[INFO] updating cached repository https://github.com/renyanwu/rust-avltree
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ac2c854de3da6c70211f7b08ba46a82835b5f48d
[INFO] checking renyanwu/rust-avltree against master#eaa02f599f651246d5d1b99e7a4c6fa8d04bc9dc for pr-69560
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frenyanwu%2Frust-avltree" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/renyanwu/rust-avltree on toolchain eaa02f599f651246d5d1b99e7a4c6fa8d04bc9dc
[INFO] running `"/workspace/cargo-home/bin/cargo" "+eaa02f599f651246d5d1b99e7a4c6fa8d04bc9dc" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-1/source/Cargo.toml
[INFO] crate git repo https://github.com/renyanwu/rust-avltree already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+eaa02f599f651246d5d1b99e7a4c6fa8d04bc9dc" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+eaa02f599f651246d5d1b99e7a4c6fa8d04bc9dc" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 1acddf1888a5b1319db0fe6e1ef0aa9eca49e2a15a201d4a3853aea8f0653cba
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "1acddf1888a5b1319db0fe6e1ef0aa9eca49e2a15a201d4a3853aea8f0653cba"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rust-avltree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::io::stdin`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::stdin;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::stdin`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::stdin;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: irrefutable while-let pattern
[INFO] [stderr]    --> src/main.rs:255:5
[INFO] [stderr]     |
[INFO] [stderr] 255 | /     while let _ = std::io::stdin().read_line(&mut line).unwrap(){
[INFO] [stderr] 256 | |         line = line[0..line.len()-1].to_string();
[INFO] [stderr] 257 | |         let options: Vec<&str> = line.split(' ').collect();
[INFO] [stderr] 258 | |
[INFO] [stderr] ...   |
[INFO] [stderr] 270 | |         line = String::new();
[INFO] [stderr] 271 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: irrefutable while-let pattern
[INFO] [stderr]    --> src/main.rs:255:5
[INFO] [stderr]     |
[INFO] [stderr] 255 | /     while let _ = std::io::stdin().read_line(&mut line).unwrap(){
[INFO] [stderr] 256 | |         line = line[0..line.len()-1].to_string();
[INFO] [stderr] 257 | |         let options: Vec<&str> = line.split(' ').collect();
[INFO] [stderr] 258 | |
[INFO] [stderr] ...   |
[INFO] [stderr] 270 | |         line = String::new();
[INFO] [stderr] 271 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `"docker" "inspect" "1acddf1888a5b1319db0fe6e1ef0aa9eca49e2a15a201d4a3853aea8f0653cba"`
[INFO] running `"docker" "rm" "-f" "1acddf1888a5b1319db0fe6e1ef0aa9eca49e2a15a201d4a3853aea8f0653cba"`
[INFO] [stdout] 1acddf1888a5b1319db0fe6e1ef0aa9eca49e2a15a201d4a3853aea8f0653cba