[INFO] crate ruma-api-macros 0.3.0 is already in cache
[INFO] extracting crate ruma-api-macros 0.3.0 into work/ex/clippy-test-run/sources/stable/reg/ruma-api-macros/0.3.0
[INFO] extracting crate ruma-api-macros 0.3.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/ruma-api-macros/0.3.0
[INFO] validating manifest of ruma-api-macros-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 ruma-api-macros-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 ruma-api-macros-0.3.0
[INFO] finished frobbing ruma-api-macros-0.3.0
[INFO] frobbed toml for ruma-api-macros-0.3.0 written to work/ex/clippy-test-run/sources/stable/reg/ruma-api-macros/0.3.0/Cargo.toml
[INFO] started frobbing ruma-api-macros-0.3.0
[INFO] finished frobbing ruma-api-macros-0.3.0
[INFO] frobbed toml for ruma-api-macros-0.3.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/ruma-api-macros/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 ruma-api-macros-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-1/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/ruma-api-macros/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] 9e8a3221f38766e4d40bca4101c9070230599206171fb72b4ca54e89b8d94532
[INFO] running `"docker" "start" "-a" "9e8a3221f38766e4d40bca4101c9070230599206171fb72b4ca54e89b8d94532"`
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling lazycell v1.2.1
[INFO] [stderr]    Compiling string v0.1.3
[INFO] [stderr]    Compiling crossbeam-utils v0.6.5
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]    Compiling tokio-io v0.1.11
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling mio v0.6.16
[INFO] [stderr]     Checking ruma-identifiers v0.11.0
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[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/ruma-identifiers-0.11.0/src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(try_from)]
[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 `ruma-identifiers`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "9e8a3221f38766e4d40bca4101c9070230599206171fb72b4ca54e89b8d94532"`
[INFO] running `"docker" "rm" "-f" "9e8a3221f38766e4d40bca4101c9070230599206171fb72b4ca54e89b8d94532"`
[INFO] [stdout] 9e8a3221f38766e4d40bca4101c9070230599206171fb72b4ca54e89b8d94532