:12:42.404 INFO [stderr] 
Dec 18 08:12:42.404 INFO [stderr] warning: function is never used: `sum`
Dec 18 08:12:42.404 INFO [stderr]  --> src/control_flow/loops.rs:2:1
Dec 18 08:12:42.404 INFO [stderr]   |
Dec 18 08:12:42.404 INFO [stderr] 2 | pub fn sum(from: i32, to: i32) -> i32 {
Dec 18 08:12:42.404 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:12:42.404 INFO [stderr] 
Dec 18 08:12:42.404 INFO [stderr] warning: function is never used: `sum2`
Dec 18 08:12:42.404 INFO [stderr]   --> src/control_flow/loops.rs:15:1
Dec 18 08:12:42.404 INFO [stderr]    |
Dec 18 08:12:42.404 INFO [stderr] 15 | pub fn sum2(from: i32, to: i32) -> i32 {
Dec 18 08:12:42.404 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:12:42.404 INFO [stderr] 
Dec 18 08:12:42.404 INFO [stderr] warning: function is never used: `sum3`
Dec 18 08:12:42.404 INFO [stderr]   --> src/control_flow/loops.rs:24:1
Dec 18 08:12:42.404 INFO [stderr]    |
Dec 18 08:12:42.405 INFO [stderr] 24 | pub fn sum3(from: i32, to: i32) -> i32 {
Dec 18 08:12:42.405 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:12:42.405 INFO [stderr] 
Dec 18 08:12:42.405 INFO [stderr] warning: variant is never constructed: `Val`
Dec 18 08:12:42.405 INFO [stderr]  --> src/custom_types/expressions.rs:5:5
Dec 18 08:12:42.405 INFO [stderr]   |
Dec 18 08:12:42.406 INFO [stderr] 5 |     Val { n: i32 },
Dec 18 08:12:42.406 INFO [stderr]   |     ^^^^^^^^^^^^^^
Dec 18 08:12:42.406 INFO [stderr] 
Dec 18 08:12:42.406 INFO [stderr] warning: variant is never constructed: `Variable`
Dec 18 08:12:42.407 INFO [stderr]  --> src/custom_types/expressions.rs:6:5
Dec 18 08:12:42.407 INFO [stderr]   |
Dec 18 08:12:42.407 INFO [stderr] 6 |     Variable { name: String, exp: Box<Exp> },
Dec 18 08:12:42.407 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:12:42.407 INFO [stderr] 
Dec 18 08:12:42.407 INFO [stderr] warning: variant is never constructed: `Sum`
Dec 18 08:12:42.407 INFO [stderr]  --> src/custom_types/expressions.rs:7:5
Dec 18 08:12:42.407 INFO [stderr]   |
Dec 18 08:12:42.407 INFO [stderr] 7 |     Sum { lhs: Box<Exp>, rhs: Box<Exp> },
Dec 18 08:12:42.407 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:12:42.407 INFO [stderr] 
Dec 18 08:12:42.407 INFO [stderr] warning: method is never used: `constant`
Dec 18 08:12:42.407 INFO [stderr]   --> src/custom_types/expressions.rs:22:5
Dec 18 08:12:42.407 INFO [stderr]    |
Dec 18 08:12:42.407 INFO [stderr] 22 |     pub fn constant(val: i32) -> Exp {
Dec 18 08:12:42.407 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:12:42.407 INFO [stderr] 
Dec 18 08:12:42.408 INFO [stderr] warning: method is never used: `variable`
Dec 18 08:12:42.408 INFO [stderr]   --> src/custom_types/expressions.rs:29:5
Dec 18 08:12:42.408 INFO [stderr]    |
Dec 18 08:12:42.408 INFO [stderr] 29 |     pub fn variable(name: &str, exp: Exp) -> Exp {
Dec 18 08:12:42.408 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:12:42.408 INFO [stderr] 
Dec 18 08:12:42.408 INFO [stderr] warning: method is never used: `sum`
Dec 18 08:12:42.408 INFO [stderr]   --> src/custom_types/expressions.rs:36:5
Dec 18 08:12:42.408 INFO [stderr]    |
Dec 18 08:12:42.408 INFO [stderr] 36 |     pub fn sum(lhs: Exp, rhs: Exp) -> Exp {
Dec 18 08:12:42.408 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:12:42.408 INFO [stderr] 
Dec 18 08:12:42.408 INFO [stderr] warning: method is never used: `eval`
Dec 18 08:12:42.408 INFO [stderr]   --> src/custom_types/expressions.rs:43:5
Dec 18 08:12:42.408 INFO [stderr]    |
Dec 18 08:12:42.408 INFO [stderr] 43 |     pub fn eval(exp: &Exp) -> i32 {
Dec 18 08:12:42.408 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:12:42.408 INFO [stderr] 
Dec 18 08:12:42.409 INFO [stderr] warning: method is never used: `numerator`
Dec 18 08:12:42.409 INFO [stderr]   --> src/custom_types/rational.rs:26:5
Dec 18 08:12:42.409 INFO [stderr]    |
Dec 18 08:12:42.409 INFO [stderr] 26 |     pub fn numerator(&self) -> i32 {
Dec 18 08:12:42.409 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:12:42.409 INFO [stderr] 
Dec 18 08:12:42.409 INFO [stderr] warning: method is never used: `denominator`
Dec 18 08:12:42.409 INFO [stderr]   --> src/custom_types/rational.rs:30:5
Dec 18 08:12:42.409 INFO [stderr]    |
Dec 18 08:12:42.409 INFO [stderr] 30 |     pub fn denominator(&self) -> i32 {
Dec 18 08:12:42.409 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:12:42.409 INFO [stderr] 
Dec 18 08:12:42.409 INFO [stderr] warning: method is never used: `from`
Dec 18 08:12:42.409 INFO [stderr]   --> src/custom_types/rational.rs:35:5
Dec 18 08:12:42.409 INFO [stderr]    |
Dec 18 08:12:42.409 INFO [stderr] 35 |     pub fn from(num: i32) -> Rational {
Dec 18 08:12:42.409 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:12:42.409 INFO [stderr] 
Dec 18 08:12:42.410 INFO [stderr] warning: function is never used: `sum`
Dec 18 08:12:42.410 INFO [stderr]  --> src/functions/functions.rs:1:1
Dec 18 08:12:42.410 INFO [stderr]   |
Dec 18 08:12:42.410 INFO [stderr] 1 | fn sum(a: i32, b: i32) -> i32 {
Dec 18 08:12:42.410 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:12:42.410 INFO [stderr] 
Dec 18 08:12:42.410 INFO [stderr] warning: variant is never constructed: `DividedByZero`
Dec 18 08:12:42.410 INFO [stderr]  --> src/functions/functions.rs:7:5
Dec 18 08:12:42.410 INFO [stderr]   |
Dec 18 08:12:42.410 INFO [stderr] 7 |     DividedByZero,
Dec 18 08:12:42.410 INFO [stderr]   |     ^^^^^^^^^^^^^
Dec 18 08:12:42.410 INFO [stderr] 
Dec 18 08:12:42.410 INFO [stderr] warning: function is never used: `div`
Dec 18 08:12:42.410 INFO [stderr]   --> src/functions/functions.rs:10:1
Dec 18 08:12:42.410 INFO [stderr]    |
Dec 18 08:12:42.410 INFO [stderr] 10 | fn div(a: i32, b: i32) -> Result<i32, DivError> {
Dec 18 08:12:42.410 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:12:42.410 INFO [stderr] 
Dec 18 08:12:42.411 INFO [stderr] warning: function is never used: `fib`
Dec 18 08:12:42.411 INFO [stderr]   --> src/functions/functions.rs:18:1
Dec 18 08:12:42.411 INFO [stderr]    |
Dec 18 08:12:42.411 INFO [stderr] 18 | pub fn fib(n: i32) -> i32 {
Dec 18 08:12:42.411 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:12:42.411 INFO [stderr] 
Dec 18 08:12:42.411 INFO [stderr] warning: function is never used: `max`
Dec 18 08:12:42.411 INFO [stderr]   --> src/functions/functions.rs:28:1
Dec 18 08:12:42.411 INFO [stderr]    |
Dec 18 08:12:42.411 INFO [stderr] 28 | / fn max<T>(a: T, b: T) -> T
Dec 18 08:12:42.411 INFO [stderr] 29 | | where
Dec 18 08:12:42.411 INFO [stderr] 30 | |     T: PartialOrd,
Dec 18 08:12:42.411 INFO [stderr] 31 | | {
Dec 18 08:12:42.411 INFO [stderr] ...  |
Dec 18 08:12:42.411 INFO [stderr] 36 | |     }
Dec 18 08:12:42.411 INFO [stderr] 37 | | }
Dec 18 08:12:42.411 INFO [stderr]    | |_^
Dec 18 08:12:42.411 INFO [stderr] 
Dec 18 08:12:42.412 INFO [stderr] warning: function is never used: `hello`
Dec 18 08:12:42.412 INFO [stderr]  --> src/primitive_types/strings.rs:2:1
Dec 18 08:12:42.412 INFO [stderr]   |
Dec 18 08:12:42.412 INFO [stderr] 2 | fn hello(name: &str) -> String {
Dec 18 08:12:42.412 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:12:42.412 INFO [stderr] 
Dec 18 08:12:42.422 INFO [stderr] warning: the `d:` in this pattern is redundant
Dec 18 08:12:42.422 INFO [stderr]   --> src/custom_types/rational.rs:80:30
Dec 18 08:12:42.422 INFO [stderr]    |
Dec 18 08:12:42.422 INFO [stderr] 80 |         let Rational { n: c, d: d } = other;
Dec 18 08:12:42.422 INFO [stderr]    |                              --^^
Dec 18 08:12:42.422 INFO [stderr]    |                              |
Dec 18 08:12:42.422 INFO [stderr]    |                              help: remove this
Dec 18 08:12:42.422 INFO [stderr]    |
Dec 18 08:12:42.422 INFO [stderr]    = note: #[warn(non_shorthand_field_patterns)] on by default
Dec 18 08:12:42.422 INFO [stderr] 
Dec 18 08:12:42.794 INFO [stderr] warning: the `d:` in this pattern is redundant
Dec 18 08:12:42.794 INFO [stderr]   --> src/custom_types/rational.rs:80:30
Dec 18 08:12:42.794 INFO [stderr]    |
Dec 18 08:12:42.794 INFO [stderr] 80 |         let Rational { n: c, d: d } = other;
Dec 18 08:12:42.794 INFO [stderr]    |                              --^^
Dec 18 08:12:42.794 INFO [stderr]    |                              |
Dec 18 08:12:42.794 INFO [stderr]    |                              help: remove this
Dec 18 08:12:42.794 INFO [stderr]    |
Dec 18 08:12:42.794 INFO [stderr]    = note: #[warn(non_shorthand_field_patterns)] on by default
Dec 18 08:12:42.794 INFO [stderr] 
Dec 18 08:12:42.827 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.73s
Dec 18 08:12:43.077 INFO running `"docker" "inspect" "4fc0243837e39e5fb3c1d3b179fe9b14974536e38cc08c8c9ccce2750febbe63"`
Dec 18 08:12:43.154 INFO running `"docker" "rm" "-f" "4fc0243837e39e5fb3c1d3b179fe9b14974536e38cc08c8c9ccce2750febbe63"`
Dec 18 08:12:43.274 INFO [stdout] 4fc0243837e39e5fb3c1d3b179fe9b14974536e38cc08c8c9ccce2750febbe63