[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#5de9e0e6cf775e94e0de2003f35e183f3f77bfe8 for pr-143808
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshubham-kanodia%2Flearning-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] 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-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/shubham-kanodia/learning-rust on toolchain 5de9e0e6cf775e94e0de2003f35e183f3f77bfe8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5de9e0e6cf775e94e0de2003f35e183f3f77bfe8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+5de9e0e6cf775e94e0de2003f35e183f3f77bfe8" "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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+5de9e0e6cf775e94e0de2003f35e183f3f77bfe8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8dcc05b7ea1910d9b12be945ead2ff66b3a99de791bfa42c195f283e7fe2f652
[INFO] running `Command { std: "docker" "start" "-a" "8dcc05b7ea1910d9b12be945ead2ff66b3a99de791bfa42c195f283e7fe2f652", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8dcc05b7ea1910d9b12be945ead2ff66b3a99de791bfa42c195f283e7fe2f652", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8dcc05b7ea1910d9b12be945ead2ff66b3a99de791bfa42c195f283e7fe2f652", kill_on_drop: false }`
[INFO] [stdout] 8dcc05b7ea1910d9b12be945ead2ff66b3a99de791bfa42c195f283e7fe2f652
[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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+5de9e0e6cf775e94e0de2003f35e183f3f77bfe8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 06ac99a65dbcbe68e3f3f6a18d457bd708e859668fff818f081dfb665be40ce1
[INFO] running `Command { std: "docker" "start" "-a" "06ac99a65dbcbe68e3f3f6a18d457bd708e859668fff818f081dfb665be40ce1", 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 0.27s
[INFO] running `Command { std: "docker" "inspect" "06ac99a65dbcbe68e3f3f6a18d457bd708e859668fff818f081dfb665be40ce1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06ac99a65dbcbe68e3f3f6a18d457bd708e859668fff818f081dfb665be40ce1", kill_on_drop: false }`
[INFO] [stdout] 06ac99a65dbcbe68e3f3f6a18d457bd708e859668fff818f081dfb665be40ce1