[INFO] updating cached repository justincampbell/url-shortener-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/justincampbell/url-shortener-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/justincampbell/url-shortener-rust" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/justincampbell/url-shortener-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/justincampbell/url-shortener-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/justincampbell/url-shortener-rust" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/justincampbell/url-shortener-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/justincampbell/url-shortener-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] dea15a889eaf723a4ab9ccfa1a9ca95e078f3b0a
[INFO] sha for GitHub repo justincampbell/url-shortener-rust: dea15a889eaf723a4ab9ccfa1a9ca95e078f3b0a
[INFO] validating manifest of justincampbell/url-shortener-rust on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of justincampbell/url-shortener-rust on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing justincampbell/url-shortener-rust
[INFO] finished frobbing justincampbell/url-shortener-rust
[INFO] frobbed toml for justincampbell/url-shortener-rust written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/justincampbell/url-shortener-rust/Cargo.toml
[INFO] started frobbing justincampbell/url-shortener-rust
[INFO] finished frobbing justincampbell/url-shortener-rust
[INFO] frobbed toml for justincampbell/url-shortener-rust written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/justincampbell/url-shortener-rust/Cargo.toml
[INFO] crate justincampbell/url-shortener-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking justincampbell/url-shortener-rust against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-4/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/justincampbell/url-shortener-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] e6f1ae8986faf00d7c534dd997d8c2a3f4c2914b0af83a0f672c00bb158e3ac9
[INFO] running `"docker" "start" "-a" "e6f1ae8986faf00d7c534dd997d8c2a3f4c2914b0af83a0f672c00bb158e3ac9"`
[INFO] [stderr]     Checking shortener v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: type alias is never used: `Token`
[INFO] [stderr]  --> src/shortener.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | type Token = String;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Url`
[INFO] [stderr]  --> src/shortener.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | type Url = String;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `World`
[INFO] [stderr]  --> src/shortener.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct World {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `empty`
[INFO] [stderr]   --> src/shortener.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn empty() -> World {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `shorten`
[INFO] [stderr]   --> src/shortener.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn shorten(&mut self, url: &Url) -> Token {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `expand`
[INFO] [stderr]   --> src/shortener.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn expand(&self, token: Token) -> Option<&Url> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tokenize`
[INFO] [stderr]   --> src/shortener.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn tokenize(id: i32) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `"docker" "inspect" "e6f1ae8986faf00d7c534dd997d8c2a3f4c2914b0af83a0f672c00bb158e3ac9"`
[INFO] running `"docker" "rm" "-f" "e6f1ae8986faf00d7c534dd997d8c2a3f4c2914b0af83a0f672c00bb158e3ac9"`
[INFO] [stdout] e6f1ae8986faf00d7c534dd997d8c2a3f4c2914b0af83a0f672c00bb158e3ac9