[INFO] updating cached repository PaulGrandperrin/playground
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/PaulGrandperrin/playground
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/PaulGrandperrin/playground" "work/ex/clippy-test-run/sources/stable/gh/PaulGrandperrin/playground"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/PaulGrandperrin/playground'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/PaulGrandperrin/playground" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/PaulGrandperrin/playground"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/PaulGrandperrin/playground'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8c7a591f61653f011e744c9832fbf54bcdd3c709
[INFO] sha for GitHub repo PaulGrandperrin/playground: 8c7a591f61653f011e744c9832fbf54bcdd3c709
[INFO] validating manifest of PaulGrandperrin/playground 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 PaulGrandperrin/playground 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 PaulGrandperrin/playground
[INFO] finished frobbing PaulGrandperrin/playground
[INFO] frobbed toml for PaulGrandperrin/playground written to work/ex/clippy-test-run/sources/stable/gh/PaulGrandperrin/playground/Cargo.toml
[INFO] started frobbing PaulGrandperrin/playground
[INFO] finished frobbing PaulGrandperrin/playground
[INFO] frobbed toml for PaulGrandperrin/playground written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/PaulGrandperrin/playground/Cargo.toml
[INFO] crate PaulGrandperrin/playground 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 PaulGrandperrin/playground 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/gh/PaulGrandperrin/playground:/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] f0aecb54599a8fc9247ff80df4701abcbc05034c41b6b0b5f0682f7b8cff01eb
[INFO] running `"docker" "start" "-a" "f0aecb54599a8fc9247ff80df4701abcbc05034c41b6b0b5f0682f7b8cff01eb"`
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]     Checking rustc-demangle v0.1.10
[INFO] [stderr]     Checking num-complex v0.2.1
[INFO] [stderr]     Checking bincode v1.0.1
[INFO] [stderr]     Checking num-iter v0.1.37
[INFO] [stderr]     Checking backtrace v0.3.13
[INFO] [stderr]     Checking failure v0.1.3
[INFO] [stderr]     Checking num-rational v0.2.1
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking playground v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | / #![feature(
[INFO] [stderr] 2 | |     trivial_bounds,
[INFO] [stderr] 3 | |     try_from,
[INFO] [stderr] 4 | |     non_exhaustive,
[INFO] [stderr] ... |
[INFO] [stderr] 8 | |     never_type
[INFO] [stderr] 9 | | )]
[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 `playground`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | / #![feature(
[INFO] [stderr] 2 | |     trivial_bounds,
[INFO] [stderr] 3 | |     try_from,
[INFO] [stderr] 4 | |     non_exhaustive,
[INFO] [stderr] ... |
[INFO] [stderr] 8 | |     never_type
[INFO] [stderr] 9 | | )]
[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 `playground`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f0aecb54599a8fc9247ff80df4701abcbc05034c41b6b0b5f0682f7b8cff01eb"`
[INFO] running `"docker" "rm" "-f" "f0aecb54599a8fc9247ff80df4701abcbc05034c41b6b0b5f0682f7b8cff01eb"`
[INFO] [stdout] f0aecb54599a8fc9247ff80df4701abcbc05034c41b6b0b5f0682f7b8cff01eb