[INFO] cloning repository https://github.com/Jeordman/rust_basics
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Jeordman/rust_basics" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJeordman%2Frust_basics", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJeordman%2Frust_basics'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] eb6d646e580626f4967fdf05a9c6d973b7aefa31
[INFO] checking Jeordman/rust_basics against try#4e55a504843955c97eb06907c71f6f3e99208021 for pr-146978
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJeordman%2Frust_basics" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Jeordman/rust_basics
[INFO] finished tweaking git repo https://github.com/Jeordman/rust_basics
[INFO] tweaked toml for git repo https://github.com/Jeordman/rust_basics written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Jeordman/rust_basics on toolchain 4e55a504843955c97eb06907c71f6f3e99208021
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4e55a504843955c97eb06907c71f6f3e99208021" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Jeordman/rust_basics already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4e55a504843955c97eb06907c71f6f3e99208021" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4e55a504843955c97eb06907c71f6f3e99208021" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8422889c0f83e5dbf59fa33042f1c6f85868ce7997d8b7f03d96a76ce760ddc9
[INFO] running `Command { std: "docker" "start" "-a" "8422889c0f83e5dbf59fa33042f1c6f85868ce7997d8b7f03d96a76ce760ddc9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8422889c0f83e5dbf59fa33042f1c6f85868ce7997d8b7f03d96a76ce760ddc9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8422889c0f83e5dbf59fa33042f1c6f85868ce7997d8b7f03d96a76ce760ddc9", kill_on_drop: false }`
[INFO] [stdout] 8422889c0f83e5dbf59fa33042f1c6f85868ce7997d8b7f03d96a76ce760ddc9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4e55a504843955c97eb06907c71f6f3e99208021" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7e4377bca08507e2d869ab52bd5e5451bf756439857b120f945252575b708b8b
[INFO] running `Command { std: "docker" "start" "-a" "7e4377bca08507e2d869ab52bd5e5451bf756439857b120f945252575b708b8b", kill_on_drop: false }`
[INFO] [stderr]     Checking first v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `my_name`
[INFO] [stdout]   --> src/var.rs:19:11
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let ( my_name, my_age ) = ("Jeordin", 24);
[INFO] [stdout]    |           ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_name`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_age`
[INFO] [stdout]   --> src/var.rs:19:20
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let ( my_name, my_age ) = ("Jeordin", 24);
[INFO] [stdout]    |                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_age`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `age` is never read
[INFO] [stdout]  --> src/var.rs:5:19
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut age = 24;
[INFO] [stdout]   |                   ^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_name`
[INFO] [stdout]   --> src/var.rs:19:11
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let ( my_name, my_age ) = ("Jeordin", 24);
[INFO] [stdout]    |           ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_name`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_age`
[INFO] [stdout]   --> src/var.rs:19:20
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let ( my_name, my_age ) = ("Jeordin", 24);
[INFO] [stdout]    |                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_age`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `age` is never read
[INFO] [stdout]  --> src/var.rs:5:19
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut age = 24;
[INFO] [stdout]   |                   ^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_of_age`
[INFO] [stdout]   --> src/conditionals.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let is_of_age = if age >= 21 {true} else {false};
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_of_age`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_of_age`
[INFO] [stdout]   --> src/conditionals.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let is_of_age = if age >= 21 {true} else {false};
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_of_age`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `add_nums`
[INFO] [stdout]   --> src/functions.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let add_nums = |n1: i32, n2: i32| n1 + n2 + n3;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_add_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `greet`
[INFO] [stdout]  --> src/functions.rs:2:14
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn greet(greet: &str, name: &str) { }
[INFO] [stdout]   |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_greet`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `add_nums`
[INFO] [stdout]   --> src/functions.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let add_nums = |n1: i32, n2: i32| n1 + n2 + n3;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_add_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]  --> src/functions.rs:2:27
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn greet(greet: &str, name: &str) { }
[INFO] [stdout]   |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `greet`
[INFO] [stdout]  --> src/functions.rs:2:14
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn greet(greet: &str, name: &str) { }
[INFO] [stdout]   |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_greet`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]  --> src/functions.rs:2:27
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn greet(greet: &str, name: &str) { }
[INFO] [stdout]   |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr2`
[INFO] [stdout]  --> src/pointers.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let arr2 = arr1;
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_arr2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr2`
[INFO] [stdout]  --> src/pointers.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let arr2 = arr1;
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_arr2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/structs.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let mut p = Person::new("John", "Doe");
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/structs.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let mut p = Person::new("John", "Doe");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/structs.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let mut p = Person::new("John", "Doe");
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `greet` is never used
[INFO] [stdout]  --> src/functions.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn greet(greet: &str, name: &str) { }
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]  --> src/functions.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 |     fn add(n1: i32, n2: i32) -> i32 {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `first_name` and `last_name` are never read
[INFO] [stdout]   --> src/structs.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Person {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 12 |     first_name: String,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 13 |     last_name: String,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `full_name` is never used
[INFO] [stdout]   --> src/structs.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Person {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 25 |     fn full_name(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/structs.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let mut p = Person::new("John", "Doe");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `greet` is never used
[INFO] [stdout]  --> src/functions.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn greet(greet: &str, name: &str) { }
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]  --> src/functions.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 |     fn add(n1: i32, n2: i32) -> i32 {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `first_name` and `last_name` are never read
[INFO] [stdout]   --> src/structs.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Person {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 12 |     first_name: String,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 13 |     last_name: String,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `full_name` is never used
[INFO] [stdout]   --> src/structs.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Person {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 25 |     fn full_name(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "7e4377bca08507e2d869ab52bd5e5451bf756439857b120f945252575b708b8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e4377bca08507e2d869ab52bd5e5451bf756439857b120f945252575b708b8b", kill_on_drop: false }`
[INFO] [stdout] 7e4377bca08507e2d869ab52bd5e5451bf756439857b120f945252575b708b8b
