[INFO] updating cached repository westerhack/quest
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/westerhack/quest
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/westerhack/quest" "work/ex/clippy-test-run/sources/stable/gh/westerhack/quest"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/westerhack/quest'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/westerhack/quest" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/westerhack/quest"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/westerhack/quest'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9f85f79465891f97a4cf091cc4c5aca0635c8b44
[INFO] sha for GitHub repo westerhack/quest: 9f85f79465891f97a4cf091cc4c5aca0635c8b44
[INFO] validating manifest of westerhack/quest 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 westerhack/quest 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 westerhack/quest
[INFO] finished frobbing westerhack/quest
[INFO] frobbed toml for westerhack/quest written to work/ex/clippy-test-run/sources/stable/gh/westerhack/quest/Cargo.toml
[INFO] started frobbing westerhack/quest
[INFO] finished frobbing westerhack/quest
[INFO] frobbed toml for westerhack/quest written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/westerhack/quest/Cargo.toml
[INFO] crate westerhack/quest has a lockfile. skipping
[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 westerhack/quest against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-5/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/westerhack/quest:/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] 243dad9ca03a99cc0770276e0dd34a8c2426d7f47f4311ad4ae5f8c71bd7c937
[INFO] running `"docker" "start" "-a" "243dad9ca03a99cc0770276e0dd34a8c2426d7f47f4311ad4ae5f8c71bd7c937"`
[INFO] [stderr]    Compiling regex v1.0.2
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking simple_logger v0.5.0
[INFO] [stderr]     Checking aho-corasick v0.6.6
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/regex-1.0.2/src/lib.rs:522:34
[INFO] [stderr]     |
[INFO] [stderr] 522 | #![cfg_attr(feature = "pattern", feature(pattern))]
[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 `regex`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "243dad9ca03a99cc0770276e0dd34a8c2426d7f47f4311ad4ae5f8c71bd7c937"`
[INFO] running `"docker" "rm" "-f" "243dad9ca03a99cc0770276e0dd34a8c2426d7f47f4311ad4ae5f8c71bd7c937"`
[INFO] [stdout] 243dad9ca03a99cc0770276e0dd34a8c2426d7f47f4311ad4ae5f8c71bd7c937