Sep 10 16:48:53.121 INFO checking hindley-milner-0.1.0 against try#3a2610c2a16575649896925631bf8cec4f4b1961 for pr-54090
Sep 10 16:48:53.121 INFO running: cargo +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets
Sep 10 16:48:53.121 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-54090/try#3a2610c2a16575649896925631bf8cec4f4b1961:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-2/try#3a2610c2a16575649896925631bf8cec4f4b1961:/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 +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 16:48:53.276 INFO blam! 954d2952b4ae8fc6ba22d3371b22d17479545ef43f2f9712166f21f31686d9fc
Sep 10 16:48:53.278 INFO running `"docker" "start" "-a" "954d2952b4ae8fc6ba22d3371b22d17479545ef43f2f9712166f21f31686d9fc"`
Sep 10 16:48:54.483 INFO kablam! usermod: no changes
Sep 10 16:48:54.570 INFO kablam!     Checking hindley-milner v0.1.0 (file:///source)
Sep 10 16:48:55.234 INFO kablam! warning: struct is never constructed: `Namer`
Sep 10 16:48:55.234 INFO kablam!   --> src/lib.rs:77:1
Sep 10 16:48:55.234 INFO kablam!    |
Sep 10 16:48:55.234 INFO kablam! 77 | struct Namer {
Sep 10 16:48:55.234 INFO kablam!    | ^^^^^^^^^^^^
Sep 10 16:48:55.234 INFO kablam!    |
Sep 10 16:48:55.234 INFO kablam!    = note: #[warn(dead_code)] on by default
Sep 10 16:48:55.234 INFO kablam! 
Sep 10 16:48:55.234 INFO kablam! warning: method is never used: `next`
Sep 10 16:48:55.234 INFO kablam!   --> src/lib.rs:83:5
Sep 10 16:48:55.234 INFO kablam!    |
Sep 10 16:48:55.234 INFO kablam! 83 |     fn next(&mut self) -> String {
Sep 10 16:48:55.234 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 10 16:48:55.234 INFO kablam! 
Sep 10 16:48:55.234 INFO kablam! warning: method is never used: `name`
Sep 10 16:48:55.234 INFO kablam!   --> src/lib.rs:89:5
Sep 10 16:48:55.234 INFO kablam!    |
Sep 10 16:48:55.234 INFO kablam! 89 |     fn name(&mut self, t: ArenaType) -> String {
Sep 10 16:48:55.234 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 10 16:48:55.234 INFO kablam! 
Sep 10 16:48:55.234 INFO kablam! warning: method is never used: `id`
Sep 10 16:48:55.234 INFO kablam!    --> src/lib.rs:124:5
Sep 10 16:48:55.234 INFO kablam!     |
Sep 10 16:48:55.234 INFO kablam! 124 |     fn id(&self) -> usize {
Sep 10 16:48:55.234 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^
Sep 10 16:48:55.234 INFO kablam! 
Sep 10 16:48:55.234 INFO kablam! warning: method is never used: `as_string`
Sep 10 16:48:55.234 INFO kablam!    --> src/lib.rs:146:5
Sep 10 16:48:55.234 INFO kablam!     |
Sep 10 16:48:55.234 INFO kablam! 146 |     fn as_string(&self, a: &Vec<Type>, namer: &mut Namer) -> String {
Sep 10 16:48:55.234 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 10 16:48:55.234 INFO kablam! 
Sep 10 16:48:55.234 INFO kablam! warning: function is never used: `test_env`
Sep 10 16:48:55.234 INFO kablam!    --> src/lib.rs:537:1
Sep 10 16:48:55.234 INFO kablam!     |
Sep 10 16:48:55.234 INFO kablam! 537 | fn test_env() -> (Vec<Type>, Env) {
Sep 10 16:48:55.234 INFO kablam!     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 10 16:48:55.235 INFO kablam! 
Sep 10 16:48:55.467 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.94s
Sep 10 16:48:55.470 INFO kablam! su: No module specific data is present
Sep 10 16:48:56.448 INFO running `"docker" "rm" "-f" "954d2952b4ae8fc6ba22d3371b22d17479545ef43f2f9712166f21f31686d9fc"`
Sep 10 16:48:56.591 INFO blam! 954d2952b4ae8fc6ba22d3371b22d17479545ef43f2f9712166f21f31686d9fc