Dec 19 08:55:57.264 INFO checking shingtaklam1324/number-theory-rust against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 08:55:57.265 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/shingtaklam1324/number-theory-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 08:55:57.604 INFO [stdout] c602905a1102c8bcb163b2723deb6c52d673dc648271c996bcc24c6c1d63db7e
Dec 19 08:55:57.606 INFO running `"docker" "start" "-a" "c602905a1102c8bcb163b2723deb6c52d673dc648271c996bcc24c6c1d63db7e"`
Dec 19 08:55:58.884 INFO [stderr]     Checking number-theory v0.1.0 (/opt/crater/workdir)
Dec 19 08:55:59.121 INFO [stderr] warning: constant item is never used: `Zero`
Dec 19 08:55:59.121 INFO [stderr]   --> src/main.rs:12:1
Dec 19 08:55:59.121 INFO [stderr]    |
Dec 19 08:55:59.121 INFO [stderr] 12 | const Zero: Nat<Z> = Nat(Z);
Dec 19 08:55:59.121 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 08:55:59.121 INFO [stderr]    |
Dec 19 08:55:59.121 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 08:55:59.121 INFO [stderr] 
Dec 19 08:55:59.121 INFO [stderr] warning: function is never used: `Succ`
Dec 19 08:55:59.121 INFO [stderr]   --> src/main.rs:14:1
Dec 19 08:55:59.121 INFO [stderr]    |
Dec 19 08:55:59.121 INFO [stderr] 14 | fn Succ<A>(d: Nat<A>) -> Nat<S<A>> {
Dec 19 08:55:59.121 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 08:55:59.121 INFO [stderr] 
Dec 19 08:55:59.121 INFO [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
Dec 19 08:55:59.121 INFO [stderr]  --> src/main.rs:1:12
Dec 19 08:55:59.121 INFO [stderr]   |
Dec 19 08:55:59.121 INFO [stderr] 1 | #![feature(conservative_impl_trait)]
Dec 19 08:55:59.121 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 08:55:59.121 INFO [stderr]   |
Dec 19 08:55:59.121 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 19 08:55:59.121 INFO [stderr] 
Dec 19 08:55:59.184 INFO [stderr] warning: constant item is never used: `Zero`
Dec 19 08:55:59.184 INFO [stderr]   --> src/main.rs:12:1
Dec 19 08:55:59.184 INFO [stderr]    |
Dec 19 08:55:59.184 INFO [stderr] 12 | const Zero: Nat<Z> = Nat(Z);
Dec 19 08:55:59.184 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 08:55:59.184 INFO [stderr]    |
Dec 19 08:55:59.184 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 08:55:59.184 INFO [stderr] 
Dec 19 08:55:59.184 INFO [stderr] warning: function is never used: `Succ`
Dec 19 08:55:59.184 INFO [stderr]   --> src/main.rs:14:1
Dec 19 08:55:59.184 INFO [stderr]    |
Dec 19 08:55:59.184 INFO [stderr] 14 | fn Succ<A>(d: Nat<A>) -> Nat<S<A>> {
Dec 19 08:55:59.184 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 08:55:59.184 INFO [stderr] 
Dec 19 08:55:59.184 INFO [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
Dec 19 08:55:59.184 INFO [stderr]  --> src/main.rs:1:12
Dec 19 08:55:59.184 INFO [stderr]   |
Dec 19 08:55:59.184 INFO [stderr] 1 | #![feature(conservative_impl_trait)]
Dec 19 08:55:59.184 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 08:55:59.184 INFO [stderr]   |
Dec 19 08:55:59.184 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 19 08:55:59.185 INFO [stderr] 
Dec 19 08:55:59.209 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.34s
Dec 19 08:55:59.760 INFO running `"docker" "inspect" "c602905a1102c8bcb163b2723deb6c52d673dc648271c996bcc24c6c1d63db7e"`
Dec 19 08:56:00.130 INFO running `"docker" "rm" "-f" "c602905a1102c8bcb163b2723deb6c52d673dc648271c996bcc24c6c1d63db7e"`
Dec 19 08:56:00.348 INFO [stdout] c602905a1102c8bcb163b2723deb6c52d673dc648271c996bcc24c6c1d63db7e