Oct 12 09:59:03.248 INFO checking zabio3/peano against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 12 09:59:03.250 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-4/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-4/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/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 +4021bd0b3c5815b087d6db10ce461e7e4854ade7-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"`
Oct 12 09:59:03.925 INFO blam! b36efe304a22f3885a9add340df20f36ae578985f36ba4a8e2aafbbc13b543bc
Oct 12 09:59:03.929 INFO running `"docker" "start" "-a" "b36efe304a22f3885a9add340df20f36ae578985f36ba4a8e2aafbbc13b543bc"`
Oct 12 09:59:05.202 INFO kablam! usermod: no changes
Oct 12 09:59:05.256 INFO kablam!     Checking peano v0.1.0 (/source)
Oct 12 09:59:05.532 INFO kablam! warning: enum is never used: `Peano`
Oct 12 09:59:05.532 INFO kablam!  --> src/main.rs:2:1
Oct 12 09:59:05.532 INFO kablam!   |
Oct 12 09:59:05.532 INFO kablam! 2 | enum Peano<'a> {
Oct 12 09:59:05.532 INFO kablam!   | ^^^^^^^^^^^^^^
Oct 12 09:59:05.532 INFO kablam!   |
Oct 12 09:59:05.532 INFO kablam!   = note: #[warn(dead_code)] on by default
Oct 12 09:59:05.532 INFO kablam! 
Oct 12 09:59:05.532 INFO kablam! warning: method is never used: `to_i`
Oct 12 09:59:05.532 INFO kablam!   --> src/main.rs:13:5
Oct 12 09:59:05.532 INFO kablam!    |
Oct 12 09:59:05.532 INFO kablam! 13 |     fn to_i(&self) -> u32 {
Oct 12 09:59:05.532 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^
Oct 12 09:59:05.532 INFO kablam! 
Oct 12 09:59:05.532 INFO kablam! warning: function is never used: `zero`
Oct 12 09:59:05.532 INFO kablam!   --> src/main.rs:21:1
Oct 12 09:59:05.532 INFO kablam!    |
Oct 12 09:59:05.532 INFO kablam! 21 | fn zero<'a>() -> Peano<'a> {
Oct 12 09:59:05.532 INFO kablam!    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 09:59:05.532 INFO kablam! 
Oct 12 09:59:05.532 INFO kablam! warning: function is never used: `suc`
Oct 12 09:59:05.532 INFO kablam!   --> src/main.rs:26:1
Oct 12 09:59:05.532 INFO kablam!    |
Oct 12 09:59:05.532 INFO kablam! 26 | fn suc<'a>(n: &'a Peano) -> Peano<'a> {
Oct 12 09:59:05.532 INFO kablam!    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 09:59:05.532 INFO kablam! 
Oct 12 09:59:05.609 INFO kablam! warning: variant is never constructed: `Suc`
Oct 12 09:59:05.609 INFO kablam!  --> src/main.rs:8:5
Oct 12 09:59:05.609 INFO kablam!   |
Oct 12 09:59:05.610 INFO kablam! 8 |     Suc(&'a Peano<'a>),
Oct 12 09:59:05.610 INFO kablam!   |     ^^^^^^^^^^^^^^^^^^
Oct 12 09:59:05.610 INFO kablam!   |
Oct 12 09:59:05.611 INFO kablam!   = note: #[warn(dead_code)] on by default
Oct 12 09:59:05.611 INFO kablam! 
Oct 12 09:59:05.611 INFO kablam! warning: function is never used: `suc`
Oct 12 09:59:05.612 INFO kablam!   --> src/main.rs:26:1
Oct 12 09:59:05.612 INFO kablam!    |
Oct 12 09:59:05.612 INFO kablam! 26 | fn suc<'a>(n: &'a Peano) -> Peano<'a> {
Oct 12 09:59:05.613 INFO kablam!    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 09:59:05.613 INFO kablam! 
Oct 12 09:59:05.632 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.41s
Oct 12 09:59:05.633 INFO kablam! su: No module specific data is present
Oct 12 09:59:06.175 INFO running `"docker" "rm" "-f" "b36efe304a22f3885a9add340df20f36ae578985f36ba4a8e2aafbbc13b543bc"`
Oct 12 09:59:06.545 INFO blam! b36efe304a22f3885a9add340df20f36ae578985f36ba4a8e2aafbbc13b543bc