[INFO] updating cached repository nikhilm/threadtimes
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/nikhilm/threadtimes
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/nikhilm/threadtimes" "work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/nikhilm/threadtimes"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/nikhilm/threadtimes'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nikhilm/threadtimes" "work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/nikhilm/threadtimes"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/nikhilm/threadtimes'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 207511ff6d14b8d7a499d9089c320ef8b8a0f890
[INFO] sha for GitHub repo nikhilm/threadtimes: 207511ff6d14b8d7a499d9089c320ef8b8a0f890
[INFO] validating manifest of nikhilm/threadtimes on toolchain master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of nikhilm/threadtimes on toolchain try#58b21121d0b447ceb3f1a655155d802191acf044
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing nikhilm/threadtimes
[INFO] finished frobbing nikhilm/threadtimes
[INFO] frobbed toml for nikhilm/threadtimes written to work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/nikhilm/threadtimes/Cargo.toml
[INFO] started frobbing nikhilm/threadtimes
[INFO] finished frobbing nikhilm/threadtimes
[INFO] frobbed toml for nikhilm/threadtimes written to work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/nikhilm/threadtimes/Cargo.toml
[INFO] crate nikhilm/threadtimes already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking nikhilm/threadtimes against try#58b21121d0b447ceb3f1a655155d802191acf044 for pr-61100
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-61100/worker-0/try#58b21121d0b447ceb3f1a655155d802191acf044:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/nikhilm/threadtimes:/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" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] fc31de10176f0d217a27c33cd416fcb714d0cece09cafa5fea278ef7989ca547
[INFO] running `"docker" "start" "-a" "fc31de10176f0d217a27c33cd416fcb714d0cece09cafa5fea278ef7989ca547"`
[INFO] [stderr]     Checking csv v1.0.3
[INFO] [stderr]     Checking criterion v0.2.5
[INFO] [stderr]     Checking threadtimes v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]  --> src/lib_linux.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib_linux.rs:34:52
[INFO] [stderr]    |
[INFO] [stderr] 34 |     std::fs::read_dir("/proc/self/task").and_then(|mut entries| {
[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: the feature `uniform_paths` has been stable since 1.32.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(uniform_paths)] 
[INFO] [stderr]   |            ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/lib_linux.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |             file.read_to_string(&mut contents);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]  --> src/lib_linux.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/lib_linux.rs:59:13
[INFO] [stderr]    |
[INFO] [stderr] 59 |         for i in 0..1000 {
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/lib_linux.rs:75:13
[INFO] [stderr]    |
[INFO] [stderr] 75 |         for i in 0..1000 {
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib_linux.rs:34:52
[INFO] [stderr]    |
[INFO] [stderr] 34 |     std::fs::read_dir("/proc/self/task").and_then(|mut entries| {
[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: the feature `uniform_paths` has been stable since 1.32.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(uniform_paths)] 
[INFO] [stderr]   |            ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/lib_linux.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |             file.read_to_string(&mut contents);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/lib_linux.rs:60:13
[INFO] [stderr]    |
[INFO] [stderr] 60 |             writeln!(devnull, "{}", (1..100000).sum::<u64>());
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/lib_linux.rs:76:13
[INFO] [stderr]    |
[INFO] [stderr] 76 |             writeln!(devnull, "{}", (1..100000).sum::<u64>());
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> benches/benchmark.rs:37:17
[INFO] [stderr]    |
[INFO] [stderr] 37 |             for i in 0..1000 {
[INFO] [stderr]    |                 ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> benches/benchmark.rs:30:9
[INFO] [stderr]    |
[INFO] [stderr] 30 |     for i in 0..threads.capacity() {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> benches/benchmark.rs:38:17
[INFO] [stderr]    |
[INFO] [stderr] 38 |                 writeln!(devnull, "{}", (1..100000).sum::<u64>());
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.09s
[INFO] running `"docker" "inspect" "fc31de10176f0d217a27c33cd416fcb714d0cece09cafa5fea278ef7989ca547"`
[INFO] running `"docker" "rm" "-f" "fc31de10176f0d217a27c33cd416fcb714d0cece09cafa5fea278ef7989ca547"`
[INFO] [stdout] fc31de10176f0d217a27c33cd416fcb714d0cece09cafa5fea278ef7989ca547