[INFO] cloning repository https://github.com/k-shar/rust_learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/k-shar/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fk-shar%2Frust_learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fk-shar%2Frust_learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3baf1f7e46806b448f8293b4d0df6643ef50e0ef
[INFO] checking k-shar/rust_learning against master#49b3924bd4a34d3cf9c37b74120fba78d9712ab8 for pr-118247
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fk-shar%2Frust_learning" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/k-shar/rust_learning on toolchain 49b3924bd4a34d3cf9c37b74120fba78d9712ab8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+49b3924bd4a34d3cf9c37b74120fba78d9712ab8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/k-shar/rust_learning
[INFO] finished tweaking git repo https://github.com/k-shar/rust_learning
[INFO] tweaked toml for git repo https://github.com/k-shar/rust_learning written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/k-shar/rust_learning 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" "+49b3924bd4a34d3cf9c37b74120fba78d9712ab8" "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
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking k-shar/rust_learning against try#ab2dc84cfc2c30bb279a7cd2bfef172c30260142 for pr-118247
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fk-shar%2Frust_learning" "/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/k-shar/rust_learning on toolchain ab2dc84cfc2c30bb279a7cd2bfef172c30260142
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab2dc84cfc2c30bb279a7cd2bfef172c30260142" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/k-shar/rust_learning
[INFO] finished tweaking git repo https://github.com/k-shar/rust_learning
[INFO] tweaked toml for git repo https://github.com/k-shar/rust_learning written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/k-shar/rust_learning 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" "+ab2dc84cfc2c30bb279a7cd2bfef172c30260142" "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-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ab2dc84cfc2c30bb279a7cd2bfef172c30260142" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b58012658adc1eba0719a0ff9a5460eb3b8a1cf7f4fc82b4cbe3bf7a47f4c5bb
[INFO] running `Command { std: "docker" "start" "-a" "b58012658adc1eba0719a0ff9a5460eb3b8a1cf7f4fc82b4cbe3bf7a47f4c5bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b58012658adc1eba0719a0ff9a5460eb3b8a1cf7f4fc82b4cbe3bf7a47f4c5bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b58012658adc1eba0719a0ff9a5460eb3b8a1cf7f4fc82b4cbe3bf7a47f4c5bb", kill_on_drop: false }`
[INFO] [stdout] b58012658adc1eba0719a0ff9a5460eb3b8a1cf7f4fc82b4cbe3bf7a47f4c5bb
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ab2dc84cfc2c30bb279a7cd2bfef172c30260142" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 491bcc6fa2ae6ecaa30eb42ea8e05812fae8ad5e4d9bb4e7fb05da8c81016406
[INFO] running `Command { std: "docker" "start" "-a" "491bcc6fa2ae6ecaa30eb42ea8e05812fae8ad5e4d9bb4e7fb05da8c81016406", kill_on_drop: false }`
[INFO] [stderr]     Checking rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `fib` is never used
[INFO] [stdout]  --> src/fib.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn fib(x: i32) -> i32 {
[INFO] [stdout]   |    ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ask_for_fib` is never used
[INFO] [stdout]   --> src/fib.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn ask_for_fib() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/fib.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/christmas.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn main(){
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `GIFTS` is never used
[INFO] [stdout]   --> src/christmas.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | static GIFTS: [&str; 12] = 
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `DAYS` is never used
[INFO] [stdout]   --> src/christmas.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | static DAYS: [&str; 12] = 
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `area` is never used
[INFO] [stdout]  --> src/rectangle.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | impl Rect {
[INFO] [stdout]   | --------- method in this implementation
[INFO] [stdout] 7 |     fn area(&self) -> u32{
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fib` is never used
[INFO] [stdout]  --> src/fib.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn fib(x: i32) -> i32 {
[INFO] [stdout]   |    ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ask_for_fib` is never used
[INFO] [stdout]   --> src/fib.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn ask_for_fib() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/fib.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/christmas.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn main(){
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `GIFTS` is never used
[INFO] [stdout]   --> src/christmas.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | static GIFTS: [&str; 12] = 
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `DAYS` is never used
[INFO] [stdout]   --> src/christmas.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | static DAYS: [&str; 12] = 
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `area` is never used
[INFO] [stdout]  --> src/rectangle.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | impl Rect {
[INFO] [stdout]   | --------- method in this implementation
[INFO] [stdout] 7 |     fn area(&self) -> u32{
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `Command { std: "docker" "inspect" "491bcc6fa2ae6ecaa30eb42ea8e05812fae8ad5e4d9bb4e7fb05da8c81016406", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "491bcc6fa2ae6ecaa30eb42ea8e05812fae8ad5e4d9bb4e7fb05da8c81016406", kill_on_drop: false }`
[INFO] [stdout] 491bcc6fa2ae6ecaa30eb42ea8e05812fae8ad5e4d9bb4e7fb05da8c81016406