Sep 01 14:59:14.986 INFO checking justincampbell/url-shortener-rust against master#1114ab684fbad001c4e580326d8eb4d8c4e917d3 for pr-53851
Sep 01 14:59:14.986 INFO running: cargo +1114ab684fbad001c4e580326d8eb4d8c4e917d3-alt check --frozen --all --all-targets
Sep 01 14:59:14.986 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53851/master#1114ab684fbad001c4e580326d8eb4d8c4e917d3:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53851/worker-1/master#1114ab684fbad001c4e580326d8eb4d8c4e917d3:/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 +1114ab684fbad001c4e580326d8eb4d8c4e917d3-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 14:59:15.190 INFO blam! d2d6df30e09329d4eb22b395ecb1ea17b494801f431e5cec8e855140b861e00f
Sep 01 14:59:15.192 INFO running `"docker" "start" "-a" "d2d6df30e09329d4eb22b395ecb1ea17b494801f431e5cec8e855140b861e00f"`
Sep 01 14:59:15.856 INFO kablam!     Checking shortener v0.0.1 (file:///source)
Sep 01 14:59:16.107 INFO kablam! warning: type alias is never used: `Token`
Sep 01 14:59:16.107 INFO kablam!  --> src/shortener.rs:3:1
Sep 01 14:59:16.107 INFO kablam!   |
Sep 01 14:59:16.107 INFO kablam! 3 | type Token = String;
Sep 01 14:59:16.107 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^
Sep 01 14:59:16.107 INFO kablam!   |
Sep 01 14:59:16.107 INFO kablam!   = note: #[warn(dead_code)] on by default
Sep 01 14:59:16.107 INFO kablam! 
Sep 01 14:59:16.108 INFO kablam! warning: type alias is never used: `Url`
Sep 01 14:59:16.108 INFO kablam!  --> src/shortener.rs:4:1
Sep 01 14:59:16.108 INFO kablam!   |
Sep 01 14:59:16.108 INFO kablam! 4 | type Url = String;
Sep 01 14:59:16.108 INFO kablam!   | ^^^^^^^^^^^^^^^^^^
Sep 01 14:59:16.108 INFO kablam! 
Sep 01 14:59:16.108 INFO kablam! warning: struct is never constructed: `World`
Sep 01 14:59:16.108 INFO kablam!  --> src/shortener.rs:6:1
Sep 01 14:59:16.108 INFO kablam!   |
Sep 01 14:59:16.108 INFO kablam! 6 | pub struct World {
Sep 01 14:59:16.108 INFO kablam!   | ^^^^^^^^^^^^^^^^
Sep 01 14:59:16.108 INFO kablam! 
Sep 01 14:59:16.108 INFO kablam! warning: method is never used: `empty`
Sep 01 14:59:16.108 INFO kablam!   --> src/shortener.rs:12:5
Sep 01 14:59:16.108 INFO kablam!    |
Sep 01 14:59:16.108 INFO kablam! 12 |     pub fn empty() -> World {
Sep 01 14:59:16.108 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 14:59:16.108 INFO kablam! 
Sep 01 14:59:16.108 INFO kablam! warning: method is never used: `shorten`
Sep 01 14:59:16.108 INFO kablam!   --> src/shortener.rs:16:5
Sep 01 14:59:16.108 INFO kablam!    |
Sep 01 14:59:16.108 INFO kablam! 16 |     pub fn shorten(&mut self, url: &Url) -> Token {
Sep 01 14:59:16.108 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 14:59:16.108 INFO kablam! 
Sep 01 14:59:16.108 INFO kablam! warning: method is never used: `expand`
Sep 01 14:59:16.109 INFO kablam!   --> src/shortener.rs:25:5
Sep 01 14:59:16.109 INFO kablam!    |
Sep 01 14:59:16.109 INFO kablam! 25 |     pub fn expand(&self, token: Token) -> Option<&Url> {
Sep 01 14:59:16.109 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 14:59:16.109 INFO kablam! 
Sep 01 14:59:16.109 INFO kablam! warning: method is never used: `tokenize`
Sep 01 14:59:16.109 INFO kablam!   --> src/shortener.rs:29:5
Sep 01 14:59:16.109 INFO kablam!    |
Sep 01 14:59:16.109 INFO kablam! 29 |     fn tokenize(id: i32) -> String {
Sep 01 14:59:16.109 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 14:59:16.109 INFO kablam! 
Sep 01 14:59:16.120 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.28s
Sep 01 14:59:16.122 INFO kablam! su: No module specific data is present
Sep 01 14:59:16.560 INFO running `"docker" "rm" "-f" "d2d6df30e09329d4eb22b395ecb1ea17b494801f431e5cec8e855140b861e00f"`
Sep 01 14:59:16.700 INFO blam! d2d6df30e09329d4eb22b395ecb1ea17b494801f431e5cec8e855140b861e00f