[INFO] cloning repository https://github.com/iMiebaka/intro-to-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iMiebaka/intro-to-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FiMiebaka%2Fintro-to-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FiMiebaka%2Fintro-to-rust'...
[INFO] [stderr] error: unable to write symref for HEAD: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 1)
[INFO] cloning repository https://github.com/iMiebaka/intro-to-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iMiebaka/intro-to-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FiMiebaka%2Fintro-to-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FiMiebaka%2Fintro-to-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7c26a5516bdab7f35afd8d37ba5be14ae876cd15
[INFO] checking iMiebaka/intro-to-rust against master#ecb170afc878648c3ae355dbd596c8e4b6f7ebdc for pr-139022
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FiMiebaka%2Fintro-to-rust" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/iMiebaka/intro-to-rust on toolchain ecb170afc878648c3ae355dbd596c8e4b6f7ebdc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ecb170afc878648c3ae355dbd596c8e4b6f7ebdc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/iMiebaka/intro-to-rust
[INFO] finished tweaking git repo https://github.com/iMiebaka/intro-to-rust
[INFO] tweaked toml for git repo https://github.com/iMiebaka/intro-to-rust written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/iMiebaka/intro-to-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" "+ecb170afc878648c3ae355dbd596c8e4b6f7ebdc" "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-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+ecb170afc878648c3ae355dbd596c8e4b6f7ebdc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a0ec424ef16046ba334271cd9a263babcee8de1c926cfe73652b7ca9fab0e30e
[INFO] running `Command { std: "docker" "start" "-a" "a0ec424ef16046ba334271cd9a263babcee8de1c926cfe73652b7ca9fab0e30e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a0ec424ef16046ba334271cd9a263babcee8de1c926cfe73652b7ca9fab0e30e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0ec424ef16046ba334271cd9a263babcee8de1c926cfe73652b7ca9fab0e30e", kill_on_drop: false }`
[INFO] [stdout] a0ec424ef16046ba334271cd9a263babcee8de1c926cfe73652b7ca9fab0e30e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+ecb170afc878648c3ae355dbd596c8e4b6f7ebdc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 488796ddf7fd75609f2e19f70aa84de970b59542650d64046e5effd873f8166a
[INFO] running `Command { std: "docker" "start" "-a" "488796ddf7fd75609f2e19f70aa84de970b59542650d64046e5effd873f8166a", kill_on_drop: false }`
[INFO] [stderr]     Checking smawk v0.3.2
[INFO] [stderr]     Checking unicode-width v0.1.13
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]     Checking textwrap v0.13.4
[INFO] [stderr]     Checking ferris-says v0.3.1
[INFO] [stderr]     Checking hello-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/basics/mod.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn main(){
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `greeting` is never used
[INFO] [stdout]  --> src/basics/variables.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn greeting() -> &'static str {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `greet` is never used
[INFO] [stdout]   --> src/basics/variables.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn greet(name: &str) -> String {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string_expresso` is never used
[INFO] [stdout]   --> src/basics/variables.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn string_expresso() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `let_sum_number` is never used
[INFO] [stdout]   --> src/basics/variables.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn let_sum_number(a: i8, b: i8) -> i8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `var_mutation` is never used
[INFO] [stdout]   --> src/basics/variables.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn var_mutation() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `literal_operators` is never used
[INFO] [stdout]   --> src/basics/variables.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn literal_operators() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tups` is never used
[INFO] [stdout]   --> src/basics/variables.rs:94:8
[INFO] [stdout]    |
[INFO] [stdout] 94 | pub fn tups() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `analyze_slice` is never used
[INFO] [stdout]    --> src/basics/variables.rs:114:4
[INFO] [stdout]     |
[INFO] [stdout] 114 | fn analyze_slice(slice: &[u32]) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `arrays` is never used
[INFO] [stdout]    --> src/basics/variables.rs:119:8
[INFO] [stdout]     |
[INFO] [stdout] 119 | pub fn arrays() {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Name` is never constructed
[INFO] [stdout]  --> src/basics/custom_type.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Name {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `WebEvent` is never used
[INFO] [stdout]  --> src/basics/custom_type.rs:9:6
[INFO] [stdout]   |
[INFO] [stdout] 9 | enum WebEvent {
[INFO] [stdout]   |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `the_struct` is never used
[INFO] [stdout]   --> src/basics/custom_type.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn the_struct(){
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enum_inspect` is never used
[INFO] [stdout]   --> src/basics/custom_type.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn enum_inspect(event: WebEvent) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `the_enum` is never used
[INFO] [stdout]   --> src/basics/custom_type.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn the_enum() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `VeryVerboseEnumOfThingsToDoWithNumbers` is never used
[INFO] [stdout]   --> src/basics/custom_type.rs:68:6
[INFO] [stdout]    |
[INFO] [stdout] 68 | enum VeryVerboseEnumOfThingsToDoWithNumbers {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `run` is never used
[INFO] [stdout]   --> src/basics/custom_type.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | impl VeryVerboseEnumOfThingsToDoWithNumbers {
[INFO] [stdout]    | ------------------------------------------- method in this implementation
[INFO] [stdout] 74 |     fn run(&self, x: i32, y: i32) -> i32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/basics/custom_type.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 81 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `if_statement` is never used
[INFO] [stdout]  --> src/basics/control_flow.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn if_statement(number: i32) -> &'static str {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `if_else_expression` is never used
[INFO] [stdout]  --> src/basics/control_flow.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn if_else_expression() -> &'static str {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/loops/while_snip.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn main(){
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/basics/mod.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn main(){
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string_expresso` is never used
[INFO] [stdout]   --> src/basics/variables.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn string_expresso() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `var_mutation` is never used
[INFO] [stdout]   --> src/basics/variables.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn var_mutation() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `literal_operators` is never used
[INFO] [stdout]   --> src/basics/variables.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn literal_operators() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tups` is never used
[INFO] [stdout]   --> src/basics/variables.rs:94:8
[INFO] [stdout]    |
[INFO] [stdout] 94 | pub fn tups() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `analyze_slice` is never used
[INFO] [stdout]    --> src/basics/variables.rs:114:4
[INFO] [stdout]     |
[INFO] [stdout] 114 | fn analyze_slice(slice: &[u32]) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `arrays` is never used
[INFO] [stdout]    --> src/basics/variables.rs:119:8
[INFO] [stdout]     |
[INFO] [stdout] 119 | pub fn arrays() {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Name` is never constructed
[INFO] [stdout]  --> src/basics/custom_type.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Name {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `WebEvent` is never used
[INFO] [stdout]  --> src/basics/custom_type.rs:9:6
[INFO] [stdout]   |
[INFO] [stdout] 9 | enum WebEvent {
[INFO] [stdout]   |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `the_struct` is never used
[INFO] [stdout]   --> src/basics/custom_type.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn the_struct(){
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enum_inspect` is never used
[INFO] [stdout]   --> src/basics/custom_type.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn enum_inspect(event: WebEvent) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `the_enum` is never used
[INFO] [stdout]   --> src/basics/custom_type.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn the_enum() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `VeryVerboseEnumOfThingsToDoWithNumbers` is never used
[INFO] [stdout]   --> src/basics/custom_type.rs:68:6
[INFO] [stdout]    |
[INFO] [stdout] 68 | enum VeryVerboseEnumOfThingsToDoWithNumbers {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `run` is never used
[INFO] [stdout]   --> src/basics/custom_type.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | impl VeryVerboseEnumOfThingsToDoWithNumbers {
[INFO] [stdout]    | ------------------------------------------- method in this implementation
[INFO] [stdout] 74 |     fn run(&self, x: i32, y: i32) -> i32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/basics/custom_type.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 81 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/loops/while_snip.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn main(){
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `Command { std: "docker" "inspect" "488796ddf7fd75609f2e19f70aa84de970b59542650d64046e5effd873f8166a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "488796ddf7fd75609f2e19f70aa84de970b59542650d64046e5effd873f8166a", kill_on_drop: false }`
[INFO] [stdout] 488796ddf7fd75609f2e19f70aa84de970b59542650d64046e5effd873f8166a