[INFO] updating cached repository https://github.com/vasily-kirichenko/failure_perf_issue
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cd2d108809f03ee3a02636d8c184f5f731abe8c4
[INFO] checking vasily-kirichenko/failure_perf_issue against master#c9edc02e8320a9e5799d185910ece7d491f524e6 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvasily-kirichenko%2Ffailure_perf_issue" "work/builds/worker-3/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vasily-kirichenko/failure_perf_issue on toolchain c9edc02e8320a9e5799d185910ece7d491f524e6-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/vasily-kirichenko/failure_perf_issue
[INFO] finished tweaking git repo https://github.com/vasily-kirichenko/failure_perf_issue
[INFO] tweaked toml for git repo https://github.com/vasily-kirichenko/failure_perf_issue written to work/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/vasily-kirichenko/failure_perf_issue already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 15817be967eb4877cc230cee159168033486388a7c902ea6b6c7805a2fa19503
[INFO] running `"docker" "start" "-a" "15817be967eb4877cc230cee159168033486388a7c902ea6b6c7805a2fa19503"`
[INFO] [stderr]    Compiling cc v1.0.12
[INFO] [stderr]     Checking tokio-reactor v0.1.1
[INFO] [stderr]     Checking tokio-udp v0.1.0
[INFO] [stderr]     Checking tokio-tcp v0.1.0
[INFO] [stderr]     Checking tokio v0.1.5
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]     Checking tokio-core v0.1.17
[INFO] [stderr]     Checking tokio-proto v0.1.1
[INFO] [stderr]     Checking hyper v0.11.25
[INFO] [stderr]     Checking backtrace v0.3.6
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]     Checking failure_perf_issue v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `content_type`
[INFO] [stderr]   --> src/main.rs:55:13
[INFO] [stderr]    |
[INFO] [stderr] 55 |         let content_type = res.headers().get::<ContentType>();
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_content_type`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `disp`
[INFO] [stderr]   --> src/main.rs:56:13
[INFO] [stderr]    |
[INFO] [stderr] 56 |         let disp = res.headers().get::<ContentDisposition>();
[INFO] [stderr]    |             ^^^^ help: consider prefixing with an underscore: `_disp`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `out_dir`
[INFO] [stderr]   --> src/main.rs:52:40
[INFO] [stderr]    |
[INFO] [stderr] 52 | fn download(core: &mut Core, uri: Uri, out_dir: &Path) -> Result<String, Error> {
[INFO] [stderr]    |                                        ^^^^^^^ help: consider prefixing with an underscore: `_out_dir`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `file_name`
[INFO] [stderr]    --> src/main.rs:115:9
[INFO] [stderr]     |
[INFO] [stderr] 115 |     let file_name = download(&mut core, artifact_uri, out_dir)?;
[INFO] [stderr]     |         ^^^^^^^^^ help: consider prefixing with an underscore: `_file_name`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `content_type`
[INFO] [stderr]   --> src/main.rs:55:13
[INFO] [stderr]    |
[INFO] [stderr] 55 |         let content_type = res.headers().get::<ContentType>();
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_content_type`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `disp`
[INFO] [stderr]   --> src/main.rs:56:13
[INFO] [stderr]    |
[INFO] [stderr] 56 |         let disp = res.headers().get::<ContentDisposition>();
[INFO] [stderr]    |             ^^^^ help: consider prefixing with an underscore: `_disp`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `out_dir`
[INFO] [stderr]   --> src/main.rs:52:40
[INFO] [stderr]    |
[INFO] [stderr] 52 | fn download(core: &mut Core, uri: Uri, out_dir: &Path) -> Result<String, Error> {
[INFO] [stderr]    |                                        ^^^^^^^ help: consider prefixing with an underscore: `_out_dir`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `file_name`
[INFO] [stderr]    --> src/main.rs:115:9
[INFO] [stderr]     |
[INFO] [stderr] 115 |     let file_name = download(&mut core, artifact_uri, out_dir)?;
[INFO] [stderr]     |         ^^^^^^^^^ help: consider prefixing with an underscore: `_file_name`
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `iterator_find_map` has been stable since 1.30.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(iterator_find_map)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `iterator_find_map` has been stable since 1.30.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(iterator_find_map)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.66s
[INFO] running `"docker" "inspect" "15817be967eb4877cc230cee159168033486388a7c902ea6b6c7805a2fa19503"`
[INFO] running `"docker" "rm" "-f" "15817be967eb4877cc230cee159168033486388a7c902ea6b6c7805a2fa19503"`
[INFO] [stdout] 15817be967eb4877cc230cee159168033486388a7c902ea6b6c7805a2fa19503