[INFO] updating cached repository TechnoCrunch/Rust-Multithreading
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/TechnoCrunch/Rust-Multithreading
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/TechnoCrunch/Rust-Multithreading" "work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/TechnoCrunch/Rust-Multithreading"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/TechnoCrunch/Rust-Multithreading'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/TechnoCrunch/Rust-Multithreading" "work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/TechnoCrunch/Rust-Multithreading"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/TechnoCrunch/Rust-Multithreading'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8356b7529c0b5d574c66ee2fc6198f3a051efb4f
[INFO] sha for GitHub repo TechnoCrunch/Rust-Multithreading: 8356b7529c0b5d574c66ee2fc6198f3a051efb4f
[INFO] validating manifest of TechnoCrunch/Rust-Multithreading on toolchain master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of TechnoCrunch/Rust-Multithreading on toolchain try#58b21121d0b447ceb3f1a655155d802191acf044
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing TechnoCrunch/Rust-Multithreading
[INFO] finished frobbing TechnoCrunch/Rust-Multithreading
[INFO] frobbed toml for TechnoCrunch/Rust-Multithreading written to work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/TechnoCrunch/Rust-Multithreading/Cargo.toml
[INFO] started frobbing TechnoCrunch/Rust-Multithreading
[INFO] finished frobbing TechnoCrunch/Rust-Multithreading
[INFO] frobbed toml for TechnoCrunch/Rust-Multithreading written to work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/TechnoCrunch/Rust-Multithreading/Cargo.toml
[INFO] crate TechnoCrunch/Rust-Multithreading already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] checking TechnoCrunch/Rust-Multithreading against master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504 for pr-61100
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-61100/worker-3/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/TechnoCrunch/Rust-Multithreading:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] ad45560cebfaa620693c5a50e8719c54ca3261ac1bb4bc1f8978f19183a1308f
[INFO] running `"docker" "start" "-a" "ad45560cebfaa620693c5a50e8719c54ca3261ac1bb4bc1f8978f19183a1308f"`
[INFO] [stderr]     Checking multithreads v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::time`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::time;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Cell`, `RefCell`
[INFO] [stderr]  --> src/main.rs:8:17
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::cell::{Cell, RefCell};
[INFO] [stderr]   |                 ^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::time`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::time;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Cell`, `RefCell`
[INFO] [stderr]  --> src/main.rs:8:17
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::cell::{Cell, RefCell};
[INFO] [stderr]   |                 ^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/main.rs:38:17
[INFO] [stderr]    |
[INFO] [stderr] 38 |             let item = thread_items.lock().unwrap();
[INFO] [stderr]    |                 ^^^^ help: consider prefixing with an underscore: `_item`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/main.rs:38:17
[INFO] [stderr]    |
[INFO] [stderr] 38 |             let item = thread_items.lock().unwrap();
[INFO] [stderr]    |                 ^^^^ help: consider prefixing with an underscore: `_item`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `"docker" "inspect" "ad45560cebfaa620693c5a50e8719c54ca3261ac1bb4bc1f8978f19183a1308f"`
[INFO] running `"docker" "rm" "-f" "ad45560cebfaa620693c5a50e8719c54ca3261ac1bb4bc1f8978f19183a1308f"`
[INFO] [stdout] ad45560cebfaa620693c5a50e8719c54ca3261ac1bb4bc1f8978f19183a1308f