Dec 18 02:09:30.307 INFO checking cowang4/rusty_primes against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 02:09:30.307 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/cowang4/rusty_primes:/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 18 02:09:30.777 INFO [stdout] 977b0cb66319fb100580c101f389e7c0e9a8d957d64b8701cc3d86a142d001b7
Dec 18 02:09:30.784 INFO running `"docker" "start" "-a" "977b0cb66319fb100580c101f389e7c0e9a8d957d64b8701cc3d86a142d001b7"`
Dec 18 02:09:32.424 INFO [stderr]     Checking rusty_primes v0.1.0 (/opt/crater/workdir)
Dec 18 02:09:32.736 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 18 02:09:32.736 INFO [stderr]   --> src/main.rs:14:9
Dec 18 02:09:32.736 INFO [stderr]    |
Dec 18 02:09:32.736 INFO [stderr] 14 | /         ((i*i)..n)
Dec 18 02:09:32.736 INFO [stderr] 15 | |             .step_by(i)
Dec 18 02:09:32.736 INFO [stderr] 16 | |             .map(|i| primes[i] = false)
Dec 18 02:09:32.736 INFO [stderr] 17 | |             .collect::<()>();
Dec 18 02:09:32.736 INFO [stderr]    | |_____________________________^
Dec 18 02:09:32.736 INFO [stderr]    |
Dec 18 02:09:32.736 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 02:09:32.736 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 18 02:09:32.736 INFO [stderr] 
Dec 18 02:09:32.736 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 18 02:09:32.736 INFO [stderr]   --> src/main.rs:30:5
Dec 18 02:09:32.736 INFO [stderr]    |
Dec 18 02:09:32.736 INFO [stderr] 30 | /     primes
Dec 18 02:09:32.736 INFO [stderr] 31 | |         .iter()
Dec 18 02:09:32.736 INFO [stderr] 32 | |         .map(|i| println!("{}", i))
Dec 18 02:09:32.736 INFO [stderr] 33 | |         .collect::<()>();
Dec 18 02:09:32.736 INFO [stderr]    | |_________________________^
Dec 18 02:09:32.736 INFO [stderr]    |
Dec 18 02:09:32.736 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 18 02:09:32.736 INFO [stderr] 
Dec 18 02:09:32.768 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 18 02:09:32.768 INFO [stderr]   --> src/main.rs:14:9
Dec 18 02:09:32.768 INFO [stderr]    |
Dec 18 02:09:32.768 INFO [stderr] 14 | /         ((i*i)..n)
Dec 18 02:09:32.768 INFO [stderr] 15 | |             .step_by(i)
Dec 18 02:09:32.768 INFO [stderr] 16 | |             .map(|i| primes[i] = false)
Dec 18 02:09:32.768 INFO [stderr] 17 | |             .collect::<()>();
Dec 18 02:09:32.768 INFO [stderr]    | |_____________________________^
Dec 18 02:09:32.768 INFO [stderr]    |
Dec 18 02:09:32.768 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 02:09:32.768 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 18 02:09:32.768 INFO [stderr] 
Dec 18 02:09:32.768 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 18 02:09:32.768 INFO [stderr]   --> src/main.rs:30:5
Dec 18 02:09:32.768 INFO [stderr]    |
Dec 18 02:09:32.769 INFO [stderr] 30 | /     primes
Dec 18 02:09:32.769 INFO [stderr] 31 | |         .iter()
Dec 18 02:09:32.769 INFO [stderr] 32 | |         .map(|i| println!("{}", i))
Dec 18 02:09:32.769 INFO [stderr] 33 | |         .collect::<()>();
Dec 18 02:09:32.769 INFO [stderr]    | |_________________________^
Dec 18 02:09:32.769 INFO [stderr]    |
Dec 18 02:09:32.769 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 18 02:09:32.769 INFO [stderr] 
Dec 18 02:09:32.793 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.39s
Dec 18 02:09:33.490 INFO running `"docker" "inspect" "977b0cb66319fb100580c101f389e7c0e9a8d957d64b8701cc3d86a142d001b7"`
Dec 18 02:09:33.724 INFO running `"docker" "rm" "-f" "977b0cb66319fb100580c101f389e7c0e9a8d957d64b8701cc3d86a142d001b7"`
Dec 18 02:09:33.881 INFO [stdout] 977b0cb66319fb100580c101f389e7c0e9a8d957d64b8701cc3d86a142d001b7