Oct 13 13:48:40.462 INFO checking hindley-milner-0.1.0 against master#5af0bb83044c3fb43d59ad5f49ee5ae1a293901f for pr-54977
Oct 13 13:48:40.462 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-4/master#5af0bb83044c3fb43d59ad5f49ee5ae1a293901f:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-4/pr-54977/master#5af0bb83044c3fb43d59ad5f49ee5ae1a293901f:/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 +5af0bb83044c3fb43d59ad5f49ee5ae1a293901f-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"`
Oct 13 13:48:40.959 INFO blam! 206f8bcc9afd137446a9fd47399d31a81cd586edd0562917b8b0dc01ee222319
Oct 13 13:48:40.973 INFO running `"docker" "start" "-a" "206f8bcc9afd137446a9fd47399d31a81cd586edd0562917b8b0dc01ee222319"`
Oct 13 13:48:41.928 INFO kablam! usermod: no changes
Oct 13 13:48:42.012 INFO kablam!     Checking hindley-milner v0.1.0 (/source)
Oct 13 13:48:42.908 INFO kablam! warning: struct is never constructed: `Namer`
Oct 13 13:48:42.909 INFO kablam!   --> src/lib.rs:77:1
Oct 13 13:48:42.909 INFO kablam!    |
Oct 13 13:48:42.909 INFO kablam! 77 | struct Namer {
Oct 13 13:48:42.910 INFO kablam!    | ^^^^^^^^^^^^
Oct 13 13:48:42.910 INFO kablam!    |
Oct 13 13:48:42.910 INFO kablam!    = note: #[warn(dead_code)] on by default
Oct 13 13:48:42.911 INFO kablam! 
Oct 13 13:48:42.911 INFO kablam! warning: method is never used: `next`
Oct 13 13:48:42.911 INFO kablam!   --> src/lib.rs:83:5
Oct 13 13:48:42.911 INFO kablam!    |
Oct 13 13:48:42.912 INFO kablam! 83 |     fn next(&mut self) -> String {
Oct 13 13:48:42.912 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 13 13:48:42.912 INFO kablam! 
Oct 13 13:48:42.912 INFO kablam! warning: method is never used: `name`
Oct 13 13:48:42.913 INFO kablam!   --> src/lib.rs:89:5
Oct 13 13:48:42.913 INFO kablam!    |
Oct 13 13:48:42.913 INFO kablam! 89 |     fn name(&mut self, t: ArenaType) -> String {
Oct 13 13:48:42.914 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 13 13:48:42.914 INFO kablam! 
Oct 13 13:48:42.914 INFO kablam! warning: method is never used: `id`
Oct 13 13:48:42.914 INFO kablam!    --> src/lib.rs:124:5
Oct 13 13:48:42.915 INFO kablam!     |
Oct 13 13:48:42.915 INFO kablam! 124 |     fn id(&self) -> usize {
Oct 13 13:48:42.915 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^
Oct 13 13:48:42.915 INFO kablam! 
Oct 13 13:48:42.916 INFO kablam! warning: method is never used: `as_string`
Oct 13 13:48:42.916 INFO kablam!    --> src/lib.rs:146:5
Oct 13 13:48:42.916 INFO kablam!     |
Oct 13 13:48:42.916 INFO kablam! 146 |     fn as_string(&self, a: &Vec<Type>, namer: &mut Namer) -> String {
Oct 13 13:48:42.917 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 13 13:48:42.917 INFO kablam! 
Oct 13 13:48:42.917 INFO kablam! warning: function is never used: `test_env`
Oct 13 13:48:42.917 INFO kablam!    --> src/lib.rs:537:1
Oct 13 13:48:42.918 INFO kablam!     |
Oct 13 13:48:42.918 INFO kablam! 537 | fn test_env() -> (Vec<Type>, Env) {
Oct 13 13:48:42.918 INFO kablam!     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 13 13:48:42.918 INFO kablam! 
Oct 13 13:48:43.338 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.37s
Oct 13 13:48:43.348 INFO kablam! su: No module specific data is present
Oct 13 13:48:43.887 INFO running `"docker" "rm" "-f" "206f8bcc9afd137446a9fd47399d31a81cd586edd0562917b8b0dc01ee222319"`
Oct 13 13:48:44.120 INFO blam! 206f8bcc9afd137446a9fd47399d31a81cd586edd0562917b8b0dc01ee222319