Dec 17 23:28:27.192 INFO checking gyscos/varf against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 23:28:27.193 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-7/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/gyscos/varf:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 23:28:27.361 INFO [stdout] 48e6f062ef138c49973d58c49faae948092bbb79fe146d0b1319065673ecf7ef
Dec 17 23:28:27.363 INFO running `"docker" "start" "-a" "48e6f062ef138c49973d58c49faae948092bbb79fe146d0b1319065673ecf7ef"`
Dec 17 23:28:28.220 INFO [stderr]     Checking handlebars v0.26.2
Dec 17 23:28:28.225 INFO [stderr]     Checking persistent v0.3.0
Dec 17 23:28:28.225 INFO [stderr]     Checking mount v0.3.0
Dec 17 23:28:28.780 INFO [stderr]     Checking bodyparser v0.5.0
Dec 17 23:28:28.796 INFO [stderr]     Checking staticfile v0.4.0
Dec 17 23:28:29.412 INFO [stderr]     Checking urlencoded v0.5.0
Dec 17 23:28:30.764 INFO [stderr]     Checking handlebars-iron v0.24.1
Dec 17 23:28:31.354 INFO [stderr]     Checking varf v0.1.2 (/opt/crater/workdir)
Dec 17 23:28:32.364 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 17 23:28:32.364 INFO [stderr]   --> src/visu.rs:71:5
Dec 17 23:28:32.364 INFO [stderr]    |
Dec 17 23:28:32.364 INFO [stderr] 71 | /     divs.iter()
Dec 17 23:28:32.364 INFO [stderr] 72 | |         .rev()
Dec 17 23:28:32.364 INFO [stderr] 73 | |         .map(|k| n / k)
Dec 17 23:28:32.364 INFO [stderr] 74 | |         .collect::<Vec<usize>>()
Dec 17 23:28:32.364 INFO [stderr] 75 | |         .iter()
Dec 17 23:28:32.364 INFO [stderr] 76 | |         .map(|k| divs.push(*k))
Dec 17 23:28:32.364 INFO [stderr] 77 | |         .collect::<Vec<()>>();
Dec 17 23:28:32.364 INFO [stderr]    | |______________________________^
Dec 17 23:28:32.364 INFO [stderr]    |
Dec 17 23:28:32.364 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 23:28:32.364 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 17 23:28:32.365 INFO [stderr] 
Dec 17 23:28:32.377 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 17 23:28:32.377 INFO [stderr]   --> src/visu.rs:71:5
Dec 17 23:28:32.377 INFO [stderr]    |
Dec 17 23:28:32.377 INFO [stderr] 71 | /     divs.iter()
Dec 17 23:28:32.377 INFO [stderr] 72 | |         .rev()
Dec 17 23:28:32.377 INFO [stderr] 73 | |         .map(|k| n / k)
Dec 17 23:28:32.377 INFO [stderr] 74 | |         .collect::<Vec<usize>>()
Dec 17 23:28:32.377 INFO [stderr] 75 | |         .iter()
Dec 17 23:28:32.377 INFO [stderr] 76 | |         .map(|k| divs.push(*k))
Dec 17 23:28:32.377 INFO [stderr] 77 | |         .collect::<Vec<()>>();
Dec 17 23:28:32.377 INFO [stderr]    | |______________________________^
Dec 17 23:28:32.377 INFO [stderr]    |
Dec 17 23:28:32.377 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 17 23:28:32.377 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 17 23:28:32.377 INFO [stderr] 
Dec 17 23:28:32.400 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.35s
Dec 17 23:28:32.661 INFO running `"docker" "inspect" "48e6f062ef138c49973d58c49faae948092bbb79fe146d0b1319065673ecf7ef"`
Dec 17 23:28:32.754 INFO running `"docker" "rm" "-f" "48e6f062ef138c49973d58c49faae948092bbb79fe146d0b1319065673ecf7ef"`
Dec 17 23:28:32.855 INFO [stdout] 48e6f062ef138c49973d58c49faae948092bbb79fe146d0b1319065673ecf7ef