Dec 11 05:17:00.922 INFO checking zabio3/peano against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 11 05:17:00.922 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-6/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/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 +aa9aa79c3c583aab59ac9134542d60a780c35e2e-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 11 05:17:01.400 INFO [stdout] a1207c10ceb779bade41e0d8bf893e9a910851fafcf462e8997a50553c9dbdf5
Dec 11 05:17:01.408 INFO running `"docker" "start" "-a" "a1207c10ceb779bade41e0d8bf893e9a910851fafcf462e8997a50553c9dbdf5"`
Dec 11 05:17:03.311 INFO [stderr] usermod: no changes
Dec 11 05:17:03.377 INFO [stderr]     Checking peano v0.1.0 (/source)
Dec 11 05:17:03.568 INFO [stderr] warning: enum is never used: `Peano`
Dec 11 05:17:03.568 INFO [stderr]  --> src/main.rs:2:1
Dec 11 05:17:03.568 INFO [stderr]   |
Dec 11 05:17:03.568 INFO [stderr] 2 | enum Peano<'a> {
Dec 11 05:17:03.568 INFO [stderr]   | ^^^^^^^^^^^^^^
Dec 11 05:17:03.568 INFO [stderr]   |
Dec 11 05:17:03.568 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 11 05:17:03.568 INFO [stderr] 
Dec 11 05:17:03.572 INFO [stderr] warning: method is never used: `to_i`
Dec 11 05:17:03.572 INFO [stderr]   --> src/main.rs:13:5
Dec 11 05:17:03.572 INFO [stderr]    |
Dec 11 05:17:03.572 INFO [stderr] 13 |     fn to_i(&self) -> u32 {
Dec 11 05:17:03.572 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Dec 11 05:17:03.572 INFO [stderr] 
Dec 11 05:17:03.572 INFO [stderr] warning: function is never used: `zero`
Dec 11 05:17:03.572 INFO [stderr]   --> src/main.rs:21:1
Dec 11 05:17:03.572 INFO [stderr]    |
Dec 11 05:17:03.572 INFO [stderr] 21 | fn zero<'a>() -> Peano<'a> {
Dec 11 05:17:03.572 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 05:17:03.572 INFO [stderr] 
Dec 11 05:17:03.572 INFO [stderr] warning: function is never used: `suc`
Dec 11 05:17:03.572 INFO [stderr]   --> src/main.rs:26:1
Dec 11 05:17:03.572 INFO [stderr]    |
Dec 11 05:17:03.572 INFO [stderr] 26 | fn suc<'a>(n: &'a Peano) -> Peano<'a> {
Dec 11 05:17:03.572 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 05:17:03.572 INFO [stderr] 
Dec 11 05:17:03.700 INFO [stderr] warning: variant is never constructed: `Suc`
Dec 11 05:17:03.700 INFO [stderr]  --> src/main.rs:8:5
Dec 11 05:17:03.700 INFO [stderr]   |
Dec 11 05:17:03.700 INFO [stderr] 8 |     Suc(&'a Peano<'a>),
Dec 11 05:17:03.700 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Dec 11 05:17:03.700 INFO [stderr]   |
Dec 11 05:17:03.700 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 11 05:17:03.700 INFO [stderr] 
Dec 11 05:17:03.700 INFO [stderr] warning: function is never used: `suc`
Dec 11 05:17:03.700 INFO [stderr]   --> src/main.rs:26:1
Dec 11 05:17:03.700 INFO [stderr]    |
Dec 11 05:17:03.700 INFO [stderr] 26 | fn suc<'a>(n: &'a Peano) -> Peano<'a> {
Dec 11 05:17:03.700 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 05:17:03.700 INFO [stderr] 
Dec 11 05:17:03.723 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.38s
Dec 11 05:17:03.727 INFO [stderr] su: No module specific data is present
Dec 11 05:17:04.590 INFO running `"docker" "inspect" "a1207c10ceb779bade41e0d8bf893e9a910851fafcf462e8997a50553c9dbdf5"`
Dec 11 05:17:04.954 INFO running `"docker" "rm" "-f" "a1207c10ceb779bade41e0d8bf893e9a910851fafcf462e8997a50553c9dbdf5"`
Dec 11 05:17:05.257 INFO [stdout] a1207c10ceb779bade41e0d8bf893e9a910851fafcf462e8997a50553c9dbdf5