[INFO] crate vectorize_struct 0.1.3 is already in cache
[INFO] extracting crate vectorize_struct 0.1.3 into work/ex/clippy-test-run/sources/stable/reg/vectorize_struct/0.1.3
[INFO] extracting crate vectorize_struct 0.1.3 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/vectorize_struct/0.1.3
[INFO] validating manifest of vectorize_struct-0.1.3 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 vectorize_struct-0.1.3 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 vectorize_struct-0.1.3
[INFO] finished frobbing vectorize_struct-0.1.3
[INFO] frobbed toml for vectorize_struct-0.1.3 written to work/ex/clippy-test-run/sources/stable/reg/vectorize_struct/0.1.3/Cargo.toml
[INFO] started frobbing vectorize_struct-0.1.3
[INFO] finished frobbing vectorize_struct-0.1.3
[INFO] frobbed toml for vectorize_struct-0.1.3 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/vectorize_struct/0.1.3/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 vectorize_struct-0.1.3 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/vectorize_struct/0.1.3:/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] b1c0975efdfb49ff810cdc30b7b42db469f05f7043155abd23daf815f3e6e8b7
[INFO] running `"docker" "start" "-a" "b1c0975efdfb49ff810cdc30b7b42db469f05f7043155abd23daf815f3e6e8b7"`
[INFO] [stderr] warning: library `vectorize_struct` should only specify `proc-macro = true` instead of setting `crate-type`
[INFO] [stderr]     Checking proc-macro2 v0.4.26
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]     Checking quote v0.6.11
[INFO] [stderr]     Checking vectorize_struct v0.1.3 (/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:190:5
[INFO] [stderr]     |
[INFO] [stderr] 190 |     result
[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:163:18
[INFO] [stderr]     |
[INFO] [stderr] 163 |       let result = quote!(
[INFO] [stderr]     |  __________________^
[INFO] [stderr] 164 | |         #strct
[INFO] [stderr] 165 | |
[INFO] [stderr] 166 | |         mod #mod_ident {
[INFO] [stderr] ...   |
[INFO] [stderr] 187 | |
[INFO] [stderr] 188 | |     ).into();
[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:190:5
[INFO] [stderr]     |
[INFO] [stderr] 190 |     result
[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:163:18
[INFO] [stderr]     |
[INFO] [stderr] 163 |       let result = quote!(
[INFO] [stderr]     |  __________________^
[INFO] [stderr] 164 | |         #strct
[INFO] [stderr] 165 | |
[INFO] [stderr] 166 | |         mod #mod_ident {
[INFO] [stderr] ...   |
[INFO] [stderr] 187 | |
[INFO] [stderr] 188 | |     ).into();
[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] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> tests/test.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(specialization)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `vectorize_struct`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b1c0975efdfb49ff810cdc30b7b42db469f05f7043155abd23daf815f3e6e8b7"`
[INFO] running `"docker" "rm" "-f" "b1c0975efdfb49ff810cdc30b7b42db469f05f7043155abd23daf815f3e6e8b7"`
[INFO] [stdout] b1c0975efdfb49ff810cdc30b7b42db469f05f7043155abd23daf815f3e6e8b7