[INFO] crate zipkin 0.3.2 is already in cache
[INFO] extracting crate zipkin 0.3.2 into work/ex/clippy-test-run/sources/stable/reg/zipkin/0.3.2
[INFO] extracting crate zipkin 0.3.2 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/zipkin/0.3.2
[INFO] validating manifest of zipkin-0.3.2 on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of zipkin-0.3.2 on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing zipkin-0.3.2
[INFO] finished frobbing zipkin-0.3.2
[INFO] frobbed toml for zipkin-0.3.2 written to work/ex/clippy-test-run/sources/stable/reg/zipkin/0.3.2/Cargo.toml
[INFO] started frobbing zipkin-0.3.2
[INFO] finished frobbing zipkin-0.3.2
[INFO] frobbed toml for zipkin-0.3.2 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/zipkin/0.3.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting zipkin-0.3.2 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-7/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/zipkin/0.3.2:/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" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 54bef3e98c1bb7bd5a420f32f2048ab628f039cf32e7e408e02845f3b032557c
[INFO] running `"docker" "start" "-a" "54bef3e98c1bb7bd5a420f32f2048ab628f039cf32e7e408e02845f3b032557c"`
[INFO] [stderr]     Checking zipkin-types v0.1.0
[INFO] [stderr]     Checking thread-local-object v0.1.0
[INFO] [stderr]     Checking zipkin v0.3.2 (/opt/crater/workdir)
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/sampling_flags.rs:46:20
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn sampled(&self) -> Option<bool> {
[INFO] [stderr]    |                    ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/sampling_flags.rs:55:18
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn debug(&self) -> bool {
[INFO] [stderr]    |                  ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: large size difference between variants
[INFO] [stderr]   --> src/tracer.rs:95:5
[INFO] [stderr]    |
[INFO] [stderr] 95 | /     Real {
[INFO] [stderr] 96 | |         span: span::Builder,
[INFO] [stderr] 97 | |         start_instant: Instant,
[INFO] [stderr] 98 | |     },
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::large_enum_variant)] on by default
[INFO] [stderr] help: consider boxing the large fields to reduce the total size of the enum
[INFO] [stderr]   --> src/tracer.rs:95:5
[INFO] [stderr]    |
[INFO] [stderr] 95 | /     Real {
[INFO] [stderr] 96 | |         span: span::Builder,
[INFO] [stderr] 97 | |         start_instant: Instant,
[INFO] [stderr] 98 | |     },
[INFO] [stderr]    | |_____^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#large_enum_variant
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_none()`
[INFO] [stderr]    --> src/tracer.rs:329:16
[INFO] [stderr]     |
[INFO] [stderr] 329 |           if let None = context.sampled() {
[INFO] [stderr]     |  _________-      ^^^^
[INFO] [stderr] 330 | |             context = trace_context::Builder::from(context)
[INFO] [stderr] 331 | |                 .sampled(self.0.sampler.sample(context.trace_id()))
[INFO] [stderr] 332 | |                 .build();
[INFO] [stderr] ...   |
[INFO] [stderr] 335 | |             shared = false;
[INFO] [stderr] 336 | |         }
[INFO] [stderr]     | |_________- help: try this: `if context.sampled().is_none()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/sampling_flags.rs:46:20
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn sampled(&self) -> Option<bool> {
[INFO] [stderr]    |                    ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/sampling_flags.rs:55:18
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn debug(&self) -> bool {
[INFO] [stderr]    |                  ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: large size difference between variants
[INFO] [stderr]   --> src/tracer.rs:95:5
[INFO] [stderr]    |
[INFO] [stderr] 95 | /     Real {
[INFO] [stderr] 96 | |         span: span::Builder,
[INFO] [stderr] 97 | |         start_instant: Instant,
[INFO] [stderr] 98 | |     },
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::large_enum_variant)] on by default
[INFO] [stderr] help: consider boxing the large fields to reduce the total size of the enum
[INFO] [stderr]   --> src/tracer.rs:95:5
[INFO] [stderr]    |
[INFO] [stderr] 95 | /     Real {
[INFO] [stderr] 96 | |         span: span::Builder,
[INFO] [stderr] 97 | |         start_instant: Instant,
[INFO] [stderr] 98 | |     },
[INFO] [stderr]    | |_____^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#large_enum_variant
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_none()`
[INFO] [stderr]    --> src/tracer.rs:329:16
[INFO] [stderr]     |
[INFO] [stderr] 329 |           if let None = context.sampled() {
[INFO] [stderr]     |  _________-      ^^^^
[INFO] [stderr] 330 | |             context = trace_context::Builder::from(context)
[INFO] [stderr] 331 | |                 .sampled(self.0.sampler.sample(context.trace_id()))
[INFO] [stderr] 332 | |                 .build();
[INFO] [stderr] ...   |
[INFO] [stderr] 335 | |             shared = false;
[INFO] [stderr] 336 | |         }
[INFO] [stderr]     | |_________- help: try this: `if context.sampled().is_none()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.92s
[INFO] running `"docker" "inspect" "54bef3e98c1bb7bd5a420f32f2048ab628f039cf32e7e408e02845f3b032557c"`
[INFO] running `"docker" "rm" "-f" "54bef3e98c1bb7bd5a420f32f2048ab628f039cf32e7e408e02845f3b032557c"`
[INFO] [stdout] 54bef3e98c1bb7bd5a420f32f2048ab628f039cf32e7e408e02845f3b032557c