[INFO] updating cached repository tigertoes/fe2o3
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tigertoes/fe2o3
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tigertoes/fe2o3" "work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/tigertoes/fe2o3"`
[INFO] [stderr] Cloning into 'work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/tigertoes/fe2o3'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tigertoes/fe2o3" "work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/gh/tigertoes/fe2o3"`
[INFO] [stderr] Cloning into 'work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/gh/tigertoes/fe2o3'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6ba5d9500add8b932adc51183d9c796271d21e0f
[INFO] sha for GitHub repo tigertoes/fe2o3: 6ba5d9500add8b932adc51183d9c796271d21e0f
[INFO] validating manifest of tigertoes/fe2o3 on toolchain master#e2f221c75932de7a29845c8d6f1f73536ad00c41
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e2f221c75932de7a29845c8d6f1f73536ad00c41-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tigertoes/fe2o3 on toolchain try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0bfb90d213a93e466b33d078a5b535a2a6f9c5ff-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tigertoes/fe2o3
[INFO] finished frobbing tigertoes/fe2o3
[INFO] frobbed toml for tigertoes/fe2o3 written to work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/tigertoes/fe2o3/Cargo.toml
[INFO] started frobbing tigertoes/fe2o3
[INFO] finished frobbing tigertoes/fe2o3
[INFO] frobbed toml for tigertoes/fe2o3 written to work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/gh/tigertoes/fe2o3/Cargo.toml
[INFO] crate tigertoes/fe2o3 has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e2f221c75932de7a29845c8d6f1f73536ad00c41-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0bfb90d213a93e466b33d078a5b535a2a6f9c5ff-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking tigertoes/fe2o3 against master#e2f221c75932de7a29845c8d6f1f73536ad00c41 for pr-57617
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57617/worker-1/master#e2f221c75932de7a29845c8d6f1f73536ad00c41:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/tigertoes/fe2o3:/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" "+e2f221c75932de7a29845c8d6f1f73536ad00c41-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 6f06c9b137e50da1974b80de2eec82143b22380bbdfeb7097014ad592b0c3de6
[INFO] running `"docker" "start" "-a" "6f06c9b137e50da1974b80de2eec82143b22380bbdfeb7097014ad592b0c3de6"`
[INFO] [stderr]     Checking serde v1.0.21
[INFO] [stderr]    Compiling serde_derive v1.0.21
[INFO] [stderr]     Checking hyper v0.11.7
[INFO] [stderr]     Checking maxminddb v0.8.1
[INFO] [stderr]     Checking fe2o3 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `ct_result`
[INFO] [stderr] warning: unused variable: `ct_result`
[INFO] [stderr]   --> src/lib.rs:49:13
[INFO] [stderr]    |
[INFO] [stderr] 49 |         let ct_result: Result<City, MaxMindDBError> = self.city.lookup(ip);
[INFO] [stderr]    |             ^^^^^^^^^ help: consider using `_ct_result` instead
[INFO] [stderr]   --> src/lib.rs:49:13
[INFO] [stderr]    |
[INFO] [stderr] 49 |         let ct_result: Result<City, MaxMindDBError> = self.city.lookup(ip);
[INFO] [stderr]    |             ^^^^^^^^^ help: consider using `_ct_result` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `as_result`
[INFO] [stderr]   --> src/lib.rs:50:13
[INFO] [stderr]    |
[INFO] [stderr] 50 |         let as_result: Result<Isp, MaxMindDBError> = self.autonomous_system.lookup(ip);
[INFO] [stderr]    |             ^^^^^^^^^ help: consider using `_as_result` instead
[INFO] [stderr] 
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `as_result`
[INFO] [stderr]   --> src/lib.rs:50:13
[INFO] [stderr]    |
[INFO] [stderr] 50 |         let as_result: Result<Isp, MaxMindDBError> = self.autonomous_system.lookup(ip);
[INFO] [stderr]    |             ^^^^^^^^^ help: consider using `_as_result` instead
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `AS_NOT_FOUND`
[INFO] [stderr]   --> src/lib.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | static AS_NOT_FOUND: &'static str = "0";
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `AS_NOT_FOUND`
[INFO] [stderr]   --> src/lib.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | static AS_NOT_FOUND: &'static str = "0";
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.78s
[INFO] running `"docker" "inspect" "6f06c9b137e50da1974b80de2eec82143b22380bbdfeb7097014ad592b0c3de6"`
[INFO] running `"docker" "rm" "-f" "6f06c9b137e50da1974b80de2eec82143b22380bbdfeb7097014ad592b0c3de6"`
[INFO] [stdout] 6f06c9b137e50da1974b80de2eec82143b22380bbdfeb7097014ad592b0c3de6