[INFO] updating cached repository lethe2211/iron_sample
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lethe2211/iron_sample
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lethe2211/iron_sample" "work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/lethe2211/iron_sample"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/lethe2211/iron_sample'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lethe2211/iron_sample" "work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/lethe2211/iron_sample"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/lethe2211/iron_sample'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b37506d0d519b2e9ef4de3e7c98875816673a6ea
[INFO] sha for GitHub repo lethe2211/iron_sample: b37506d0d519b2e9ef4de3e7c98875816673a6ea
[INFO] validating manifest of lethe2211/iron_sample on toolchain master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of lethe2211/iron_sample on toolchain try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing lethe2211/iron_sample
[INFO] finished frobbing lethe2211/iron_sample
[INFO] frobbed toml for lethe2211/iron_sample written to work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/lethe2211/iron_sample/Cargo.toml
[INFO] started frobbing lethe2211/iron_sample
[INFO] finished frobbing lethe2211/iron_sample
[INFO] frobbed toml for lethe2211/iron_sample written to work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/lethe2211/iron_sample/Cargo.toml
[INFO] crate lethe2211/iron_sample already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking lethe2211/iron_sample against master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7 for pr-59199
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-59199/worker-5/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/lethe2211/iron_sample:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 11a7207888f1e171da7b2fee923785a5bcf42d14919689ab4c1d2a5a091bc034
[INFO] running `"docker" "start" "-a" "11a7207888f1e171da7b2fee923785a5bcf42d14919689ab4c1d2a5a091bc034"`
[INFO] [stderr]     Checking serde v1.0.2
[INFO] [stderr]     Checking openssl-sys v0.9.11
[INFO] [stderr]     Checking hyper v0.10.9
[INFO] [stderr]     Checking openssl v0.9.11
[INFO] [stderr]     Checking native-tls v0.1.2
[INFO] [stderr]     Checking iron v0.5.1
[INFO] [stderr]     Checking hyper-native-tls v0.2.2
[INFO] [stderr]     Checking router v0.5.1
[INFO] [stderr]     Checking serde_json v1.0.1
[INFO] [stderr]     Checking iron_example v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::convert::From`
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::convert::From;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Handler`
[INFO] [stderr]   --> src/main.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 | use iron::{Handler};
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Error`
[INFO] [stderr]   --> src/main.rs:22:25
[INFO] [stderr]    |
[INFO] [stderr] 22 | use serde_json::{Value, Error};
[INFO] [stderr]    |                         ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::convert::From`
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::convert::From;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Handler`
[INFO] [stderr]   --> src/main.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 | use iron::{Handler};
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Error`
[INFO] [stderr]   --> src/main.rs:22:25
[INFO] [stderr]    |
[INFO] [stderr] 22 | use serde_json::{Value, Error};
[INFO] [stderr]    |                         ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]   --> src/main.rs:39:17
[INFO] [stderr]    |
[INFO] [stderr] 39 |         let mut res = client.get(url)
[INFO] [stderr]    |                 ^^^ help: consider prefixing with an underscore: `_res`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `query`
[INFO] [stderr]   --> src/main.rs:52:17
[INFO] [stderr]    |
[INFO] [stderr] 52 |         let ref query = req.extensions.get::<Router>().unwrap().find("query").unwrap_or("/");
[INFO] [stderr]    |                 ^^^^^ help: consider prefixing with an underscore: `_query`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:39:13
[INFO] [stderr]    |
[INFO] [stderr] 39 |         let mut res = client.get(url)
[INFO] [stderr]    |             ----^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]   --> src/main.rs:39:17
[INFO] [stderr]    |
[INFO] [stderr] 39 |         let mut res = client.get(url)
[INFO] [stderr]    |                 ^^^ help: consider prefixing with an underscore: `_res`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `query`
[INFO] [stderr]   --> src/main.rs:52:17
[INFO] [stderr]    |
[INFO] [stderr] 52 |         let ref query = req.extensions.get::<Router>().unwrap().find("query").unwrap_or("/");
[INFO] [stderr]    |                 ^^^^^ help: consider prefixing with an underscore: `_query`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:39:13
[INFO] [stderr]    |
[INFO] [stderr] 39 |         let mut res = client.get(url)
[INFO] [stderr]    |             ----^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.81s
[INFO] running `"docker" "inspect" "11a7207888f1e171da7b2fee923785a5bcf42d14919689ab4c1d2a5a091bc034"`
[INFO] running `"docker" "rm" "-f" "11a7207888f1e171da7b2fee923785a5bcf42d14919689ab4c1d2a5a091bc034"`
[INFO] [stdout] 11a7207888f1e171da7b2fee923785a5bcf42d14919689ab4c1d2a5a091bc034