[INFO] cloning repository https://github.com/joshunrau/learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/joshunrau/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoshunrau%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoshunrau%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f62a629e2dafe0a9ab014fa371a57e103c278c4f
[INFO] checking joshunrau/learn-rust against try#a9fc5861842d0dd949115c5f7677a90b5e29a4cf for pr-115583-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoshunrau%2Flearn-rust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/joshunrau/learn-rust on toolchain a9fc5861842d0dd949115c5f7677a90b5e29a4cf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a9fc5861842d0dd949115c5f7677a90b5e29a4cf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/joshunrau/learn-rust
[INFO] finished tweaking git repo https://github.com/joshunrau/learn-rust
[INFO] tweaked toml for git repo https://github.com/joshunrau/learn-rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/joshunrau/learn-rust 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" "+a9fc5861842d0dd949115c5f7677a90b5e29a4cf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:8d77639b970c52ec67607038b3ec48894629de24504b62a68269497566821cc0" "/opt/rustwide/cargo-home/bin/cargo" "+a9fc5861842d0dd949115c5f7677a90b5e29a4cf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 02a0b19ef27643d10d6cde19fb2cc12171d4103803bfddfdefdd15808fc45297
[INFO] running `Command { std: "docker" "start" "-a" "02a0b19ef27643d10d6cde19fb2cc12171d4103803bfddfdefdd15808fc45297", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "02a0b19ef27643d10d6cde19fb2cc12171d4103803bfddfdefdd15808fc45297", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02a0b19ef27643d10d6cde19fb2cc12171d4103803bfddfdefdd15808fc45297", kill_on_drop: false }`
[INFO] [stdout] 02a0b19ef27643d10d6cde19fb2cc12171d4103803bfddfdefdd15808fc45297
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:8d77639b970c52ec67607038b3ec48894629de24504b62a68269497566821cc0" "/opt/rustwide/cargo-home/bin/cargo" "+a9fc5861842d0dd949115c5f7677a90b5e29a4cf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5b3d506b1aee817c4c2ae8c5afc4ec39266387ba739a92666934b3e315ba8484
[INFO] running `Command { std: "docker" "start" "-a" "5b3d506b1aee817c4c2ae8c5afc4ec39266387ba739a92666934b3e315ba8484", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking getrandom v0.2.9
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking learn_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `guessing_game` is never used
[INFO] [stdout]  --> src/basics.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn guessing_game() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `variables` is never used
[INFO] [stdout]   --> src/basics.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn variables() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `scalar_types` is never used
[INFO] [stdout]   --> src/basics.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn scalar_types() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `compound_types` is never used
[INFO] [stdout]   --> src/basics.rs:97:4
[INFO] [stdout]    |
[INFO] [stdout] 97 | fn compound_types() -> () {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `functions` is never used
[INFO] [stdout]    --> src/basics.rs:136:4
[INFO] [stdout]     |
[INFO] [stdout] 136 | fn functions() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `V4` and `V6` are never constructed
[INFO] [stdout]  --> src/enums.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum IpAddr {
[INFO] [stdout]   |      ------ variants in this enum
[INFO] [stdout] 3 |     V4(u8, u8, u8, u8),
[INFO] [stdout]   |     ^^
[INFO] [stdout] 4 |     V6(String),
[INFO] [stdout]   |     ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print` is never used
[INFO] [stdout]  --> src/enums.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl IpAddr {
[INFO] [stdout]   | ----------- method in this implementation
[INFO] [stdout] 8 |     fn print(&self) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Alabama` and `Alaska` are never constructed
[INFO] [stdout]   --> src/enums.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | enum UsState {
[INFO] [stdout]    |      ------- variants in this enum
[INFO] [stdout] 15 |     Alabama,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 16 |     Alaska,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Coin` is never used
[INFO] [stdout]   --> src/enums.rs:20:6
[INFO] [stdout]    |
[INFO] [stdout] 20 | enum Coin {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `value_in_cents` is never used
[INFO] [stdout]   --> src/enums.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn value_in_cents(coin: Coin) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `plus_one` is never used
[INFO] [stdout]   --> src/enums.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn plus_one(x: Option<i32>) -> Option<i32> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/enums.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `first_name` and `age` are never read
[INFO] [stdout]  --> src/structs.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Person {
[INFO] [stdout]   |        ------ fields in this struct
[INFO] [stdout] 3 |     first_name: String,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 4 |     age: u64,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_person` is never used
[INFO] [stdout]  --> src/structs.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn create_person(first_name: String, age: u64) -> Person {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Color` is never constructed
[INFO] [stdout]   --> src/structs.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Color(i32, i32, i32);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1` is never used
[INFO] [stdout]   --> src/structs.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn f1() {
[INFO] [stdout]    |    ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width` and `height` are never read
[INFO] [stdout]   --> src/structs.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct Rectangle {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 40 |     width: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 41 |     height: u32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `area` are never used
[INFO] [stdout]   --> src/structs.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl Rectangle {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 45 |     fn new(width: u32, height: u32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2` is never used
[INFO] [stdout]   --> src/structs.rs:54:4
[INFO] [stdout]    |
[INFO] [stdout] 54 | fn f2() {
[INFO] [stdout]    |    ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `guessing_game` is never used
[INFO] [stdout]  --> src/basics.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn guessing_game() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `variables` is never used
[INFO] [stdout]   --> src/basics.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn variables() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `scalar_types` is never used
[INFO] [stdout]   --> src/basics.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn scalar_types() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `compound_types` is never used
[INFO] [stdout]   --> src/basics.rs:97:4
[INFO] [stdout]    |
[INFO] [stdout] 97 | fn compound_types() -> () {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `functions` is never used
[INFO] [stdout]    --> src/basics.rs:136:4
[INFO] [stdout]     |
[INFO] [stdout] 136 | fn functions() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `V4` and `V6` are never constructed
[INFO] [stdout]  --> src/enums.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum IpAddr {
[INFO] [stdout]   |      ------ variants in this enum
[INFO] [stdout] 3 |     V4(u8, u8, u8, u8),
[INFO] [stdout]   |     ^^
[INFO] [stdout] 4 |     V6(String),
[INFO] [stdout]   |     ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print` is never used
[INFO] [stdout]  --> src/enums.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl IpAddr {
[INFO] [stdout]   | ----------- method in this implementation
[INFO] [stdout] 8 |     fn print(&self) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Alabama` and `Alaska` are never constructed
[INFO] [stdout]   --> src/enums.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | enum UsState {
[INFO] [stdout]    |      ------- variants in this enum
[INFO] [stdout] 15 |     Alabama,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 16 |     Alaska,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Coin` is never used
[INFO] [stdout]   --> src/enums.rs:20:6
[INFO] [stdout]    |
[INFO] [stdout] 20 | enum Coin {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `value_in_cents` is never used
[INFO] [stdout]   --> src/enums.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn value_in_cents(coin: Coin) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `plus_one` is never used
[INFO] [stdout]   --> src/enums.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn plus_one(x: Option<i32>) -> Option<i32> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/enums.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `first_name` and `age` are never read
[INFO] [stdout]  --> src/structs.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Person {
[INFO] [stdout]   |        ------ fields in this struct
[INFO] [stdout] 3 |     first_name: String,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 4 |     age: u64,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_person` is never used
[INFO] [stdout]  --> src/structs.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn create_person(first_name: String, age: u64) -> Person {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Color` is never constructed
[INFO] [stdout]   --> src/structs.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Color(i32, i32, i32);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1` is never used
[INFO] [stdout]   --> src/structs.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn f1() {
[INFO] [stdout]    |    ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width` and `height` are never read
[INFO] [stdout]   --> src/structs.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct Rectangle {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 40 |     width: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 41 |     height: u32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `area` are never used
[INFO] [stdout]   --> src/structs.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl Rectangle {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 45 |     fn new(width: u32, height: u32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2` is never used
[INFO] [stdout]   --> src/structs.rs:54:4
[INFO] [stdout]    |
[INFO] [stdout] 54 | fn f2() {
[INFO] [stdout]    |    ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.69s
[INFO] running `Command { std: "docker" "inspect" "5b3d506b1aee817c4c2ae8c5afc4ec39266387ba739a92666934b3e315ba8484", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b3d506b1aee817c4c2ae8c5afc4ec39266387ba739a92666934b3e315ba8484", kill_on_drop: false }`
[INFO] [stdout] 5b3d506b1aee817c4c2ae8c5afc4ec39266387ba739a92666934b3e315ba8484