Nov 28 23:30:06.479 INFO checking immutable-0.1.1 against try#db42d4dad33013eba11ef37342ad9f614e5652b8 for pr-56074
Nov 28 23:30:06.479 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-0/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/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 28 23:30:06.667 INFO [stdout] b801878e676c7df77b16a99da8f731b06e2ed240d36a75df880b1c882b57c080
Nov 28 23:30:06.670 INFO running `"docker" "start" "-a" "b801878e676c7df77b16a99da8f731b06e2ed240d36a75df880b1c882b57c080"`
Nov 28 23:30:07.131 INFO [stderr] usermod: no changes
Nov 28 23:30:07.157 INFO [stderr]     Checking immutable v0.1.1 (/source)
Nov 28 23:30:07.608 INFO [stderr] warning: unused import: `std::vec::IntoIter`
Nov 28 23:30:07.608 INFO [stderr]  --> src/list.rs:7:5
Nov 28 23:30:07.608 INFO [stderr]   |
Nov 28 23:30:07.608 INFO [stderr] 7 | use std::vec::IntoIter;
Nov 28 23:30:07.608 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Nov 28 23:30:07.608 INFO [stderr]   |
Nov 28 23:30:07.608 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 28 23:30:07.608 INFO [stderr] 
Nov 28 23:30:07.716 INFO [stderr] warning: unused import: `std::vec::IntoIter`
Nov 28 23:30:07.716 INFO [stderr]  --> src/list.rs:7:5
Nov 28 23:30:07.716 INFO [stderr]   |
Nov 28 23:30:07.716 INFO [stderr] 7 | use std::vec::IntoIter;
Nov 28 23:30:07.716 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Nov 28 23:30:07.716 INFO [stderr]   |
Nov 28 23:30:07.716 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 28 23:30:07.716 INFO [stderr] 
Nov 28 23:30:07.808 INFO [stderr] warning: unused attribute
Nov 28 23:30:07.808 INFO [stderr]  --> src/list.rs:9:1
Nov 28 23:30:07.808 INFO [stderr]   |
Nov 28 23:30:07.808 INFO [stderr] 9 | #[macro_escape]
Nov 28 23:30:07.808 INFO [stderr]   | ^^^^^^^^^^^^^^^
Nov 28 23:30:07.808 INFO [stderr]   |
Nov 28 23:30:07.808 INFO [stderr]   = note: #[warn(unused_attributes)] on by default
Nov 28 23:30:07.808 INFO [stderr] 
Nov 28 23:30:07.808 INFO [stderr] warning: unused attribute
Nov 28 23:30:07.808 INFO [stderr]   --> src/tree/binary_tree.rs:11:1
Nov 28 23:30:07.808 INFO [stderr]    |
Nov 28 23:30:07.808 INFO [stderr] 11 | #[macro_escape]
Nov 28 23:30:07.808 INFO [stderr]    | ^^^^^^^^^^^^^^^
Nov 28 23:30:07.808 INFO [stderr] 
Nov 28 23:30:07.988 INFO [stderr] warning: unused attribute
Nov 28 23:30:07.988 INFO [stderr]  --> src/list.rs:9:1
Nov 28 23:30:07.988 INFO [stderr]   |
Nov 28 23:30:07.988 INFO [stderr] 9 | #[macro_escape]
Nov 28 23:30:07.988 INFO [stderr]   | ^^^^^^^^^^^^^^^
Nov 28 23:30:07.988 INFO [stderr]   |
Nov 28 23:30:07.988 INFO [stderr]   = note: #[warn(unused_attributes)] on by default
Nov 28 23:30:07.988 INFO [stderr] 
Nov 28 23:30:07.988 INFO [stderr] warning: unused attribute
Nov 28 23:30:07.988 INFO [stderr]   --> src/tree/binary_tree.rs:11:1
Nov 28 23:30:07.988 INFO [stderr]    |
Nov 28 23:30:07.988 INFO [stderr] 11 | #[macro_escape]
Nov 28 23:30:07.988 INFO [stderr]    | ^^^^^^^^^^^^^^^
Nov 28 23:30:07.988 INFO [stderr] 
Nov 28 23:30:08.020 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
Nov 28 23:30:08.022 INFO [stderr] su: No module specific data is present
Nov 28 23:30:08.732 INFO running `"docker" "inspect" "b801878e676c7df77b16a99da8f731b06e2ed240d36a75df880b1c882b57c080"`
Nov 28 23:30:09.045 INFO running `"docker" "rm" "-f" "b801878e676c7df77b16a99da8f731b06e2ed240d36a75df880b1c882b57c080"`
Nov 28 23:30:09.313 INFO [stdout] b801878e676c7df77b16a99da8f731b06e2ed240d36a75df880b1c882b57c080