Sep 21 08:50:01.954 INFO checking hindley-milner-0.1.0 against master#f7f4c500b46603386e940f116b469c7adc043a6d for pr-54394
Sep 21 08:50:01.954 INFO running: cargo +f7f4c500b46603386e940f116b469c7adc043a6d-alt check --frozen --all --all-targets
Sep 21 08:50:01.954 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-54394/master#f7f4c500b46603386e940f116b469c7adc043a6d:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54394/worker-3/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 08:50:02.118 INFO blam! aafa72cac2dbb7cc32bc245aa594a364f1d94f84920813505dcc6b6f50b9c7ac
Sep 21 08:50:02.120 INFO running `"docker" "start" "-a" "aafa72cac2dbb7cc32bc245aa594a364f1d94f84920813505dcc6b6f50b9c7ac"`
Sep 21 08:50:03.277 INFO kablam! usermod: no changes
Sep 21 08:50:03.354 INFO kablam!     Checking hindley-milner v0.1.0 (/source)
Sep 21 08:50:03.902 INFO kablam! warning: struct is never constructed: `Namer`
Sep 21 08:50:03.902 INFO kablam!   --> src/lib.rs:77:1
Sep 21 08:50:03.902 INFO kablam!    |
Sep 21 08:50:03.902 INFO kablam! 77 | struct Namer {
Sep 21 08:50:03.902 INFO kablam!    | ^^^^^^^^^^^^
Sep 21 08:50:03.902 INFO kablam!    |
Sep 21 08:50:03.902 INFO kablam!    = note: #[warn(dead_code)] on by default
Sep 21 08:50:03.902 INFO kablam! 
Sep 21 08:50:03.902 INFO kablam! warning: method is never used: `next`
Sep 21 08:50:03.902 INFO kablam!   --> src/lib.rs:83:5
Sep 21 08:50:03.902 INFO kablam!    |
Sep 21 08:50:03.902 INFO kablam! 83 |     fn next(&mut self) -> String {
Sep 21 08:50:03.902 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 21 08:50:03.902 INFO kablam! 
Sep 21 08:50:03.902 INFO kablam! warning: method is never used: `name`
Sep 21 08:50:03.902 INFO kablam!   --> src/lib.rs:89:5
Sep 21 08:50:03.902 INFO kablam!    |
Sep 21 08:50:03.902 INFO kablam! 89 |     fn name(&mut self, t: ArenaType) -> String {
Sep 21 08:50:03.902 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 21 08:50:03.902 INFO kablam! 
Sep 21 08:50:03.902 INFO kablam! warning: method is never used: `id`
Sep 21 08:50:03.902 INFO kablam!    --> src/lib.rs:124:5
Sep 21 08:50:03.902 INFO kablam!     |
Sep 21 08:50:03.902 INFO kablam! 124 |     fn id(&self) -> usize {
Sep 21 08:50:03.902 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^
Sep 21 08:50:03.902 INFO kablam! 
Sep 21 08:50:03.902 INFO kablam! warning: method is never used: `as_string`
Sep 21 08:50:03.902 INFO kablam!    --> src/lib.rs:146:5
Sep 21 08:50:03.902 INFO kablam!     |
Sep 21 08:50:03.902 INFO kablam! 146 |     fn as_string(&self, a: &Vec<Type>, namer: &mut Namer) -> String {
Sep 21 08:50:03.902 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 21 08:50:03.902 INFO kablam! 
Sep 21 08:50:03.902 INFO kablam! warning: function is never used: `test_env`
Sep 21 08:50:03.902 INFO kablam!    --> src/lib.rs:537:1
Sep 21 08:50:03.902 INFO kablam!     |
Sep 21 08:50:03.902 INFO kablam! 537 | fn test_env() -> (Vec<Type>, Env) {
Sep 21 08:50:03.902 INFO kablam!     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 21 08:50:03.902 INFO kablam! 
Sep 21 08:50:04.232 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.92s
Sep 21 08:50:04.234 INFO kablam! su: No module specific data is present
Sep 21 08:50:05.040 INFO running `"docker" "rm" "-f" "aafa72cac2dbb7cc32bc245aa594a364f1d94f84920813505dcc6b6f50b9c7ac"`
Sep 21 08:50:05.144 INFO blam! aafa72cac2dbb7cc32bc245aa594a364f1d94f84920813505dcc6b6f50b9c7ac