[INFO] cloning repository https://github.com/JkrishnaD/rust-learnings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JkrishnaD/rust-learnings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJkrishnaD%2Frust-learnings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJkrishnaD%2Frust-learnings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3075c9eeb337b52ee79d205b2e39081bd81a7cfa
[INFO] checking JkrishnaD/rust-learnings against try#2b39fe756f52bc2825bf5b2bfc385cab922dae10 for pr-143011
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJkrishnaD%2Frust-learnings" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/JkrishnaD/rust-learnings
[INFO] finished tweaking git repo https://github.com/JkrishnaD/rust-learnings
[INFO] tweaked toml for git repo https://github.com/JkrishnaD/rust-learnings written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/JkrishnaD/rust-learnings on toolchain 2b39fe756f52bc2825bf5b2bfc385cab922dae10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/JkrishnaD/rust-learnings 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" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking JkrishnaD/rust-learnings against try#2b39fe756f52bc2825bf5b2bfc385cab922dae10 for pr-143011
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJkrishnaD%2Frust-learnings" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/JkrishnaD/rust-learnings
[INFO] finished tweaking git repo https://github.com/JkrishnaD/rust-learnings
[INFO] tweaked toml for git repo https://github.com/JkrishnaD/rust-learnings written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/JkrishnaD/rust-learnings on toolchain 2b39fe756f52bc2825bf5b2bfc385cab922dae10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/JkrishnaD/rust-learnings 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" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "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
[INFO] checking JkrishnaD/rust-learnings against try#2b39fe756f52bc2825bf5b2bfc385cab922dae10 for pr-143011
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJkrishnaD%2Frust-learnings" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/JkrishnaD/rust-learnings
[INFO] finished tweaking git repo https://github.com/JkrishnaD/rust-learnings
[INFO] tweaked toml for git repo https://github.com/JkrishnaD/rust-learnings written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/JkrishnaD/rust-learnings on toolchain 2b39fe756f52bc2825bf5b2bfc385cab922dae10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/JkrishnaD/rust-learnings 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" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "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
[INFO] checking JkrishnaD/rust-learnings against try#2b39fe756f52bc2825bf5b2bfc385cab922dae10 for pr-143011
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJkrishnaD%2Frust-learnings" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/JkrishnaD/rust-learnings
[INFO] finished tweaking git repo https://github.com/JkrishnaD/rust-learnings
[INFO] tweaked toml for git repo https://github.com/JkrishnaD/rust-learnings written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/JkrishnaD/rust-learnings on toolchain 2b39fe756f52bc2825bf5b2bfc385cab922dae10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/JkrishnaD/rust-learnings 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" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 304ec72a23437d464a418aecbc86dcbc6e3b0c93f2f83dffe6ac8e35c3759b65
[INFO] running `Command { std: "docker" "start" "-a" "304ec72a23437d464a418aecbc86dcbc6e3b0c93f2f83dffe6ac8e35c3759b65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "304ec72a23437d464a418aecbc86dcbc6e3b0c93f2f83dffe6ac8e35c3759b65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "304ec72a23437d464a418aecbc86dcbc6e3b0c93f2f83dffe6ac8e35c3759b65", kill_on_drop: false }`
[INFO] [stdout] 304ec72a23437d464a418aecbc86dcbc6e3b0c93f2f83dffe6ac8e35c3759b65
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4ed2b5aa81e5417d839eb29732ebd32eb5bb24da3db06f5f5866c98ba94b97a3
[INFO] running `Command { std: "docker" "start" "-a" "4ed2b5aa81e5417d839eb29732ebd32eb5bb24da3db06f5f5866c98ba94b97a3", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-project v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `result`
[INFO] [stdout]  --> src/main.rs:1:38
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{ collections::HashMap, fs, result, sync::mpsc, thread::{ self, spawn } };
[INFO] [stdout]   |                                      ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `result`
[INFO] [stdout]  --> src/main.rs:1:38
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{ collections::HashMap, fs, result, sync::mpsc, thread::{ self, spawn } };
[INFO] [stdout]   |                                      ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_direction`
[INFO] [stdout]    --> src/main.rs:159:9
[INFO] [stdout]     |
[INFO] [stdout] 159 |     let my_direction = Directions::North;
[INFO] [stdout]     |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_direction`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `jaya`
[INFO] [stdout]    --> src/main.rs:243:9
[INFO] [stdout]     |
[INFO] [stdout] 243 |     let jaya = "jaya"; // it directly pointing to the binary
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_jaya`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_direction`
[INFO] [stdout]    --> src/main.rs:159:9
[INFO] [stdout]     |
[INFO] [stdout] 159 |     let my_direction = Directions::North;
[INFO] [stdout]     |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_direction`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `jaya`
[INFO] [stdout]    --> src/main.rs:243:9
[INFO] [stdout]     |
[INFO] [stdout] 243 |     let jaya = "jaya"; // it directly pointing to the binary
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_jaya`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `South`, `East`, and `West` are never constructed
[INFO] [stdout]   --> src/main.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | enum Directions {
[INFO] [stdout]    |      ---------- variants in this enum
[INFO] [stdout] 23 |     North,
[INFO] [stdout] 24 |     South,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 25 |     East,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 26 |     West,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_string` is never used
[INFO] [stdout]    --> src/main.rs:412:4
[INFO] [stdout]     |
[INFO] [stdout] 412 | fn longest_string<'a>(first: &'a str, second: &'a str) -> &'a str {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `South`, `East`, and `West` are never constructed
[INFO] [stdout]   --> src/main.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | enum Directions {
[INFO] [stdout]    |      ---------- variants in this enum
[INFO] [stdout] 23 |     North,
[INFO] [stdout] 24 |     South,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 25 |     East,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 26 |     West,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_string` is never used
[INFO] [stdout]    --> src/main.rs:412:4
[INFO] [stdout]     |
[INFO] [stdout] 412 | fn longest_string<'a>(first: &'a str, second: &'a str) -> &'a str {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] running `Command { std: "docker" "inspect" "4ed2b5aa81e5417d839eb29732ebd32eb5bb24da3db06f5f5866c98ba94b97a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ed2b5aa81e5417d839eb29732ebd32eb5bb24da3db06f5f5866c98ba94b97a3", kill_on_drop: false }`
[INFO] [stdout] 4ed2b5aa81e5417d839eb29732ebd32eb5bb24da3db06f5f5866c98ba94b97a3