Oct 13 03:20:35.405 INFO checking NikitaSmall/rust_rpn against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 13 03:20:35.406 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-5/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-5/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/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 +4021bd0b3c5815b087d6db10ce461e7e4854ade7-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 03:20:35.802 INFO blam! cd4ef8323b7079315140cf9afabf75ef59417cfb9371f3bb54d179d0a7ba8807
Oct 13 03:20:35.804 INFO running `"docker" "start" "-a" "cd4ef8323b7079315140cf9afabf75ef59417cfb9371f3bb54d179d0a7ba8807"`
Oct 13 03:20:37.252 INFO kablam! usermod: no changes
Oct 13 03:20:37.293 INFO kablam!     Checking rpn v0.1.0 (/source)
Oct 13 03:20:38.172 INFO kablam! warning: field is never used: `raw`
Oct 13 03:20:38.172 INFO kablam!   --> src/converter.rs:10:5
Oct 13 03:20:38.172 INFO kablam!    |
Oct 13 03:20:38.172 INFO kablam! 10 |     raw: String,
Oct 13 03:20:38.172 INFO kablam!    |     ^^^^^^^^^^^
Oct 13 03:20:38.172 INFO kablam!    |
Oct 13 03:20:38.172 INFO kablam!    = note: #[warn(dead_code)] on by default
Oct 13 03:20:38.172 INFO kablam! 
Oct 13 03:20:38.172 INFO kablam! warning: field is never used: `prededence`
Oct 13 03:20:38.172 INFO kablam!   --> src/converter.rs:12:5
Oct 13 03:20:38.172 INFO kablam!    |
Oct 13 03:20:38.172 INFO kablam! 12 |     prededence: HashMap<Stackable, i8>,
Oct 13 03:20:38.172 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 13 03:20:38.172 INFO kablam! 
Oct 13 03:20:38.172 INFO kablam! warning: method is never used: `convert`
Oct 13 03:20:38.172 INFO kablam!   --> src/converter.rs:16:5
Oct 13 03:20:38.172 INFO kablam!    |
Oct 13 03:20:38.172 INFO kablam! 16 |     pub fn convert(raw: String) -> Converter {
Oct 13 03:20:38.172 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 13 03:20:38.172 INFO kablam! 
Oct 13 03:20:38.172 INFO kablam! warning: method is never used: `process`
Oct 13 03:20:38.173 INFO kablam!   --> src/converter.rs:33:5
Oct 13 03:20:38.173 INFO kablam!    |
Oct 13 03:20:38.173 INFO kablam! 33 |     fn process(&mut self) {
Oct 13 03:20:38.173 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^
Oct 13 03:20:38.173 INFO kablam! 
Oct 13 03:20:38.504 INFO kablam! warning: variable does not need to be mutable
Oct 13 03:20:38.504 INFO kablam!   --> src/converter.rs:95:13
Oct 13 03:20:38.504 INFO kablam!    |
Oct 13 03:20:38.504 INFO kablam! 95 |         let mut converter = Converter::convert(example_string);
Oct 13 03:20:38.504 INFO kablam!    |             ----^^^^^^^^^
Oct 13 03:20:38.504 INFO kablam!    |             |
Oct 13 03:20:38.504 INFO kablam!    |             help: remove this `mut`
Oct 13 03:20:38.504 INFO kablam!    |
Oct 13 03:20:38.506 INFO kablam!    = note: #[warn(unused_mut)] on by default
Oct 13 03:20:38.506 INFO kablam! 
Oct 13 03:20:38.508 INFO kablam! warning: variable does not need to be mutable
Oct 13 03:20:38.508 INFO kablam!    --> src/converter.rs:103:13
Oct 13 03:20:38.508 INFO kablam!     |
Oct 13 03:20:38.508 INFO kablam! 103 |         let mut converter = Converter::convert(example_string);
Oct 13 03:20:38.508 INFO kablam!     |             ----^^^^^^^^^
Oct 13 03:20:38.508 INFO kablam!     |             |
Oct 13 03:20:38.508 INFO kablam!     |             help: remove this `mut`
Oct 13 03:20:38.508 INFO kablam! 
Oct 13 03:20:38.964 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.68s
Oct 13 03:20:38.974 INFO kablam! su: No module specific data is present
Oct 13 03:20:39.994 INFO running `"docker" "rm" "-f" "cd4ef8323b7079315140cf9afabf75ef59417cfb9371f3bb54d179d0a7ba8807"`
Oct 13 03:20:40.349 INFO blam! cd4ef8323b7079315140cf9afabf75ef59417cfb9371f3bb54d179d0a7ba8807