Dec 18 18:12:41.785 INFO checking binary-tree-0.2.0 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 18:12:41.785 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/binary-tree/0.2.0:/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 18:12:41.996 INFO [stdout] b0f0c3b1669b09f9b12747b77f828b819625c61482e4fbb08a6a0b5c2f19bf7e
Dec 18 18:12:41.996 INFO running `"docker" "start" "-a" "b0f0c3b1669b09f9b12747b77f828b819625c61482e4fbb08a6a0b5c2f19bf7e"`
Dec 18 18:12:42.618 INFO [stderr]     Checking binary-tree v0.2.0 (/opt/crater/workdir)
Dec 18 18:12:44.024 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 18 18:12:44.024 INFO [stderr]   --> benches/from_iter.rs:16:9
Dec 18 18:12:44.024 INFO [stderr]    |
Dec 18 18:12:44.024 INFO [stderr] 16 |         (0..TOTAL).collect::<CountTree<_>>();
Dec 18 18:12:44.024 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 18:12:44.024 INFO [stderr]    |
Dec 18 18:12:44.024 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 18:12:44.024 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 18 18:12:44.024 INFO [stderr] 
Dec 18 18:12:44.024 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 18 18:12:44.024 INFO [stderr]   --> benches/from_iter.rs:23:9
Dec 18 18:12:44.024 INFO [stderr]    |
Dec 18 18:12:44.024 INFO [stderr] 23 |         (0..TOTAL).collect::<LinkedList<_>>();
Dec 18 18:12:44.024 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 18:12:44.024 INFO [stderr]    |
Dec 18 18:12:44.024 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 18 18:12:44.024 INFO [stderr] 
Dec 18 18:12:44.024 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 18 18:12:44.024 INFO [stderr]   --> benches/from_iter.rs:30:9
Dec 18 18:12:44.024 INFO [stderr]    |
Dec 18 18:12:44.024 INFO [stderr] 30 |         (0..TOTAL).collect::<Vec<_>>();
Dec 18 18:12:44.024 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 18:12:44.024 INFO [stderr]    |
Dec 18 18:12:44.024 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 18 18:12:44.025 INFO [stderr] 
Dec 18 18:12:44.300 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.71s
Dec 18 18:12:44.642 INFO running `"docker" "inspect" "b0f0c3b1669b09f9b12747b77f828b819625c61482e4fbb08a6a0b5c2f19bf7e"`
Dec 18 18:12:44.853 INFO running `"docker" "rm" "-f" "b0f0c3b1669b09f9b12747b77f828b819625c61482e4fbb08a6a0b5c2f19bf7e"`
Dec 18 18:12:44.969 INFO [stdout] b0f0c3b1669b09f9b12747b77f828b819625c61482e4fbb08a6a0b5c2f19bf7e