[INFO] cloning repository https://github.com/nikhilm/threadtimes
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nikhilm/threadtimes" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikhilm%2Fthreadtimes", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikhilm%2Fthreadtimes'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 207511ff6d14b8d7a499d9089c320ef8b8a0f890
[INFO] checking nikhilm/threadtimes against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikhilm%2Fthreadtimes" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/nikhilm/threadtimes
[INFO] finished tweaking git repo https://github.com/nikhilm/threadtimes
[INFO] tweaked toml for git repo https://github.com/nikhilm/threadtimes written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/nikhilm/threadtimes on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/nikhilm/threadtimes already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pest_derive v1.0.8
[INFO] [stderr]   Downloaded handlebars v0.32.4
[INFO] [stderr]   Downloaded simplelog v0.5.3
[INFO] [stderr]   Downloaded failure_derive v0.1.3
[INFO] [stderr]   Downloaded time v0.1.41
[INFO] [stderr]   Downloaded thread-scoped v1.0.2
[INFO] [stderr]   Downloaded pest v1.0.6
[INFO] [stderr]   Downloaded failure v0.1.3
[INFO] [stderr]   Downloaded criterion-plot v0.2.5
[INFO] [stderr]   Downloaded criterion-stats v0.2.5
[INFO] [stderr]   Downloaded cc v1.0.26
[INFO] [stderr]   Downloaded autocfg v0.1.1
[INFO] [stderr]   Downloaded rustc-demangle v0.1.11
[INFO] [stderr]   Downloaded rand v0.4.3
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[INFO] [stderr]   Downloaded criterion v0.2.5
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4835462fffc1831ac1590d90dd369d98730f694835c337500c25209b8bf72756
[INFO] running `Command { std: "docker" "start" "-a" "4835462fffc1831ac1590d90dd369d98730f694835c337500c25209b8bf72756", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4835462fffc1831ac1590d90dd369d98730f694835c337500c25209b8bf72756", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4835462fffc1831ac1590d90dd369d98730f694835c337500c25209b8bf72756", kill_on_drop: false }`
[INFO] [stdout] 4835462fffc1831ac1590d90dd369d98730f694835c337500c25209b8bf72756
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5e5766cd9b04690ff37aa428c825f1ef39df6d46a9a6c42d283da8050af568f2
[INFO] running `Command { std: "docker" "start" "-a" "5e5766cd9b04690ff37aa428c825f1ef39df6d46a9a6c42d283da8050af568f2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling cc v1.0.26
[INFO] [stderr]    Compiling serde v1.0.82
[INFO] [stderr]    Compiling ryu v0.2.7
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling autocfg v0.1.1
[INFO] [stderr]    Compiling failure_derive v0.1.3
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]     Checking byteorder v1.2.7
[INFO] [stderr]    Compiling memchr v2.1.2
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking regex-syntax v0.6.4
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]     Checking rustc-demangle v0.1.11
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking itoa v0.4.3
[INFO] [stderr]     Checking cast v0.2.2
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]    Compiling pest v1.0.6
[INFO] [stderr]    Compiling backtrace v0.3.13
[INFO] [stderr]     Checking term v0.5.1
[INFO] [stderr]     Checking textwrap v0.10.0
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]     Checking quick-error v1.2.2
[INFO] [stderr]     Checking thread-scoped v1.0.2
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]     Checking time v0.1.41
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking num_cpus v1.9.0
[INFO] [stderr]     Checking rand v0.4.3
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.26
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]     Checking itertools-num v0.1.3
[INFO] [stderr]    Compiling syn v0.15.23
[INFO] [stderr]     Checking aho-corasick v0.6.9
[INFO] [stderr]     Checking csv-core v0.1.5
[INFO] [stderr]     Checking criterion-stats v0.2.5
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking criterion-plot v0.2.5
[INFO] [stderr]    Compiling pest_derive v1.0.8
[INFO] [stderr]     Checking simplelog v0.5.3
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling serde_derive v1.0.82
[INFO] [stderr]     Checking serde_json v1.0.33
[INFO] [stderr]     Checking csv v1.0.3
[INFO] [stderr]     Checking failure v0.1.3
[INFO] [stderr]     Checking handlebars v0.32.4
[INFO] [stderr]     Checking criterion v0.2.5
[INFO] [stderr]     Checking threadtimes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/lib_linux.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `uniform_paths` has been stable since 1.32.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(uniform_paths)] 
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib_linux.rs:34:52
[INFO] [stdout]    |
[INFO] [stdout] 34 |     std::fs::read_dir("/proc/self/task").and_then(|mut entries| {
[INFO] [stdout]    |                                                    ----^^^^^^^
[INFO] [stdout]    |                                                    |
[INFO] [stdout]    |                                                    help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib_linux.rs:23:13
[INFO] [stdout]    |
[INFO] [stdout] 23 |             file.read_to_string(&mut contents);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 23 |             let _ = file.read_to_string(&mut contents);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/lib_linux.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `uniform_paths` has been stable since 1.32.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(uniform_paths)] 
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib_linux.rs:34:52
[INFO] [stdout]    |
[INFO] [stdout] 34 |     std::fs::read_dir("/proc/self/task").and_then(|mut entries| {
[INFO] [stdout]    |                                                    ----^^^^^^^
[INFO] [stdout]    |                                                    |
[INFO] [stdout]    |                                                    help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lib_linux.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         for i in 0..1000 {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lib_linux.rs:75:13
[INFO] [stdout]    |
[INFO] [stdout] 75 |         for i in 0..1000 {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib_linux.rs:23:13
[INFO] [stdout]    |
[INFO] [stdout] 23 |             file.read_to_string(&mut contents);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 23 |             let _ = file.read_to_string(&mut contents);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib_linux.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |             writeln!(devnull, "{}", (1..100000).sum::<u64>());
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 60 |             let _ = writeln!(devnull, "{}", (1..100000).sum::<u64>());
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib_linux.rs:76:13
[INFO] [stdout]    |
[INFO] [stdout] 76 |             writeln!(devnull, "{}", (1..100000).sum::<u64>());
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 76 |             let _ = writeln!(devnull, "{}", (1..100000).sum::<u64>());
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> benches/benchmark.rs:37:17
[INFO] [stdout]    |
[INFO] [stdout] 37 |             for i in 0..1000 {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> benches/benchmark.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     for i in 0..threads.capacity() {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> benches/benchmark.rs:38:17
[INFO] [stdout]    |
[INFO] [stdout] 38 |                 writeln!(devnull, "{}", (1..100000).sum::<u64>());
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 38 |                 let _ = writeln!(devnull, "{}", (1..100000).sum::<u64>());
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.32s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.2.5
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 13`
[INFO] running `Command { std: "docker" "inspect" "5e5766cd9b04690ff37aa428c825f1ef39df6d46a9a6c42d283da8050af568f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e5766cd9b04690ff37aa428c825f1ef39df6d46a9a6c42d283da8050af568f2", kill_on_drop: false }`
[INFO] [stdout] 5e5766cd9b04690ff37aa428c825f1ef39df6d46a9a6c42d283da8050af568f2
