[INFO] fetching crate executors 0.4.1...
[INFO] extracting crate executors 0.4.1 into work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/reg/executors/0.4.1
[INFO] extracting crate executors 0.4.1 into work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/reg/executors/0.4.1
[INFO] validating manifest of executors-0.4.1 on toolchain master#c0086b9e8972fef9fd4af24bae20d45021ed06c6
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of executors-0.4.1 on toolchain try#290ac7b29f41ff9fa5232f9a1116ea71a3501063
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing executors-0.4.1
[INFO] finished frobbing executors-0.4.1
[INFO] frobbed toml for executors-0.4.1 written to work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/reg/executors/0.4.1/Cargo.toml
[INFO] started frobbing executors-0.4.1
[INFO] finished frobbing executors-0.4.1
[INFO] frobbed toml for executors-0.4.1 written to work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/reg/executors/0.4.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking executors-0.4.1 against master#c0086b9e8972fef9fd4af24bae20d45021ed06c6 for pr-58899
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58899/worker-2/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/reg/executors/0.4.1:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 310ddb03a0114ba629f62e12a38da6b907a9dd13978f2c06707d3e79fc21a819
[INFO] running `"docker" "start" "-a" "310ddb03a0114ba629f62e12a38da6b907a9dd13978f2c06707d3e79fc21a819"`
[INFO] [stderr]     Checking synchronoise v0.4.0
[INFO] [stderr]     Checking executors v0.4.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `common::LogErrors`
[INFO] [stderr]   --> src/lib.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 | use common::LogErrors;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `common::LogErrors`
[INFO] [stderr]   --> src/lib.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 | use common::LogErrors;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `NS_PER_S`
[INFO] [stderr]  --> src/timeconstants.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub const NS_PER_S: u64 = 1_000_000_000;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `US_PER_S`
[INFO] [stderr]   --> src/timeconstants.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub const US_PER_S: u64 = 1_000_000;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `US_PER_MS`
[INFO] [stderr]   --> src/timeconstants.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub const US_PER_MS: u64 = 1_000;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `NS_PER_US`
[INFO] [stderr]   --> src/timeconstants.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub const NS_PER_US: u64 = 1_000;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `a`
[INFO] [stderr]    --> src/common.rs:168:9
[INFO] [stderr]     |
[INFO] [stderr] 168 |         a: u32,
[INFO] [stderr]     |         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `b`
[INFO] [stderr]    --> src/common.rs:169:9
[INFO] [stderr]     |
[INFO] [stderr] 169 |         b: f64,
[INFO] [stderr]     |         ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `c`
[INFO] [stderr]    --> src/common.rs:170:9
[INFO] [stderr]     |
[INFO] [stderr] 170 |         c: bool,
[INFO] [stderr]     |         ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `NS_PER_S`
[INFO] [stderr]  --> src/timeconstants.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub const NS_PER_S: u64 = 1_000_000_000;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `US_PER_S`
[INFO] [stderr]   --> src/timeconstants.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub const US_PER_S: u64 = 1_000_000;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `US_PER_MS`
[INFO] [stderr]   --> src/timeconstants.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub const US_PER_MS: u64 = 1_000;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `NS_PER_US`
[INFO] [stderr]   --> src/timeconstants.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub const NS_PER_US: u64 = 1_000;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/crossbeam_workstealing_pool.rs:612:9
[INFO] [stderr]     |
[INFO] [stderr] 612 |         pool.shutdown();
[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: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/crossbeam_workstealing_pool.rs:635:9
[INFO] [stderr]     |
[INFO] [stderr] 635 |         pool.shutdown();
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/crossbeam_workstealing_pool.rs:651:9
[INFO] [stderr]     |
[INFO] [stderr] 651 |         pool.shutdown();
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/crossbeam_workstealing_pool.rs:670:9
[INFO] [stderr]     |
[INFO] [stderr] 670 |         pool.shutdown();
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.11s
[INFO] running `"docker" "inspect" "310ddb03a0114ba629f62e12a38da6b907a9dd13978f2c06707d3e79fc21a819"`
[INFO] running `"docker" "rm" "-f" "310ddb03a0114ba629f62e12a38da6b907a9dd13978f2c06707d3e79fc21a819"`
[INFO] [stdout] 310ddb03a0114ba629f62e12a38da6b907a9dd13978f2c06707d3e79fc21a819