Sep 04 14:29:38.665 INFO checking hindley-milner-0.1.0 against try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0 for pr-53893
Sep 04 14:29:38.665 INFO running: cargo +6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0-alt check --frozen --all --all-targets
Sep 04 14:29:38.665 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-53893/try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53893/worker-0/try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0:/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=500" "-e" "CMD=cargo +6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 04 14:29:38.833 INFO blam! b7e8e39e8f18d0c6af241fb8733f18a0024360f31c8b8e20552aa6f578a7610c
Sep 04 14:29:38.835 INFO running `"docker" "start" "-a" "b7e8e39e8f18d0c6af241fb8733f18a0024360f31c8b8e20552aa6f578a7610c"`
Sep 04 14:29:39.490 INFO kablam!     Checking hindley-milner v0.1.0 (file:///source)
Sep 04 14:29:40.500 INFO kablam! warning: struct is never constructed: `Namer`
Sep 04 14:29:40.500 INFO kablam!   --> src/lib.rs:77:1
Sep 04 14:29:40.500 INFO kablam!    |
Sep 04 14:29:40.500 INFO kablam! 77 | struct Namer {
Sep 04 14:29:40.500 INFO kablam!    | ^^^^^^^^^^^^
Sep 04 14:29:40.500 INFO kablam!    |
Sep 04 14:29:40.500 INFO kablam!    = note: #[warn(dead_code)] on by default
Sep 04 14:29:40.500 INFO kablam! 
Sep 04 14:29:40.500 INFO kablam! warning: method is never used: `next`
Sep 04 14:29:40.500 INFO kablam!   --> src/lib.rs:83:5
Sep 04 14:29:40.500 INFO kablam!    |
Sep 04 14:29:40.500 INFO kablam! 83 |     fn next(&mut self) -> String {
Sep 04 14:29:40.500 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 04 14:29:40.500 INFO kablam! 
Sep 04 14:29:40.500 INFO kablam! warning: method is never used: `name`
Sep 04 14:29:40.501 INFO kablam!   --> src/lib.rs:89:5
Sep 04 14:29:40.501 INFO kablam!    |
Sep 04 14:29:40.501 INFO kablam! 89 |     fn name(&mut self, t: ArenaType) -> String {
Sep 04 14:29:40.501 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 04 14:29:40.501 INFO kablam! 
Sep 04 14:29:40.501 INFO kablam! warning: method is never used: `id`
Sep 04 14:29:40.501 INFO kablam!    --> src/lib.rs:124:5
Sep 04 14:29:40.501 INFO kablam!     |
Sep 04 14:29:40.501 INFO kablam! 124 |     fn id(&self) -> usize {
Sep 04 14:29:40.501 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^
Sep 04 14:29:40.501 INFO kablam! 
Sep 04 14:29:40.501 INFO kablam! warning: method is never used: `as_string`
Sep 04 14:29:40.501 INFO kablam!    --> src/lib.rs:146:5
Sep 04 14:29:40.501 INFO kablam!     |
Sep 04 14:29:40.501 INFO kablam! 146 |     fn as_string(&self, a: &Vec<Type>, namer: &mut Namer) -> String {
Sep 04 14:29:40.501 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 04 14:29:40.501 INFO kablam! 
Sep 04 14:29:40.501 INFO kablam! warning: function is never used: `test_env`
Sep 04 14:29:40.501 INFO kablam!    --> src/lib.rs:537:1
Sep 04 14:29:40.502 INFO kablam!     |
Sep 04 14:29:40.502 INFO kablam! 537 | fn test_env() -> (Vec<Type>, Env) {
Sep 04 14:29:40.502 INFO kablam!     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 04 14:29:40.502 INFO kablam! 
Sep 04 14:29:40.523 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.05s
Sep 04 14:29:40.525 INFO kablam! su: No module specific data is present
Sep 04 14:29:40.910 INFO running `"docker" "rm" "-f" "b7e8e39e8f18d0c6af241fb8733f18a0024360f31c8b8e20552aa6f578a7610c"`
Sep 04 14:29:40.992 INFO blam! b7e8e39e8f18d0c6af241fb8733f18a0024360f31c8b8e20552aa6f578a7610c