[INFO] cloning repository https://github.com/renyanwu/rust-avltree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/renyanwu/rust-avltree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frenyanwu%2Frust-avltree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frenyanwu%2Frust-avltree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ac2c854de3da6c70211f7b08ba46a82835b5f48d
[INFO] checking renyanwu/rust-avltree against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frenyanwu%2Frust-avltree" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/renyanwu/rust-avltree on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/renyanwu/rust-avltree
[INFO] finished tweaking git repo https://github.com/renyanwu/rust-avltree
[INFO] tweaked toml for git repo https://github.com/renyanwu/rust-avltree written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/renyanwu/rust-avltree already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 74d96d353031ddf5313141567c47b8e4b718b3f1b752e0db3687a017a87f27eb
[INFO] running `Command { std: "docker" "start" "-a" "74d96d353031ddf5313141567c47b8e4b718b3f1b752e0db3687a017a87f27eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "74d96d353031ddf5313141567c47b8e4b718b3f1b752e0db3687a017a87f27eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74d96d353031ddf5313141567c47b8e4b718b3f1b752e0db3687a017a87f27eb", kill_on_drop: false }`
[INFO] [stdout] 74d96d353031ddf5313141567c47b8e4b718b3f1b752e0db3687a017a87f27eb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8d27ec04d98f243392e190b4fc8c796ada86a91212bda0b11254020b6d255c2a
[INFO] running `Command { std: "docker" "start" "-a" "8d27ec04d98f243392e190b4fc8c796ada86a91212bda0b11254020b6d255c2a", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-avltree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io::stdin`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::stdin;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::stdin`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::stdin;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `while let` pattern
[INFO] [stdout]    --> src/main.rs:255:5
[INFO] [stdout]     |
[INFO] [stdout] 255 | /     while let _ = std::io::stdin().read_line(&mut line).unwrap(){
[INFO] [stdout] 256 | |         line = line[0..line.len()-1].to_string();
[INFO] [stdout] 257 | |         let options: Vec<&str> = line.split(' ').collect();
[INFO] [stdout] 258 | |
[INFO] [stdout] ...   |
[INFO] [stdout] 270 | |         line = String::new();
[INFO] [stdout] 271 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout]     = note: this pattern will always match, so the loop will never exit
[INFO] [stdout]     = help: consider instead using a `loop { ... }` with a `let` inside it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `while let` pattern
[INFO] [stdout]    --> src/main.rs:255:5
[INFO] [stdout]     |
[INFO] [stdout] 255 | /     while let _ = std::io::stdin().read_line(&mut line).unwrap(){
[INFO] [stdout] 256 | |         line = line[0..line.len()-1].to_string();
[INFO] [stdout] 257 | |         let options: Vec<&str> = line.split(' ').collect();
[INFO] [stdout] 258 | |
[INFO] [stdout] ...   |
[INFO] [stdout] 270 | |         line = String::new();
[INFO] [stdout] 271 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout]     = note: this pattern will always match, so the loop will never exit
[INFO] [stdout]     = help: consider instead using a `loop { ... }` with a `let` inside it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `Command { std: "docker" "inspect" "8d27ec04d98f243392e190b4fc8c796ada86a91212bda0b11254020b6d255c2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d27ec04d98f243392e190b4fc8c796ada86a91212bda0b11254020b6d255c2a", kill_on_drop: false }`
[INFO] [stdout] 8d27ec04d98f243392e190b4fc8c796ada86a91212bda0b11254020b6d255c2a