Dec 01 01:33:34.821 INFO checking binary-tree-0.2.0 against master#a49316ddc99d9d595193557fc899f6c52e4d9af9 for pr-56323
Dec 01 01:33:34.821 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-6/master#a49316ddc99d9d595193557fc899f6c52e4d9af9:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56323/master#a49316ddc99d9d595193557fc899f6c52e4d9af9:/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 +a49316ddc99d9d595193557fc899f6c52e4d9af9-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 01 01:33:35.212 INFO [stdout] 747f690d022afecf147fd1cc4144f7529c43aa5aecf4dcfd75487150f2abd760
Dec 01 01:33:35.218 INFO running `"docker" "start" "-a" "747f690d022afecf147fd1cc4144f7529c43aa5aecf4dcfd75487150f2abd760"`
Dec 01 01:33:36.408 INFO [stderr] usermod: no changes
Dec 01 01:33:36.522 INFO [stderr]     Checking binary-tree v0.2.0 (/source)
Dec 01 01:33:39.060 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 01 01:33:39.060 INFO [stderr]   --> benches/from_iter.rs:16:9
Dec 01 01:33:39.060 INFO [stderr]    |
Dec 01 01:33:39.060 INFO [stderr] 16 |         (0..TOTAL).collect::<CountTree<_>>();
Dec 01 01:33:39.060 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 01:33:39.060 INFO [stderr]    |
Dec 01 01:33:39.060 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 01 01:33:39.060 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 01 01:33:39.060 INFO [stderr] 
Dec 01 01:33:39.060 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 01 01:33:39.060 INFO [stderr]   --> benches/from_iter.rs:23:9
Dec 01 01:33:39.060 INFO [stderr]    |
Dec 01 01:33:39.060 INFO [stderr] 23 |         (0..TOTAL).collect::<LinkedList<_>>();
Dec 01 01:33:39.060 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 01:33:39.084 INFO [stderr]    |
Dec 01 01:33:39.084 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 01 01:33:39.084 INFO [stderr] 
Dec 01 01:33:39.084 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 01 01:33:39.084 INFO [stderr]   --> benches/from_iter.rs:30:9
Dec 01 01:33:39.084 INFO [stderr]    |
Dec 01 01:33:39.084 INFO [stderr] 30 |         (0..TOTAL).collect::<Vec<_>>();
Dec 01 01:33:39.084 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 01:33:39.084 INFO [stderr]    |
Dec 01 01:33:39.084 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 01 01:33:39.084 INFO [stderr] 
Dec 01 01:33:39.252 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.82s
Dec 01 01:33:39.256 INFO [stderr] su: No module specific data is present
Dec 01 01:33:39.583 INFO running `"docker" "inspect" "747f690d022afecf147fd1cc4144f7529c43aa5aecf4dcfd75487150f2abd760"`
Dec 01 01:33:39.806 INFO running `"docker" "rm" "-f" "747f690d022afecf147fd1cc4144f7529c43aa5aecf4dcfd75487150f2abd760"`
Dec 01 01:33:39.994 INFO [stdout] 747f690d022afecf147fd1cc4144f7529c43aa5aecf4dcfd75487150f2abd760