[INFO] crate display-as-proc-macro 0.3.0 is already in cache
[INFO] extracting crate display-as-proc-macro 0.3.0 into work/ex/clippy-test-run/sources/stable/reg/display-as-proc-macro/0.3.0
[INFO] extracting crate display-as-proc-macro 0.3.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/display-as-proc-macro/0.3.0
[INFO] validating manifest of display-as-proc-macro-0.3.0 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 display-as-proc-macro-0.3.0 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 display-as-proc-macro-0.3.0
[INFO] finished frobbing display-as-proc-macro-0.3.0
[INFO] frobbed toml for display-as-proc-macro-0.3.0 written to work/ex/clippy-test-run/sources/stable/reg/display-as-proc-macro/0.3.0/Cargo.toml
[INFO] started frobbing display-as-proc-macro-0.3.0
[INFO] finished frobbing display-as-proc-macro-0.3.0
[INFO] frobbed toml for display-as-proc-macro-0.3.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/display-as-proc-macro/0.3.0/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 display-as-proc-macro-0.3.0 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-4/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/display-as-proc-macro/0.3.0:/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] 26021f37908f55029d5d26bf366823cba7397b25e9c037e9f500c9b2f52f4f5a
[INFO] running `"docker" "start" "-a" "26021f37908f55029d5d26bf366823cba7397b25e9c037e9f500c9b2f52f4f5a"`
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]    Compiling proc-macro-hack v0.5.4
[INFO] [stderr]     Checking display-as-proc-macro v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/lib.rs:391:5
[INFO] [stderr]     |
[INFO] [stderr] 391 |     new_impl
[INFO] [stderr]     |     ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::let_and_return)] on by default
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/lib.rs:388:20
[INFO] [stderr]     |
[INFO] [stderr] 388 |     let new_impl = new_impl.into_iter().collect();
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/lib.rs:391:5
[INFO] [stderr]     |
[INFO] [stderr] 391 |     new_impl
[INFO] [stderr]     |     ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::let_and_return)] on by default
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/lib.rs:388:20
[INFO] [stderr]     |
[INFO] [stderr] 388 |     let new_impl = new_impl.into_iter().collect();
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/lib.rs:47:13
[INFO] [stderr]    |
[INFO] [stderr] 47 |             s.len() > 0 && s.contains("\"") && s.chars().next() != Some('b')
[INFO] [stderr]    |             ^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!s.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]   --> src/lib.rs:47:39
[INFO] [stderr]    |
[INFO] [stderr] 47 |             s.len() > 0 && s.contains("\"") && s.chars().next() != Some('b')
[INFO] [stderr]    |                                       ^^^^ help: try using a char instead: `'\"'`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_char_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: you should use the `starts_with` method
[INFO] [stderr]   --> src/lib.rs:47:48
[INFO] [stderr]    |
[INFO] [stderr] 47 |             s.len() > 0 && s.contains("\"") && s.chars().next() != Some('b')
[INFO] [stderr]    |                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!s.starts_with('b')`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::chars_next_cmp)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#chars_next_cmp
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:140:8
[INFO] [stderr]     |
[INFO] [stderr] 140 |     if writer.len() == 0 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `writer.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:179:15
[INFO] [stderr]     |
[INFO] [stderr] 179 |     } else if expr.len() > 0 {
[INFO] [stderr]     |               ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!expr.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]    --> src/lib.rs:273:34
[INFO] [stderr]     |
[INFO] [stderr] 273 |                 next_expr.extend(to_tokens(";").into_iter());
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `to_tokens(";")`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/lib.rs:47:13
[INFO] [stderr]    |
[INFO] [stderr] 47 |             s.len() > 0 && s.contains("\"") && s.chars().next() != Some('b')
[INFO] [stderr]    |             ^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!s.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]   --> src/lib.rs:47:39
[INFO] [stderr]    |
[INFO] [stderr] 47 |             s.len() > 0 && s.contains("\"") && s.chars().next() != Some('b')
[INFO] [stderr]    |                                       ^^^^ help: try using a char instead: `'\"'`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_char_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: you should use the `starts_with` method
[INFO] [stderr]   --> src/lib.rs:47:48
[INFO] [stderr]    |
[INFO] [stderr] 47 |             s.len() > 0 && s.contains("\"") && s.chars().next() != Some('b')
[INFO] [stderr]    |                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: like this: `!s.starts_with('b')`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::chars_next_cmp)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#chars_next_cmp
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:140:8
[INFO] [stderr]     |
[INFO] [stderr] 140 |     if writer.len() == 0 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `writer.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:179:15
[INFO] [stderr]     |
[INFO] [stderr] 179 |     } else if expr.len() > 0 {
[INFO] [stderr]     |               ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!expr.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]    --> src/lib.rs:273:34
[INFO] [stderr]     |
[INFO] [stderr] 273 |                 next_expr.extend(to_tokens(";").into_iter());
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `to_tokens(";")`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.08s
[INFO] running `"docker" "inspect" "26021f37908f55029d5d26bf366823cba7397b25e9c037e9f500c9b2f52f4f5a"`
[INFO] running `"docker" "rm" "-f" "26021f37908f55029d5d26bf366823cba7397b25e9c037e9f500c9b2f52f4f5a"`
[INFO] [stdout] 26021f37908f55029d5d26bf366823cba7397b25e9c037e9f500c9b2f52f4f5a