[INFO] fetching crate quantum_log 0.3.0...
[INFO] checking quantum_log-0.3.0 against try#dcc22e5232dd0dbe95a4b3ab84c8d24a0880771e for pr-153721
[INFO] extracting crate quantum_log 0.3.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate quantum_log 0.3.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate quantum_log 0.3.0
[INFO] tweaked toml for crates.io crate quantum_log 0.3.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate quantum_log 0.3.0 on toolchain dcc22e5232dd0dbe95a4b3ab84c8d24a0880771e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dcc22e5232dd0dbe95a4b3ab84c8d24a0880771e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate quantum_log 0.3.0 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" "+dcc22e5232dd0dbe95a4b3ab84c8d24a0880771e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3e793bdf10248eb2ddbd6b0faebed8155c11b4589982e2893733958d93e8d540" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] c4287df7af8591974d50bc12891e9f4afd3647ad6494f5880e78d9812a0d7e99
[INFO] running `Command { std: "docker" "start" "c4287df7af8591974d50bc12891e9f4afd3647ad6494f5880e78d9812a0d7e99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "c4287df7af8591974d50bc12891e9f4afd3647ad6494f5880e78d9812a0d7e99" "/opt/rustwide/cargo-home/bin/cargo" "+dcc22e5232dd0dbe95a4b3ab84c8d24a0880771e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c4287df7af8591974d50bc12891e9f4afd3647ad6494f5880e78d9812a0d7e99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "c4287df7af8591974d50bc12891e9f4afd3647ad6494f5880e78d9812a0d7e99" "/opt/rustwide/cargo-home/bin/cargo" "+dcc22e5232dd0dbe95a4b3ab84c8d24a0880771e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stdout] warning: unused import: `std::ffi::OsString`
[INFO] [stdout]  --> src/utils/background_info.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ffi::OsString;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::os::unix::fs::MetadataExt`
[INFO] [stdout]    --> src/utils/file_tools.rs:361:13
[INFO] [stdout]     |
[INFO] [stdout] 361 |         use std::os::unix::fs::MetadataExt;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `QuantumSink`
[INFO] [stdout]   --> src/core/layers/dispatcher.rs:12:28
[INFO] [stdout]    |
[INFO] [stdout] 12 | use crate::sinks::traits::{QuantumSink, SinkError, StackableSink};
[INFO] [stdout]    |                            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Duration` and `sleep`
[INFO] [stdout]    --> src/sinks/default_stdout.rs:521:23
[INFO] [stdout]     |
[INFO] [stdout] 521 |     use tokio::time::{sleep, Duration};
[INFO] [stdout]     |                       ^^^^^  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ffi::OsString`
[INFO] [stdout]  --> src/utils/background_info.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ffi::OsString;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::os::unix::fs::MetadataExt`
[INFO] [stdout]    --> src/utils/file_tools.rs:361:13
[INFO] [stdout]     |
[INFO] [stdout] 361 |         use std::os::unix::fs::MetadataExt;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `required_bytes`
[INFO] [stdout]    --> src/utils/file_tools.rs:360:63
[INFO] [stdout]     |
[INFO] [stdout] 360 |     pub fn has_sufficient_disk_space<P: AsRef<Path>>(path: P, required_bytes: u64) -> bool {
[INFO] [stdout]     |                                                               ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_required_bytes`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `metadata`
[INFO] [stdout]    --> src/utils/file_tools.rs:363:19
[INFO] [stdout]     |
[INFO] [stdout] 363 |         if let Ok(metadata) = fs::metadata(path) {
[INFO] [stdout]     |                   ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_metadata`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PipelineBuilder`
[INFO] [stdout]   --> examples/sink_trait_usage.rs:15:50
[INFO] [stdout]    |
[INFO] [stdout] 15 |         ErrorStrategy, Pipeline, PipelineConfig, PipelineBuilder,
[INFO] [stdout]    |                                                  ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> examples/complete_examples.rs:415:9
[INFO] [stdout]     |
[INFO] [stdout] 415 |     let mut all_examples = examples;
[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 import: `QuantumSink`
[INFO] [stdout]   --> src/core/layers/dispatcher.rs:12:28
[INFO] [stdout]    |
[INFO] [stdout] 12 | use crate::sinks::traits::{QuantumSink, SinkError, StackableSink};
[INFO] [stdout]    |                            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `metadata`
[INFO] [stdout]    --> src/core/layers/pre_init_buffer.rs:322:13
[INFO] [stdout]     |
[INFO] [stdout] 322 |         let metadata = tracing::Metadata::new(
[INFO] [stdout]     |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_metadata`
[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/core/layers/pre_init_buffer.rs:350:13
[INFO] [stdout]     |
[INFO] [stdout] 350 |         for i in 0..5 {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]    --> src/core/subscriber.rs:321:13
[INFO] [stdout]     |
[INFO] [stdout] 321 |         let result = subscriber.initialize().await;
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]    --> src/core/subscriber.rs:346:13
[INFO] [stdout]     |
[INFO] [stdout] 346 |         let result = std::panic::catch_unwind(|| {
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]    --> src/core/subscriber.rs:354:13
[INFO] [stdout]     |
[INFO] [stdout] 354 |         let result = std::panic::catch_unwind(|| {
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]    --> src/core/subscriber.rs:360:13
[INFO] [stdout]     |
[INFO] [stdout] 360 |         let result = std::panic::catch_unwind(|| {
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file_path`
[INFO] [stdout]    --> src/sinks/file.rs:365:13
[INFO] [stdout]     |
[INFO] [stdout] 365 |         let file_path = temp_dir.path().join("test.log");
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file_path`
[INFO] [stdout]    --> src/sinks/file.rs:388:13
[INFO] [stdout]     |
[INFO] [stdout] 388 |         let file_path = temp_dir.path().join("test.log");
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file_path`
[INFO] [stdout]    --> src/sinks/file.rs:529:13
[INFO] [stdout]     |
[INFO] [stdout] 529 |         let file_path = temp_dir.path().join("test.log");
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_file_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `metadata`
[INFO] [stdout]    --> src/sinks/stdout.rs:139:13
[INFO] [stdout]     |
[INFO] [stdout] 139 |         let metadata = tracing::Metadata::new(
[INFO] [stdout]     |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_metadata`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `strategy`
[INFO] [stdout]    --> src/sinks/stdout.rs:259:13
[INFO] [stdout]     |
[INFO] [stdout] 259 |         let strategy = crate::config::BackpressureStrategy::Block;
[INFO] [stdout]     |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_strategy`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `required_bytes`
[INFO] [stdout]    --> src/utils/file_tools.rs:360:63
[INFO] [stdout]     |
[INFO] [stdout] 360 |     pub fn has_sufficient_disk_space<P: AsRef<Path>>(path: P, required_bytes: u64) -> bool {
[INFO] [stdout]     |                                                               ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_required_bytes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `metadata`
[INFO] [stdout]    --> src/utils/file_tools.rs:363:19
[INFO] [stdout]     |
[INFO] [stdout] 363 |         if let Ok(metadata) = fs::metadata(path) {
[INFO] [stdout]     |                   ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_metadata`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `with_failure` is never used
[INFO] [stdout]    --> src/sinks/pipeline.rs:606:12
[INFO] [stdout]     |
[INFO] [stdout] 597 |     impl MockStackableSink {
[INFO] [stdout]     |     ---------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 606 |         fn with_failure(mut self) -> Self {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MockExclusiveSink` is never constructed
[INFO] [stdout]    --> src/sinks/pipeline.rs:667:12
[INFO] [stdout]     |
[INFO] [stdout] 667 |     struct MockExclusiveSink {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `with_failure`, and `event_count` are never used
[INFO] [stdout]    --> src/sinks/pipeline.rs:674:12
[INFO] [stdout]     |
[INFO] [stdout] 673 |     impl MockExclusiveSink {
[INFO] [stdout]     |     ---------------------- associated items in this implementation
[INFO] [stdout] 674 |         fn new(name: &str) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 682 |         fn with_failure(mut self) -> Self {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 687 |         fn event_count(&self) -> u64 {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 32.08s
[INFO] running `Command { std: "docker" "inspect" "c4287df7af8591974d50bc12891e9f4afd3647ad6494f5880e78d9812a0d7e99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4287df7af8591974d50bc12891e9f4afd3647ad6494f5880e78d9812a0d7e99", kill_on_drop: false }`
[INFO] [stdout] c4287df7af8591974d50bc12891e9f4afd3647ad6494f5880e78d9812a0d7e99
