[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#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikhilm%2Fthreadtimes" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/nikhilm/threadtimes on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [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-0-tc1/source/Cargo.toml [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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded same-file v1.0.4 [INFO] [stderr] Downloaded walkdir v2.2.7 [INFO] [stderr] Downloaded simplelog v0.5.3 [INFO] [stderr] Downloaded winapi-util v0.1.1 [INFO] [stderr] Downloaded chrono v0.4.6 [INFO] [stderr] Downloaded textwrap v0.10.0 [INFO] [stderr] Downloaded criterion-plot v0.2.5 [INFO] [stderr] Downloaded rustc-demangle v0.1.11 [INFO] [stderr] Downloaded term v0.5.1 [INFO] [stderr] Downloaded criterion-stats v0.2.5 [INFO] [stderr] Downloaded cast v0.2.2 [INFO] [stderr] Downloaded aho-corasick v0.6.9 [INFO] [stderr] Downloaded memchr v2.1.2 [INFO] [stderr] Downloaded cc v1.0.26 [INFO] [stderr] Downloaded backtrace v0.3.13 [INFO] [stderr] Downloaded clap v2.32.0 [INFO] [stderr] Downloaded regex-syntax v0.6.4 [INFO] [stderr] Downloaded backtrace-sys v0.1.26 [INFO] [stderr] Downloaded regex v1.1.0 [INFO] [stderr] Downloaded csv v1.0.3 [INFO] [stderr] Downloaded libc v0.2.45 [INFO] [stderr] Downloaded syn v0.15.23 [INFO] [stderr] Downloaded criterion v0.2.5 [INFO] [stderr] Downloaded handlebars v0.32.4 [INFO] [stderr] Downloaded serde v1.0.82 [INFO] [stderr] Downloaded itertools v0.7.11 [INFO] [stderr] Downloaded time v0.1.41 [INFO] [stderr] Downloaded num-traits v0.2.6 [INFO] [stderr] Downloaded num_cpus v1.9.0 [INFO] [stderr] Downloaded thread-scoped v1.0.2 [INFO] [stderr] Downloaded autocfg v0.1.1 [INFO] [stderr] Downloaded utf8-ranges v1.0.2 [INFO] [stderr] Downloaded either v1.5.0 [INFO] [stderr] Downloaded itertools-num v0.1.3 [INFO] [stderr] Downloaded serde_derive v1.0.82 [INFO] [stderr] Downloaded redox_syscall v0.1.44 [INFO] [stderr] Downloaded lazy_static v1.2.0 [INFO] [stderr] Downloaded num-integer v0.1.39 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 0f6c96c77ffe16d07af9e0d94d7195e8c3eb6825329d7f7f56aae02ec181b898 [INFO] running `Command { std: "docker" "start" "-a" "0f6c96c77ffe16d07af9e0d94d7195e8c3eb6825329d7f7f56aae02ec181b898", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "0f6c96c77ffe16d07af9e0d94d7195e8c3eb6825329d7f7f56aae02ec181b898", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0f6c96c77ffe16d07af9e0d94d7195e8c3eb6825329d7f7f56aae02ec181b898", kill_on_drop: false }` [INFO] [stdout] 0f6c96c77ffe16d07af9e0d94d7195e8c3eb6825329d7f7f56aae02ec181b898 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 693c48c65471b269161646380ca3c3eb44c1e1e897da45e16e1d5fdcdac6ed03 [INFO] running `Command { std: "docker" "start" "-a" "693c48c65471b269161646380ca3c3eb44c1e1e897da45e16e1d5fdcdac6ed03", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.45 [INFO] [stderr] Checking cfg-if v0.1.6 [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 memchr v2.1.2 [INFO] [stderr] Compiling num-integer v0.1.39 [INFO] [stderr] Compiling autocfg v0.1.1 [INFO] [stderr] Compiling unicode-xid v0.0.4 [INFO] [stderr] Compiling ryu v0.2.7 [INFO] [stderr] Compiling backtrace v0.3.13 [INFO] [stderr] Compiling synom v0.11.3 [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 quote v0.6.10 [INFO] [stderr] Checking lazy_static v1.2.0 [INFO] [stderr] Checking ucd-util v0.1.3 [INFO] [stderr] Compiling syn v0.15.23 [INFO] [stderr] Compiling quote v0.3.15 [INFO] [stderr] Checking aho-corasick v0.6.9 [INFO] [stderr] Compiling backtrace-sys v0.1.26 [INFO] [stderr] Checking regex-syntax v0.6.4 [INFO] [stderr] Checking thread_local v0.3.6 [INFO] [stderr] Compiling syn v0.11.11 [INFO] [stderr] Checking time v0.1.41 [INFO] [stderr] Checking log v0.4.6 [INFO] [stderr] Checking rustc-demangle v0.1.11 [INFO] [stderr] Checking itoa v0.4.3 [INFO] [stderr] Checking cast v0.2.2 [INFO] [stderr] Checking either v1.5.0 [INFO] [stderr] Checking unicode-width v0.1.5 [INFO] [stderr] Compiling pest v1.0.6 [INFO] [stderr] Checking utf8-ranges v1.0.2 [INFO] [stderr] Checking textwrap v0.10.0 [INFO] [stderr] Checking itertools v0.7.11 [INFO] [stderr] Checking chrono v0.4.6 [INFO] [stderr] Checking csv-core v0.1.5 [INFO] [stderr] Checking term v0.5.1 [INFO] [stderr] Checking num_cpus v1.9.0 [INFO] [stderr] Checking rand v0.4.3 [INFO] [stderr] Checking atty v0.2.11 [INFO] [stderr] Checking same-file v1.0.4 [INFO] [stderr] Checking bitflags v1.0.4 [INFO] [stderr] Checking thread-scoped v1.0.2 [INFO] [stderr] Checking vec_map v0.8.1 [INFO] [stderr] Checking quick-error v1.2.2 [INFO] [stderr] Checking walkdir v2.2.7 [INFO] [stderr] Checking simplelog v0.5.3 [INFO] [stderr] Checking clap v2.32.0 [INFO] [stderr] Checking criterion-plot v0.2.5 [INFO] [stderr] Checking itertools-num v0.1.3 [INFO] [stderr] Checking criterion-stats v0.2.5 [INFO] [stderr] Compiling pest_derive v1.0.8 [INFO] [stderr] Compiling synstructure v0.10.1 [INFO] [stderr] Checking serde_json v1.0.33 [INFO] [stderr] Checking csv v1.0.3 [INFO] [stderr] Compiling serde_derive v1.0.82 [INFO] [stderr] Checking handlebars v0.32.4 [INFO] [stderr] Checking failure v0.1.3 [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)]` on by default [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)]` 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: 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)]` 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)]` 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)]` 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)]` 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 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: 4 warnings emitted [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)]` 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::()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info) [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::()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [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] = note: `#[warn(unused_variables)]` on by default [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] [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::()); [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)]` on by default [INFO] [stdout] = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.33s [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 3` [INFO] running `Command { std: "docker" "inspect" "693c48c65471b269161646380ca3c3eb44c1e1e897da45e16e1d5fdcdac6ed03", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "693c48c65471b269161646380ca3c3eb44c1e1e897da45e16e1d5fdcdac6ed03", kill_on_drop: false }` [INFO] [stdout] 693c48c65471b269161646380ca3c3eb44c1e1e897da45e16e1d5fdcdac6ed03