Nov 30 20:54:08.118 INFO checking immutable-0.1.1 against try#32252761328f59ccfadb1bafb8148c685bc830b3 for pr-56323
Nov 30 20:54:08.118 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-7/try#32252761328f59ccfadb1bafb8148c685bc830b3:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56323/try#32252761328f59ccfadb1bafb8148c685bc830b3:/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 +32252761328f59ccfadb1bafb8148c685bc830b3-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 30 20:54:08.339 INFO [stdout] d992e9f50221ea36d4e5c32d3045341cb11f8f08bf13fe6020750a3709c21ec8
Nov 30 20:54:08.342 INFO running `"docker" "start" "-a" "d992e9f50221ea36d4e5c32d3045341cb11f8f08bf13fe6020750a3709c21ec8"`
Nov 30 20:54:08.758 INFO [stderr] usermod: no changes
Nov 30 20:54:08.784 INFO [stderr]     Checking immutable v0.1.1 (/source)
Nov 30 20:54:09.312 INFO [stderr] warning: unused import: `std::vec::IntoIter`
Nov 30 20:54:09.312 INFO [stderr]  --> src/list.rs:7:5
Nov 30 20:54:09.312 INFO [stderr]   |
Nov 30 20:54:09.312 INFO [stderr] 7 | use std::vec::IntoIter;
Nov 30 20:54:09.312 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Nov 30 20:54:09.312 INFO [stderr]   |
Nov 30 20:54:09.312 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 30 20:54:09.312 INFO [stderr] 
Nov 30 20:54:09.448 INFO [stderr] warning: unused import: `std::vec::IntoIter`
Nov 30 20:54:09.450 INFO [stderr]  --> src/list.rs:7:5
Nov 30 20:54:09.450 INFO [stderr]   |
Nov 30 20:54:09.450 INFO [stderr] 7 | use std::vec::IntoIter;
Nov 30 20:54:09.450 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Nov 30 20:54:09.450 INFO [stderr]   |
Nov 30 20:54:09.450 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Nov 30 20:54:09.450 INFO [stderr] 
Nov 30 20:54:09.472 INFO [stderr] warning: unused attribute
Nov 30 20:54:09.472 INFO [stderr]  --> src/list.rs:9:1
Nov 30 20:54:09.472 INFO [stderr]   |
Nov 30 20:54:09.472 INFO [stderr] 9 | #[macro_escape]
Nov 30 20:54:09.472 INFO [stderr]   | ^^^^^^^^^^^^^^^
Nov 30 20:54:09.472 INFO [stderr]   |
Nov 30 20:54:09.472 INFO [stderr]   = note: #[warn(unused_attributes)] on by default
Nov 30 20:54:09.472 INFO [stderr] 
Nov 30 20:54:09.472 INFO [stderr] warning: unused attribute
Nov 30 20:54:09.472 INFO [stderr]   --> src/tree/binary_tree.rs:11:1
Nov 30 20:54:09.472 INFO [stderr]    |
Nov 30 20:54:09.472 INFO [stderr] 11 | #[macro_escape]
Nov 30 20:54:09.472 INFO [stderr]    | ^^^^^^^^^^^^^^^
Nov 30 20:54:09.472 INFO [stderr] 
Nov 30 20:54:09.666 INFO [stderr] warning: unused attribute
Nov 30 20:54:09.666 INFO [stderr]  --> src/list.rs:9:1
Nov 30 20:54:09.666 INFO [stderr]   |
Nov 30 20:54:09.666 INFO [stderr] 9 | #[macro_escape]
Nov 30 20:54:09.666 INFO [stderr]   | ^^^^^^^^^^^^^^^
Nov 30 20:54:09.666 INFO [stderr]   |
Nov 30 20:54:09.666 INFO [stderr]   = note: #[warn(unused_attributes)] on by default
Nov 30 20:54:09.666 INFO [stderr] 
Nov 30 20:54:09.666 INFO [stderr] warning: unused attribute
Nov 30 20:54:09.666 INFO [stderr]   --> src/tree/binary_tree.rs:11:1
Nov 30 20:54:09.666 INFO [stderr]    |
Nov 30 20:54:09.666 INFO [stderr] 11 | #[macro_escape]
Nov 30 20:54:09.666 INFO [stderr]    | ^^^^^^^^^^^^^^^
Nov 30 20:54:09.666 INFO [stderr] 
Nov 30 20:54:09.682 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.91s
Nov 30 20:54:09.700 INFO [stderr] su: No module specific data is present
Nov 30 20:54:10.148 INFO running `"docker" "inspect" "d992e9f50221ea36d4e5c32d3045341cb11f8f08bf13fe6020750a3709c21ec8"`
Nov 30 20:54:10.398 INFO running `"docker" "rm" "-f" "d992e9f50221ea36d4e5c32d3045341cb11f8f08bf13fe6020750a3709c21ec8"`
Nov 30 20:54:10.756 INFO [stdout] d992e9f50221ea36d4e5c32d3045341cb11f8f08bf13fe6020750a3709c21ec8