[INFO] crate zipkin-types 0.1.0 is already in cache
[INFO] extracting crate zipkin-types 0.1.0 into work/ex/clippy-test-run/sources/stable/reg/zipkin-types/0.1.0
[INFO] extracting crate zipkin-types 0.1.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/zipkin-types/0.1.0
[INFO] validating manifest of zipkin-types-0.1.0 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-types-0.1.0 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-types-0.1.0
[INFO] finished frobbing zipkin-types-0.1.0
[INFO] frobbed toml for zipkin-types-0.1.0 written to work/ex/clippy-test-run/sources/stable/reg/zipkin-types/0.1.0/Cargo.toml
[INFO] started frobbing zipkin-types-0.1.0
[INFO] finished frobbing zipkin-types-0.1.0
[INFO] frobbed toml for zipkin-types-0.1.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/zipkin-types/0.1.0/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-types-0.1.0 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-types/0.1.0:/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] 0302bed59828d4cef92a6667eb5593201a21e50138915a2e80a22c701ba4a827
[INFO] running `"docker" "start" "-a" "0302bed59828d4cef92a6667eb5593201a21e50138915a2e80a22c701ba4a827"`
[INFO] [stderr]     Checking data-encoding v2.1.2
[INFO] [stderr]     Checking zipkin-types v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: use as_ref() instead
[INFO] [stderr]    --> src/span_id.rs:136:9
[INFO] [stderr]     |
[INFO] [stderr] 136 | /         match self.0 {
[INFO] [stderr] 137 | |             Some(ref e) => Some(e),
[INFO] [stderr] 138 | |             None => None,
[INFO] [stderr] 139 | |         }
[INFO] [stderr]     | |_________^ help: try this: `self.0.as_ref()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_as_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_as_ref
[INFO] [stderr] 
[INFO] [stderr] warning: use as_ref() instead
[INFO] [stderr]    --> src/span_id.rs:136:9
[INFO] [stderr]     |
[INFO] [stderr] 136 | /         match self.0 {
[INFO] [stderr] 137 | |             Some(ref e) => Some(e),
[INFO] [stderr] 138 | |             None => None,
[INFO] [stderr] 139 | |         }
[INFO] [stderr]     | |_________^ help: try this: `self.0.as_ref()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_as_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_as_ref
[INFO] [stderr] 
[INFO] [stderr] warning: use as_ref() instead
[INFO] [stderr]    --> src/trace_id.rs:159:9
[INFO] [stderr]     |
[INFO] [stderr] 159 | /         match self.0 {
[INFO] [stderr] 160 | |             Some(ref e) => Some(e),
[INFO] [stderr] 161 | |             None => None,
[INFO] [stderr] 162 | |         }
[INFO] [stderr]     | |_________^ help: try this: `self.0.as_ref()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_as_ref
[INFO] [stderr] 
[INFO] [stderr] warning: use as_ref() instead
[INFO] [stderr]    --> src/trace_id.rs:159:9
[INFO] [stderr]     |
[INFO] [stderr] 159 | /         match self.0 {
[INFO] [stderr] 160 | |             Some(ref e) => Some(e),
[INFO] [stderr] 161 | |             None => None,
[INFO] [stderr] 162 | |         }
[INFO] [stderr]     | |_________^ help: try this: `self.0.as_ref()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_as_ref
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.12s
[INFO] running `"docker" "inspect" "0302bed59828d4cef92a6667eb5593201a21e50138915a2e80a22c701ba4a827"`
[INFO] running `"docker" "rm" "-f" "0302bed59828d4cef92a6667eb5593201a21e50138915a2e80a22c701ba4a827"`
[INFO] [stdout] 0302bed59828d4cef92a6667eb5593201a21e50138915a2e80a22c701ba4a827