Sep 21 08:31:09.083 INFO checking immutable-0.1.1 against master#f7f4c500b46603386e940f116b469c7adc043a6d for pr-54394
Sep 21 08:31:09.083 INFO running: cargo +f7f4c500b46603386e940f116b469c7adc043a6d-alt check --frozen --all --all-targets
Sep 21 08:31:09.083 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-7/pr-54394/master#f7f4c500b46603386e940f116b469c7adc043a6d:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54394/worker-7/master#f7f4c500b46603386e940f116b469c7adc043a6d:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "CMD=cargo +f7f4c500b46603386e940f116b469c7adc043a6d-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 21 08:31:09.245 INFO blam! cda64fc6c8313b0e5cf6621dc4f59f9afd1e65a579a8035eae6f1c739b5f64af
Sep 21 08:31:09.246 INFO running `"docker" "start" "-a" "cda64fc6c8313b0e5cf6621dc4f59f9afd1e65a579a8035eae6f1c739b5f64af"`
Sep 21 08:31:10.066 INFO kablam! usermod: no changes
Sep 21 08:31:10.098 INFO kablam!     Checking immutable v0.1.1 (/source)
Sep 21 08:31:10.361 INFO kablam! warning: unused import: `std::vec::IntoIter`
Sep 21 08:31:10.361 INFO kablam!  --> src/list.rs:7:5
Sep 21 08:31:10.361 INFO kablam!   |
Sep 21 08:31:10.361 INFO kablam! 7 | use std::vec::IntoIter;
Sep 21 08:31:10.361 INFO kablam!   |     ^^^^^^^^^^^^^^^^^^
Sep 21 08:31:10.361 INFO kablam!   |
Sep 21 08:31:10.361 INFO kablam!   = note: #[warn(unused_imports)] on by default
Sep 21 08:31:10.361 INFO kablam! 
Sep 21 08:31:10.367 INFO kablam! warning: unused import: `std::vec::IntoIter`
Sep 21 08:31:10.367 INFO kablam!  --> src/list.rs:7:5
Sep 21 08:31:10.367 INFO kablam!   |
Sep 21 08:31:10.367 INFO kablam! 7 | use std::vec::IntoIter;
Sep 21 08:31:10.367 INFO kablam!   |     ^^^^^^^^^^^^^^^^^^
Sep 21 08:31:10.367 INFO kablam!   |
Sep 21 08:31:10.367 INFO kablam!   = note: #[warn(unused_imports)] on by default
Sep 21 08:31:10.367 INFO kablam! 
Sep 21 08:31:10.542 INFO kablam! warning: unused attribute
Sep 21 08:31:10.542 INFO kablam!  --> src/list.rs:9:1
Sep 21 08:31:10.542 INFO kablam!   |
Sep 21 08:31:10.542 INFO kablam! 9 | #[macro_escape]
Sep 21 08:31:10.542 INFO kablam!   | ^^^^^^^^^^^^^^^
Sep 21 08:31:10.542 INFO kablam!   |
Sep 21 08:31:10.542 INFO kablam!   = note: #[warn(unused_attributes)] on by default
Sep 21 08:31:10.542 INFO kablam! 
Sep 21 08:31:10.542 INFO kablam! warning: unused attribute
Sep 21 08:31:10.542 INFO kablam!   --> src/tree/binary_tree.rs:11:1
Sep 21 08:31:10.542 INFO kablam!    |
Sep 21 08:31:10.542 INFO kablam! 11 | #[macro_escape]
Sep 21 08:31:10.542 INFO kablam!    | ^^^^^^^^^^^^^^^
Sep 21 08:31:10.542 INFO kablam! 
Sep 21 08:31:10.611 INFO kablam! warning: unused attribute
Sep 21 08:31:10.611 INFO kablam!  --> src/list.rs:9:1
Sep 21 08:31:10.611 INFO kablam!   |
Sep 21 08:31:10.611 INFO kablam! 9 | #[macro_escape]
Sep 21 08:31:10.611 INFO kablam!   | ^^^^^^^^^^^^^^^
Sep 21 08:31:10.611 INFO kablam! 
Sep 21 08:31:10.611 INFO kablam! warning: unused attribute
Sep 21 08:31:10.611 INFO kablam!   --> src/tree/binary_tree.rs:11:1
Sep 21 08:31:10.611 INFO kablam!    |
Sep 21 08:31:10.611 INFO kablam! 11 | #[macro_escape]
Sep 21 08:31:10.611 INFO kablam!    | ^^^^^^^^^^^^^^^
Sep 21 08:31:10.611 INFO kablam! 
Sep 21 08:31:10.629 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.54s
Sep 21 08:31:10.635 INFO kablam! su: No module specific data is present
Sep 21 08:31:11.414 INFO running `"docker" "rm" "-f" "cda64fc6c8313b0e5cf6621dc4f59f9afd1e65a579a8035eae6f1c739b5f64af"`
Sep 21 08:31:11.468 INFO blam! cda64fc6c8313b0e5cf6621dc4f59f9afd1e65a579a8035eae6f1c739b5f64af