Dec 12 17:38:51.673 INFO checking binary-tree-0.2.0 against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 12 17:38:51.673 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-7/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/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 +aa9aa79c3c583aab59ac9134542d60a780c35e2e-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"`
Dec 12 17:38:52.020 INFO [stdout] 3be97289b9089f863b26ebccfb810f85bb9e54fcb02f0a58dcd5aa588095f0ea
Dec 12 17:38:52.022 INFO running `"docker" "start" "-a" "3be97289b9089f863b26ebccfb810f85bb9e54fcb02f0a58dcd5aa588095f0ea"`
Dec 12 17:38:52.879 INFO [stderr] usermod: no changes
Dec 12 17:38:52.934 INFO [stderr]     Checking binary-tree v0.2.0 (/source)
Dec 12 17:38:55.000 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 12 17:38:55.000 INFO [stderr]   --> benches/from_iter.rs:16:9
Dec 12 17:38:55.000 INFO [stderr]    |
Dec 12 17:38:55.000 INFO [stderr] 16 |         (0..TOTAL).collect::<CountTree<_>>();
Dec 12 17:38:55.000 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 17:38:55.000 INFO [stderr]    |
Dec 12 17:38:55.000 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 12 17:38:55.000 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 12 17:38:55.000 INFO [stderr] 
Dec 12 17:38:55.000 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 12 17:38:55.000 INFO [stderr]   --> benches/from_iter.rs:23:9
Dec 12 17:38:55.000 INFO [stderr]    |
Dec 12 17:38:55.000 INFO [stderr] 23 |         (0..TOTAL).collect::<LinkedList<_>>();
Dec 12 17:38:55.000 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 17:38:55.000 INFO [stderr]    |
Dec 12 17:38:55.000 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 12 17:38:55.000 INFO [stderr] 
Dec 12 17:38:55.000 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 12 17:38:55.000 INFO [stderr]   --> benches/from_iter.rs:30:9
Dec 12 17:38:55.000 INFO [stderr]    |
Dec 12 17:38:55.000 INFO [stderr] 30 |         (0..TOTAL).collect::<Vec<_>>();
Dec 12 17:38:55.000 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 17:38:55.000 INFO [stderr]    |
Dec 12 17:38:55.000 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 12 17:38:55.000 INFO [stderr] 
Dec 12 17:38:55.754 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.86s
Dec 12 17:38:55.758 INFO [stderr] su: No module specific data is present
Dec 12 17:38:56.100 INFO running `"docker" "inspect" "3be97289b9089f863b26ebccfb810f85bb9e54fcb02f0a58dcd5aa588095f0ea"`
Dec 12 17:38:56.246 INFO running `"docker" "rm" "-f" "3be97289b9089f863b26ebccfb810f85bb9e54fcb02f0a58dcd5aa588095f0ea"`
Dec 12 17:38:56.340 INFO [stdout] 3be97289b9089f863b26ebccfb810f85bb9e54fcb02f0a58dcd5aa588095f0ea