[INFO] cloning repository https://github.com/CarloMicieli/rust_tutorial
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/CarloMicieli/rust_tutorial" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCarloMicieli%2Frust_tutorial"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCarloMicieli%2Frust_tutorial'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2d779014ddd8a8ad7726e284a9b8ae61a4b081ef
[INFO] testing CarloMicieli/rust_tutorial against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCarloMicieli%2Frust_tutorial" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/CarloMicieli/rust_tutorial on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/CarloMicieli/rust_tutorial
[INFO] finished tweaking git repo https://github.com/CarloMicieli/rust_tutorial
[INFO] tweaked toml for git repo https://github.com/CarloMicieli/rust_tutorial written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/CarloMicieli/rust_tutorial already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8fe64ddf440b7d75086a9e8b88a58770b4b1c7156b0227a2bea9f428833452e4
[INFO] running `"docker" "start" "-a" "8fe64ddf440b7d75086a9e8b88a58770b4b1c7156b0227a2bea9f428833452e4"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling rust_tutorial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `thruth`
[INFO] [stderr]  --> src/control_flow/ifs.rs:1:8
[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:9:8
[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:2:8
[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:15:8
[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:24:8
[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: associated function is never used: `constant`
[INFO] [stderr]   --> src/custom_types/expressions.rs:22:12
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn constant(val: i32) -> Exp {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `variable`
[INFO] [stderr]   --> src/custom_types/expressions.rs:29:12
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn variable(name: &str, exp: Exp) -> Exp {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `sum`
[INFO] [stderr]   --> src/custom_types/expressions.rs:36:12
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn sum(lhs: Exp, rhs: Exp) -> Exp {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `eval`
[INFO] [stderr]   --> src/custom_types/expressions.rs:43:12
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn eval(exp: &Exp) -> i32 {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `numerator`
[INFO] [stderr]   --> src/custom_types/rational.rs:26:12
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn numerator(&self) -> i32 {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `denominator`
[INFO] [stderr]   --> src/custom_types/rational.rs:30:12
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn denominator(&self) -> i32 {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `from`
[INFO] [stderr]   --> src/custom_types/rational.rs:35:12
[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:1:4
[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:10:4
[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:18:8
[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:28:4
[INFO] [stderr]    |
[INFO] [stderr] 28 | fn max<T>(a: T, b: T) -> T
[INFO] [stderr]    |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hello`
[INFO] [stderr]  --> src/primitive_types/strings.rs:2:4
[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]    |                              ^^^^ help: use shorthand field pattern: `d`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_shorthand_field_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 22 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `"docker" "inspect" "8fe64ddf440b7d75086a9e8b88a58770b4b1c7156b0227a2bea9f428833452e4"`
[INFO] running `"docker" "rm" "-f" "8fe64ddf440b7d75086a9e8b88a58770b4b1c7156b0227a2bea9f428833452e4"`
[INFO] [stdout] 8fe64ddf440b7d75086a9e8b88a58770b4b1c7156b0227a2bea9f428833452e4
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6b58201be9fa8c58118db8a48467ef4d084bbe395f63044313f53e4f3921d274
[INFO] running `"docker" "start" "-a" "6b58201be9fa8c58118db8a48467ef4d084bbe395f63044313f53e4f3921d274"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling rust_tutorial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `thruth`
[INFO] [stderr]  --> src/control_flow/ifs.rs:1:8
[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:9:8
[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:2:8
[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:15:8
[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:24:8
[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: associated function is never used: `constant`
[INFO] [stderr]   --> src/custom_types/expressions.rs:22:12
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn constant(val: i32) -> Exp {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `variable`
[INFO] [stderr]   --> src/custom_types/expressions.rs:29:12
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn variable(name: &str, exp: Exp) -> Exp {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `sum`
[INFO] [stderr]   --> src/custom_types/expressions.rs:36:12
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn sum(lhs: Exp, rhs: Exp) -> Exp {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `eval`
[INFO] [stderr]   --> src/custom_types/expressions.rs:43:12
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn eval(exp: &Exp) -> i32 {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `numerator`
[INFO] [stderr]   --> src/custom_types/rational.rs:26:12
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn numerator(&self) -> i32 {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `denominator`
[INFO] [stderr]   --> src/custom_types/rational.rs:30:12
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn denominator(&self) -> i32 {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `from`
[INFO] [stderr]   --> src/custom_types/rational.rs:35:12
[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:1:4
[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:10:4
[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:18:8
[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:28:4
[INFO] [stderr]    |
[INFO] [stderr] 28 | fn max<T>(a: T, b: T) -> T
[INFO] [stderr]    |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hello`
[INFO] [stderr]  --> src/primitive_types/strings.rs:2:4
[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]    |                              ^^^^ help: use shorthand field pattern: `d`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_shorthand_field_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 22 warnings emitted
[INFO] [stderr] 
[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: 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]    |                              ^^^^ help: use shorthand field pattern: `d`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_shorthand_field_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.51s
[INFO] running `"docker" "inspect" "6b58201be9fa8c58118db8a48467ef4d084bbe395f63044313f53e4f3921d274"`
[INFO] running `"docker" "rm" "-f" "6b58201be9fa8c58118db8a48467ef4d084bbe395f63044313f53e4f3921d274"`
[INFO] [stdout] 6b58201be9fa8c58118db8a48467ef4d084bbe395f63044313f53e4f3921d274
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2fa53640bd4eec8d6341a2b890a9bc602457fabd5319802acd08067c9fc124d1
[INFO] running `"docker" "start" "-a" "2fa53640bd4eec8d6341a2b890a9bc602457fabd5319802acd08067c9fc124d1"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[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: 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]    |                              ^^^^ help: use shorthand field pattern: `d`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_shorthand_field_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `thruth`
[INFO] [stderr]  --> src/control_flow/ifs.rs:1:8
[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:9:8
[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:2:8
[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:15:8
[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:24:8
[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: associated function is never used: `constant`
[INFO] [stderr]   --> src/custom_types/expressions.rs:22:12
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn constant(val: i32) -> Exp {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `variable`
[INFO] [stderr]   --> src/custom_types/expressions.rs:29:12
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn variable(name: &str, exp: Exp) -> Exp {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `sum`
[INFO] [stderr]   --> src/custom_types/expressions.rs:36:12
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn sum(lhs: Exp, rhs: Exp) -> Exp {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `eval`
[INFO] [stderr]   --> src/custom_types/expressions.rs:43:12
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn eval(exp: &Exp) -> i32 {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `numerator`
[INFO] [stderr]   --> src/custom_types/rational.rs:26:12
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn numerator(&self) -> i32 {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `denominator`
[INFO] [stderr]   --> src/custom_types/rational.rs:30:12
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn denominator(&self) -> i32 {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `from`
[INFO] [stderr]   --> src/custom_types/rational.rs:35:12
[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:1:4
[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:10:4
[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:18:8
[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:28:4
[INFO] [stderr]    |
[INFO] [stderr] 28 | fn max<T>(a: T, b: T) -> T
[INFO] [stderr]    |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hello`
[INFO] [stderr]  --> src/primitive_types/strings.rs:2:4
[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]    |                              ^^^^ help: use shorthand field pattern: `d`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_shorthand_field_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 22 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rust_tutorial-a8f4eb7c9dad1697
[INFO] [stdout] 
[INFO] [stdout] running 45 tests
[INFO] [stdout] test collections::arrays::tests::should_create_an_empty_array ... ok
[INFO] [stdout] test collections::vectors::tests::should_create_an_empty_vector_with_an_initial_capacity ... ok
[INFO] [stdout] test collections::vectors::tests::should_remove_an_element_at_given_index ... ok
[INFO] [stdout] test control_flow::ifs::tests::should_use_ifs_as_expressions ... ok
[INFO] [stdout] test control_flow::loops::tests::should_make_the_sum_from_a_number_to_another ... ok
[INFO] [stdout] test control_flow::loops::tests::should_make_the_sum_from_a_number_to_another2 ... ok
[INFO] [stdout] test control_flow::loops::tests::should_make_the_sum_from_a_number_to_another3 ... ok
[INFO] [stdout] test custom_types::expressions::tests::should_create_a_sum_expression ... ok
[INFO] [stdout] test custom_types::expressions::tests::should_create_new_constant_expressions ... ok
[INFO] [stdout] test custom_types::expressions::tests::should_create_new_variable_with_a_bound_expression ... ok
[INFO] [stdout] test custom_types::rational::tests::should_check_whether_the_rational_number_is_negative ... ok
[INFO] [stdout] test custom_types::rational::tests::should_compare_two_rational_numbers ... ok
[INFO] [stdout] test custom_types::rational::tests::should_create_new_rational_numbers ... ok
[INFO] [stdout] test custom_types::rational::tests::should_create_new_rational_numbers_simplifing_its_values ... ok
[INFO] [stdout] test custom_types::rational::tests::should_create_rational_numbers_from_number ... ok
[INFO] [stdout] test custom_types::rational::tests::should_create_rational_numbers_from_whole_numbers ... ok
[INFO] [stdout] test custom_types::rational::tests::should_display_negative_rational_numbers ... ok
[INFO] [stdout] test custom_types::rational::tests::should_display_rational_numbers ... ok
[INFO] [stdout] test custom_types::rational::tests::should_divide_two_rational_numbers ... ok
[INFO] [stdout] test custom_types::rational::tests::should_multiply_two_rational_numbers ... ok
[INFO] [stdout] test custom_types::rational::tests::should_negate_rational_numbers ... ok
[INFO] [stdout] test control_flow::ifs::tests::should_not_find_truth_in_666 ... ok
[INFO] [stdout] test control_flow::ifs::tests::should_find_truth_in_42 ... ok
[INFO] [stdout] test collections::vectors::tests::should_push_new_elements_onto_vectors ... ok
[INFO] [stdout] test custom_types::rational::tests::should_sum_and_assign_two_rational_numbers ... ok
[INFO] [stdout] test custom_types::rational::tests::should_sum_two_rational_numbers ... ok
[INFO] [stdout] test functions::functions::tests::div_should_return_an_err_result_when_divisor_is_zero ... ok
[INFO] [stdout] test functions::functions::tests::div_should_return_an_ok_result_when_divisor_is_not_zero ... ok
[INFO] [stdout] test functions::functions::tests::fib_should_compute_the_nth_fibonacci_number ... ok
[INFO] [stdout] test functions::functions::tests::max_should_find_max_between_two_f32_values ... ok
[INFO] [stdout] test functions::functions::tests::max_should_find_max_between_two_i32_values ... ok
[INFO] [stdout] test functions::functions::tests::sum_should_add_two_i32_values ... ok
[INFO] [stdout] test primitive_types::strings::tests::hello_should_make_a_greeting ... ok
[INFO] [stdout] test collections::vectors::tests::should_pop_elements_from_a_vector ... ok
[INFO] [stdout] test collections::vectors::tests::should_create_a_new_vector_from_iterator_values ... ok
[INFO] [stdout] test collections::vectors::tests::should_init_a_vector_with_the_same_value ... ok
[INFO] [stdout] test custom_types::rational::tests::should_substract_and_assign_two_rational_numbers ... ok
[INFO] [stdout] test collections::vectors::tests::should_increase_a_vector_adding_elements_over_its_capacity ... ok
[INFO] [stdout] test collections::vectors::tests::should_insert_an_element_at_given_index ... ok
[INFO] [stdout] test collections::vectors::tests::should_create_an_empty_vector ... ok
[INFO] [stdout] test custom_types::expressions::tests::should_evaluate_expressions ... ok
[INFO] [stdout] test custom_types::rational::tests::should_check_whether_the_rational_number_is_positive ... ok
[INFO] [stdout] test custom_types::rational::tests::should_make_the_difference_between_two_rational_numbers ... ok
[INFO] [stdout] test custom_types::rational::tests::should_panic_when_the_rhs_numerator_is_zero ... ok
[INFO] [stderr]    Doc-tests rust_tutorial
[INFO] [stdout] test custom_types::rational::tests::should_panic_when_denominator_is_zero ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 45 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "2fa53640bd4eec8d6341a2b890a9bc602457fabd5319802acd08067c9fc124d1"`
[INFO] running `"docker" "rm" "-f" "2fa53640bd4eec8d6341a2b890a9bc602457fabd5319802acd08067c9fc124d1"`
[INFO] [stdout] 2fa53640bd4eec8d6341a2b890a9bc602457fabd5319802acd08067c9fc124d1