[INFO] cloning repository https://github.com/shubham-kanodia/learning-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shubham-kanodia/learning-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshubham-kanodia%2Flearning-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshubham-kanodia%2Flearning-rust'...
[INFO] [stderr] /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshubham-kanodia%2Flearning-rust: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 1)
[INFO] cloning repository https://github.com/shubham-kanodia/learning-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shubham-kanodia/learning-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshubham-kanodia%2Flearning-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshubham-kanodia%2Flearning-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9b230400e9a0e5ae77f010c0caa76d3f39323428
[INFO] checking shubham-kanodia/learning-rust against try#15e8bc6907ab2b3623cb52acc726f4787458df64 for pr-141352
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshubham-kanodia%2Flearning-rust" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shubham-kanodia/learning-rust on toolchain 15e8bc6907ab2b3623cb52acc726f4787458df64
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+15e8bc6907ab2b3623cb52acc726f4787458df64" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shubham-kanodia/learning-rust
[INFO] finished tweaking git repo https://github.com/shubham-kanodia/learning-rust
[INFO] tweaked toml for git repo https://github.com/shubham-kanodia/learning-rust written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/shubham-kanodia/learning-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" "+15e8bc6907ab2b3623cb52acc726f4787458df64" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+15e8bc6907ab2b3623cb52acc726f4787458df64" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 215c51f0757eba7fc11e4fbea5f924639d02132b60fad68ef0e6d0d6110a8a51
[INFO] running `Command { std: "docker" "start" "-a" "215c51f0757eba7fc11e4fbea5f924639d02132b60fad68ef0e6d0d6110a8a51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "215c51f0757eba7fc11e4fbea5f924639d02132b60fad68ef0e6d0d6110a8a51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "215c51f0757eba7fc11e4fbea5f924639d02132b60fad68ef0e6d0d6110a8a51", kill_on_drop: false }`
[INFO] [stdout] 215c51f0757eba7fc11e4fbea5f924639d02132b60fad68ef0e6d0d6110a8a51
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+15e8bc6907ab2b3623cb52acc726f4787458df64" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2afebf17471818fb21775e97d1df1b302fc6debb8a607f7878961a0c4935f739
[INFO] running `Command { std: "docker" "start" "-a" "2afebf17471818fb21775e97d1df1b302fc6debb8a607f7878961a0c4935f739", kill_on_drop: false }`
[INFO] [stderr]     Checking learning-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/challenges/challenge1_a.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn solve() -> i32 {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/challenges/challenge1_b.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn solve() -> i32 {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Position` is never constructed
[INFO] [stdout]  --> src/challenges/challenge2_a.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Position {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/challenges/challenge2_a.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn solve() -> (i32, i32){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Position` is never constructed
[INFO] [stdout]  --> src/challenges/challenge2_b.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Position {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/challenges/challenge2_b.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn solve() -> (i32, i32){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_most_frequent_bit` is never used
[INFO] [stdout]  --> src/challenges/challenge3_a.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn get_most_frequent_bit(bits: Vec<char>) -> (char, char) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]   --> src/challenges/challenge3_a.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn solve() -> (i32, i32) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/challenges/challenge1_a.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn solve() -> i32 {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/challenges/challenge1_b.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn solve() -> i32 {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Position` is never constructed
[INFO] [stdout]  --> src/challenges/challenge2_a.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Position {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/challenges/challenge2_a.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn solve() -> (i32, i32){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Position` is never constructed
[INFO] [stdout]  --> src/challenges/challenge2_b.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Position {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/challenges/challenge2_b.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn solve() -> (i32, i32){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_most_frequent_bit` is never used
[INFO] [stdout]  --> src/challenges/challenge3_a.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn get_most_frequent_bit(bits: Vec<char>) -> (char, char) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]   --> src/challenges/challenge3_a.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn solve() -> (i32, i32) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "2afebf17471818fb21775e97d1df1b302fc6debb8a607f7878961a0c4935f739", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2afebf17471818fb21775e97d1df1b302fc6debb8a607f7878961a0c4935f739", kill_on_drop: false }`
[INFO] [stdout] 2afebf17471818fb21775e97d1df1b302fc6debb8a607f7878961a0c4935f739