[INFO] fetching crate fast_log 1.2.7...
[INFO] checking fast_log-1.2.7 against master#0dce3f606e05cffab7361c132a399d3550ab0df8 for pr-78376
[INFO] extracting crate fast_log 1.2.7 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate fast_log 1.2.7 on toolchain 0dce3f606e05cffab7361c132a399d3550ab0df8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fast_log 1.2.7
[INFO] finished tweaking crates.io crate fast_log 1.2.7
[INFO] tweaked toml for crates.io crate fast_log 1.2.7 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 76a5c1b92b92c8247b41939bcef7d21b9c55bbcabda7e288f8f2b5191d4559fb
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "76a5c1b92b92c8247b41939bcef7d21b9c55bbcabda7e288f8f2b5191d4559fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "76a5c1b92b92c8247b41939bcef7d21b9c55bbcabda7e288f8f2b5191d4559fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76a5c1b92b92c8247b41939bcef7d21b9c55bbcabda7e288f8f2b5191d4559fb", kill_on_drop: false }`
[INFO] [stdout] 76a5c1b92b92c8247b41939bcef7d21b9c55bbcabda7e288f8f2b5191d4559fb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5c58b95b20a126c1151d303a88f6b1b0f0782cff5b0fa12119f18557db1bc793
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5c58b95b20a126c1151d303a88f6b1b0f0782cff5b0fa12119f18557db1bc793", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]     Checking crossbeam-channel v0.4.4
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking serde_json v1.0.59
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking fast_log v1.2.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `File`, `OpenOptions`
[INFO] [stdout]  --> src/fast_log.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs::{File, OpenOptions};
[INFO] [stdout]   |               ^^^^  ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]  --> src/fast_log.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::path::Path;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `AtomicBool`, `AtomicI8`
[INFO] [stdout]  --> src/fast_log.rs:4:25
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::sync::atomic::{AtomicBool, AtomicI32, AtomicI8};
[INFO] [stdout]   |                         ^^^^^^^^^^             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::SystemTime`
[INFO] [stdout]  --> src/fast_log.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::time::SystemTime;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `RecvError`
[INFO] [stdout]  --> src/fast_log.rs:9:44
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crossbeam_channel::{bounded, Receiver, RecvError, SendError};
[INFO] [stdout]   |                                            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log::info`
[INFO] [stdout]   --> src/fast_log.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use log::info;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::error::LogError`
[INFO] [stdout]   --> src/fast_log.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use crate::error::LogError;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::time_util`
[INFO] [stdout]   --> src/fast_log.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use crate::time_util;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::RwLock`
[INFO] [stdout]  --> src/plugin/file.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::sync::RwLock;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log::Level`
[INFO] [stdout]  --> src/plugin/file.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use log::Level;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `File`, `OpenOptions`
[INFO] [stdout]  --> src/fast_log.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs::{File, OpenOptions};
[INFO] [stdout]   |               ^^^^  ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]  --> src/fast_log.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::path::Path;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `AtomicBool`, `AtomicI8`
[INFO] [stdout]  --> src/fast_log.rs:4:25
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::sync::atomic::{AtomicBool, AtomicI32, AtomicI8};
[INFO] [stdout]   |                         ^^^^^^^^^^             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `RecvError`
[INFO] [stdout]  --> src/fast_log.rs:9:44
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crossbeam_channel::{bounded, Receiver, RecvError, SendError};
[INFO] [stdout]   |                                            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::error::LogError`
[INFO] [stdout]   --> src/fast_log.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use crate::error::LogError;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::RwLock`
[INFO] [stdout]  --> src/plugin/file.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::sync::RwLock;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log::Level`
[INFO] [stdout]  --> src/plugin/file.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use log::Level;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> src/fast_log.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Write;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> src/fast_log.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Write;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `e`
[INFO] [stdout]   --> src/error.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn e() -> Result<String, LogError> {
[INFO] [stdout]    |    ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/fast_log.rs:117:29
[INFO] [stdout]     |
[INFO] [stdout] 117 | ...                   lock.as_ref().unwrap().send(&data);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/fast_log.rs:185:5
[INFO] [stdout]     |
[INFO] [stdout] 185 |     init_log("requests.log", 1000, log::Level::Info, None);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/plugin/file.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |         self.file.write(info.as_bytes());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/plugin/file.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |         self.file.flush();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/fast_log.rs:117:29
[INFO] [stdout]     |
[INFO] [stdout] 117 | ...                   lock.as_ref().unwrap().send(&data);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/plugin/file.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |         self.file.write(info.as_bytes());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/plugin/file.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |         self.file.flush();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.85s
[INFO] running `Command { std: "docker" "inspect" "5c58b95b20a126c1151d303a88f6b1b0f0782cff5b0fa12119f18557db1bc793", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c58b95b20a126c1151d303a88f6b1b0f0782cff5b0fa12119f18557db1bc793", kill_on_drop: false }`
[INFO] [stdout] 5c58b95b20a126c1151d303a88f6b1b0f0782cff5b0fa12119f18557db1bc793