Dec 12 13:15:37.493 INFO checking hindley-milner-0.1.0 against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 12 13:15:37.493 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-2/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/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 12 13:15:37.850 INFO [stdout] f051369cbfca2b4e5b57b47135890cb15b8ba0f71555035be07399e7eccbf0d6
Dec 12 13:15:37.858 INFO running `"docker" "start" "-a" "f051369cbfca2b4e5b57b47135890cb15b8ba0f71555035be07399e7eccbf0d6"`
Dec 12 13:15:38.399 INFO [stderr] usermod: no changes
Dec 12 13:15:38.424 INFO [stderr]     Checking hindley-milner v0.1.0 (/source)
Dec 12 13:15:39.176 INFO [stderr] warning: struct is never constructed: `Namer`
Dec 12 13:15:39.176 INFO [stderr]   --> src/lib.rs:77:1
Dec 12 13:15:39.176 INFO [stderr]    |
Dec 12 13:15:39.177 INFO [stderr] 77 | struct Namer {
Dec 12 13:15:39.177 INFO [stderr]    | ^^^^^^^^^^^^
Dec 12 13:15:39.177 INFO [stderr]    |
Dec 12 13:15:39.177 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 13:15:39.177 INFO [stderr] 
Dec 12 13:15:39.177 INFO [stderr] warning: method is never used: `next`
Dec 12 13:15:39.177 INFO [stderr]   --> src/lib.rs:83:5
Dec 12 13:15:39.177 INFO [stderr]    |
Dec 12 13:15:39.177 INFO [stderr] 83 |     fn next(&mut self) -> String {
Dec 12 13:15:39.177 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 13:15:39.177 INFO [stderr] 
Dec 12 13:15:39.177 INFO [stderr] warning: method is never used: `name`
Dec 12 13:15:39.177 INFO [stderr]   --> src/lib.rs:89:5
Dec 12 13:15:39.177 INFO [stderr]    |
Dec 12 13:15:39.177 INFO [stderr] 89 |     fn name(&mut self, t: ArenaType) -> String {
Dec 12 13:15:39.177 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 13:15:39.177 INFO [stderr] 
Dec 12 13:15:39.177 INFO [stderr] warning: method is never used: `id`
Dec 12 13:15:39.177 INFO [stderr]    --> src/lib.rs:124:5
Dec 12 13:15:39.177 INFO [stderr]     |
Dec 12 13:15:39.177 INFO [stderr] 124 |     fn id(&self) -> usize {
Dec 12 13:15:39.177 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 12 13:15:39.177 INFO [stderr] 
Dec 12 13:15:39.177 INFO [stderr] warning: method is never used: `as_string`
Dec 12 13:15:39.177 INFO [stderr]    --> src/lib.rs:146:5
Dec 12 13:15:39.177 INFO [stderr]     |
Dec 12 13:15:39.177 INFO [stderr] 146 |     fn as_string(&self, a: &Vec<Type>, namer: &mut Namer) -> String {
Dec 12 13:15:39.177 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 13:15:39.177 INFO [stderr] 
Dec 12 13:15:39.177 INFO [stderr] warning: function is never used: `test_env`
Dec 12 13:15:39.177 INFO [stderr]    --> src/lib.rs:537:1
Dec 12 13:15:39.177 INFO [stderr]     |
Dec 12 13:15:39.177 INFO [stderr] 537 | fn test_env() -> (Vec<Type>, Env) {
Dec 12 13:15:39.177 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 13:15:39.177 INFO [stderr] 
Dec 12 13:15:39.542 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.13s
Dec 12 13:15:39.545 INFO [stderr] su: No module specific data is present
Dec 12 13:15:40.085 INFO running `"docker" "inspect" "f051369cbfca2b4e5b57b47135890cb15b8ba0f71555035be07399e7eccbf0d6"`
Dec 12 13:15:40.398 INFO running `"docker" "rm" "-f" "f051369cbfca2b4e5b57b47135890cb15b8ba0f71555035be07399e7eccbf0d6"`
Dec 12 13:15:40.691 INFO [stdout] f051369cbfca2b4e5b57b47135890cb15b8ba0f71555035be07399e7eccbf0d6