[INFO] cloning repository https://github.com/Abdulkader-Safi/learn_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Abdulkader-Safi/learn_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAbdulkader-Safi%2Flearn_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAbdulkader-Safi%2Flearn_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b9f71e752fc995155055b69bd321d99cc8129d2a
[INFO] checking Abdulkader-Safi/learn_rust against master#32cd9114712a24010b0583624dc52ac302194128 for pr-143717
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAbdulkader-Safi%2Flearn_rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Abdulkader-Safi/learn_rust
[INFO] finished tweaking git repo https://github.com/Abdulkader-Safi/learn_rust
[INFO] tweaked toml for git repo https://github.com/Abdulkader-Safi/learn_rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Abdulkader-Safi/learn_rust on toolchain 32cd9114712a24010b0583624dc52ac302194128
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+32cd9114712a24010b0583624dc52ac302194128" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Abdulkader-Safi/learn_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" "+32cd9114712a24010b0583624dc52ac302194128" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+32cd9114712a24010b0583624dc52ac302194128" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f72ecae0ae53db5e25f6f1b97c377ec38649de8f2b58e499ee1f5ae7d6aa76a2
[INFO] running `Command { std: "docker" "start" "-a" "f72ecae0ae53db5e25f6f1b97c377ec38649de8f2b58e499ee1f5ae7d6aa76a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f72ecae0ae53db5e25f6f1b97c377ec38649de8f2b58e499ee1f5ae7d6aa76a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f72ecae0ae53db5e25f6f1b97c377ec38649de8f2b58e499ee1f5ae7d6aa76a2", kill_on_drop: false }`
[INFO] [stdout] f72ecae0ae53db5e25f6f1b97c377ec38649de8f2b58e499ee1f5ae7d6aa76a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+32cd9114712a24010b0583624dc52ac302194128" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 357b16b58856dc51de928df36c5f0db9575229e1db4551070e364949976ddde3
[INFO] running `Command { std: "docker" "start" "-a" "357b16b58856dc51de928df36c5f0db9575229e1db4551070e364949976ddde3", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_sandbox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> src/owner_ship.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |         let s = String::from("hello"); // s is valid from this point forward
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `get_ownership`
[INFO] [stdout]   --> src/owner_ship.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let get_ownership = gives_ownership();
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_get_ownership`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `take_and_get_ownership`
[INFO] [stdout]   --> src/owner_ship.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let take_and_get_ownership = takes_and_gives_back(String::from("HEllloooo"));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_take_and_get_ownership`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/owner_ship.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let y: i32 = x; // Copy
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> src/owner_ship.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |         let s = String::from("hello"); // s is valid from this point forward
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `get_ownership`
[INFO] [stdout]   --> src/owner_ship.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let get_ownership = gives_ownership();
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_get_ownership`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `take_and_get_ownership`
[INFO] [stdout]   --> src/owner_ship.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let take_and_get_ownership = takes_and_gives_back(String::from("HEllloooo"));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_take_and_get_ownership`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/owner_ship.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let y: i32 = x; // Copy
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "357b16b58856dc51de928df36c5f0db9575229e1db4551070e364949976ddde3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "357b16b58856dc51de928df36c5f0db9575229e1db4551070e364949976ddde3", kill_on_drop: false }`
[INFO] [stdout] 357b16b58856dc51de928df36c5f0db9575229e1db4551070e364949976ddde3
