[INFO] fetching crate mylogger 0.1.0...
[INFO] checking mylogger-0.1.0 against try#8a749131e7beb72f6edacefd2bdcbed3d67b2112 for pr-72331
[INFO] extracting crate mylogger 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate mylogger 0.1.0 on toolchain 8a749131e7beb72f6edacefd2bdcbed3d67b2112
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate mylogger 0.1.0
[INFO] finished tweaking crates.io crate mylogger 0.1.0
[INFO] tweaked toml for crates.io crate mylogger 0.1.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7b1ee7fc89dcc834900e78004c0d209b394e556502e67ed081c267876ab1a0e5
[INFO] running `"docker" "start" "-a" "7b1ee7fc89dcc834900e78004c0d209b394e556502e67ed081c267876ab1a0e5"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking mylogger v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused imports: `LevelFilter`, `info`
[INFO] [stderr]   --> src/lib.rs:72:11
[INFO] [stderr]    |
[INFO] [stderr] 72 | use log::{info, Level, LevelFilter, Log, Metadata, Record};
[INFO] [stderr]    |           ^^^^         ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `meta`
[INFO] [stderr]    --> src/lib.rs:136:24
[INFO] [stderr]     |
[INFO] [stderr] 136 |     fn activate(&self, meta: &Metadata) -> bool {
[INFO] [stderr]     |                        ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `record`
[INFO] [stderr]    --> src/lib.rs:139:19
[INFO] [stderr]     |
[INFO] [stderr] 139 |     fn log(&self, record: &Record, logger: &MyLogger) {}
[INFO] [stderr]     |                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_record`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `logger`
[INFO] [stderr]    --> src/lib.rs:139:36
[INFO] [stderr]     |
[INFO] [stderr] 139 |     fn log(&self, record: &Record, logger: &MyLogger) {}
[INFO] [stderr]     |                                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_logger`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `logger`
[INFO] [stderr]    --> src/lib.rs:140:29
[INFO] [stderr]     |
[INFO] [stderr] 140 |     fn format_record(&self, logger: &MyLogger, record: &Record) -> String {
[INFO] [stderr]     |                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_logger`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `level`
[INFO] [stderr]   --> src/lib.rs:90:13
[INFO] [stderr]    |
[INFO] [stderr] 90 |         let level = Level::Info;
[INFO] [stderr]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_level`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `metadata`
[INFO] [stderr]    --> src/lib.rs:112:23
[INFO] [stderr]     |
[INFO] [stderr] 112 |     fn enabled(&self, metadata: &Metadata) -> bool {
[INFO] [stderr]     |                       ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_metadata`
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `meta`
[INFO] [stderr]    --> src/lib.rs:136:24
[INFO] [stderr]     |
[INFO] [stderr] 136 |     fn activate(&self, meta: &Metadata) -> bool {
[INFO] [stderr]     |                        ^^^^ help: if this is intentional, prefix it with an underscore: `_meta`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `record`
[INFO] [stderr]    --> src/lib.rs:139:19
[INFO] [stderr]     |
[INFO] [stderr] 139 |     fn log(&self, record: &Record, logger: &MyLogger) {}
[INFO] [stderr]     |                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_record`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `logger`
[INFO] [stderr]    --> src/lib.rs:139:36
[INFO] [stderr]     |
[INFO] [stderr] 139 |     fn log(&self, record: &Record, logger: &MyLogger) {}
[INFO] [stderr]     |                                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_logger`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `logger`
[INFO] [stderr]    --> src/lib.rs:140:29
[INFO] [stderr]     |
[INFO] [stderr] 140 |     fn format_record(&self, logger: &MyLogger, record: &Record) -> String {
[INFO] [stderr]     |                             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_logger`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `level`
[INFO] [stderr]   --> src/lib.rs:90:13
[INFO] [stderr]    |
[INFO] [stderr] 90 |         let level = Level::Info;
[INFO] [stderr]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_level`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `metadata`
[INFO] [stderr]    --> src/lib.rs:112:23
[INFO] [stderr]     |
[INFO] [stderr] 112 |     fn enabled(&self, metadata: &Metadata) -> bool {
[INFO] [stderr]     |                       ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_metadata`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:76:9
[INFO] [stderr]    |
[INFO] [stderr] 76 |     let mut mylogger = MyLogger::with_default_handler("asdf");
[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: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/lib.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 |     log::set_boxed_logger(Box::new(mylogger)).map(|()| log::set_max_level(LevelFilter::Info));
[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: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `"docker" "inspect" "7b1ee7fc89dcc834900e78004c0d209b394e556502e67ed081c267876ab1a0e5"`
[INFO] running `"docker" "rm" "-f" "7b1ee7fc89dcc834900e78004c0d209b394e556502e67ed081c267876ab1a0e5"`
[INFO] [stdout] 7b1ee7fc89dcc834900e78004c0d209b394e556502e67ed081c267876ab1a0e5