[INFO] updating cached repository AaronKutch/ptr_rotate_bench_demonstration
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/AaronKutch/ptr_rotate_bench_demonstration
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/AaronKutch/ptr_rotate_bench_demonstration" "work/ex/beta-1.37-6/sources/1.36.0/gh/AaronKutch/ptr_rotate_bench_demonstration"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/AaronKutch/ptr_rotate_bench_demonstration'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/AaronKutch/ptr_rotate_bench_demonstration" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/AaronKutch/ptr_rotate_bench_demonstration"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/AaronKutch/ptr_rotate_bench_demonstration'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2781f1745183d78d6f9ee83e71a9c3f9dd858f00
[INFO] sha for GitHub repo AaronKutch/ptr_rotate_bench_demonstration: 2781f1745183d78d6f9ee83e71a9c3f9dd858f00
[INFO] validating manifest of AaronKutch/ptr_rotate_bench_demonstration on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of AaronKutch/ptr_rotate_bench_demonstration on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing AaronKutch/ptr_rotate_bench_demonstration
[INFO] finished frobbing AaronKutch/ptr_rotate_bench_demonstration
[INFO] frobbed toml for AaronKutch/ptr_rotate_bench_demonstration written to work/ex/beta-1.37-6/sources/1.36.0/gh/AaronKutch/ptr_rotate_bench_demonstration/Cargo.toml
[INFO] started frobbing AaronKutch/ptr_rotate_bench_demonstration
[INFO] finished frobbing AaronKutch/ptr_rotate_bench_demonstration
[INFO] frobbed toml for AaronKutch/ptr_rotate_bench_demonstration written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/AaronKutch/ptr_rotate_bench_demonstration/Cargo.toml
[INFO] crate AaronKutch/ptr_rotate_bench_demonstration already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing AaronKutch/ptr_rotate_bench_demonstration against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/AaronKutch/ptr_rotate_bench_demonstration:/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=warn" "-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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 00209370c52d32c39e6ba283491fc5db15ade69f778f59e70c751a4b2e762632
[INFO] running `"docker" "start" "-a" "00209370c52d32c39e6ba283491fc5db15ade69f778f59e70c751a4b2e762632"`
[INFO] [stderr]    Compiling rotate_bench v0.0.0 (/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(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Bencher`, `black_box`
[INFO] [stderr]  --> src/main.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 | use test::{black_box, Bencher};
[INFO] [stderr]   |            ^^^^^^^^^  ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]    --> src/main.rs:243:1
[INFO] [stderr]     |
[INFO] [stderr] 243 | / macro_rules! rotate_bench {
[INFO] [stderr] 244 | |     ($bench_name_old:ident, $bench_name_new:ident, $len:expr, $s:expr) => {
[INFO] [stderr] 245 | |         #[bench]
[INFO] [stderr] 246 | |         fn $bench_name_old(b: &mut Bencher) {
[INFO] [stderr] ...   |
[INFO] [stderr] 262 | |     };
[INFO] [stderr] 263 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_macros)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]    --> src/main.rs:265:1
[INFO] [stderr]     |
[INFO] [stderr] 265 | / macro_rules! rotate {
[INFO] [stderr] 266 | |     ($fn_old:ident, $fn_new:ident, $n:expr, $mapper:expr) => {
[INFO] [stderr] 267 | |         #[bench]
[INFO] [stderr] 268 | |         fn $fn_old(b: &mut Bencher) {
[INFO] [stderr] ...   |
[INFO] [stderr] 288 | |     }
[INFO] [stderr] 289 | | }
[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 `rotate_bench`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "00209370c52d32c39e6ba283491fc5db15ade69f778f59e70c751a4b2e762632"`
[INFO] running `"docker" "rm" "-f" "00209370c52d32c39e6ba283491fc5db15ade69f778f59e70c751a4b2e762632"`
[INFO] [stdout] 00209370c52d32c39e6ba283491fc5db15ade69f778f59e70c751a4b2e762632