Nov 29 04:11:26.901 INFO checking binary-tree-0.2.0 against try#db42d4dad33013eba11ef37342ad9f614e5652b8 for pr-56074
Nov 29 04:11:26.901 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-4/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56074/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +db42d4dad33013eba11ef37342ad9f614e5652b8-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 29 04:11:27.213 INFO [stdout] c6f5419b9f3104f619f1582830d5afe2860a9b7149c418c09746df8ec45b923d
Nov 29 04:11:27.215 INFO running `"docker" "start" "-a" "c6f5419b9f3104f619f1582830d5afe2860a9b7149c418c09746df8ec45b923d"`
Nov 29 04:11:27.720 INFO [stderr] usermod: no changes
Nov 29 04:11:27.778 INFO [stderr]     Checking binary-tree v0.2.0 (/source)
Nov 29 04:11:31.256 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Nov 29 04:11:31.256 INFO [stderr]   --> benches/from_iter.rs:16:9
Nov 29 04:11:31.257 INFO [stderr]    |
Nov 29 04:11:31.257 INFO [stderr] 16 |         (0..TOTAL).collect::<CountTree<_>>();
Nov 29 04:11:31.257 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 04:11:31.257 INFO [stderr]    |
Nov 29 04:11:31.258 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Nov 29 04:11:31.258 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Nov 29 04:11:31.258 INFO [stderr] 
Nov 29 04:11:31.259 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Nov 29 04:11:31.259 INFO [stderr]   --> benches/from_iter.rs:23:9
Nov 29 04:11:31.259 INFO [stderr]    |
Nov 29 04:11:31.260 INFO [stderr] 23 |         (0..TOTAL).collect::<LinkedList<_>>();
Nov 29 04:11:31.260 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 04:11:31.260 INFO [stderr]    |
Nov 29 04:11:31.260 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Nov 29 04:11:31.261 INFO [stderr] 
Nov 29 04:11:31.261 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Nov 29 04:11:31.262 INFO [stderr]   --> benches/from_iter.rs:30:9
Nov 29 04:11:31.262 INFO [stderr]    |
Nov 29 04:11:31.262 INFO [stderr] 30 |         (0..TOTAL).collect::<Vec<_>>();
Nov 29 04:11:31.262 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 04:11:31.262 INFO [stderr]    |
Nov 29 04:11:31.263 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Nov 29 04:11:31.263 INFO [stderr] 
Nov 29 04:11:31.348 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.60s
Nov 29 04:11:31.364 INFO [stderr] su: No module specific data is present
Nov 29 04:11:32.388 INFO running `"docker" "inspect" "c6f5419b9f3104f619f1582830d5afe2860a9b7149c418c09746df8ec45b923d"`
Nov 29 04:11:32.784 INFO running `"docker" "rm" "-f" "c6f5419b9f3104f619f1582830d5afe2860a9b7149c418c09746df8ec45b923d"`
Nov 29 04:11:32.996 INFO [stdout] c6f5419b9f3104f619f1582830d5afe2860a9b7149c418c09746df8ec45b923d