[INFO] crate algo 0.1.9 is already in cache
[INFO] extracting crate algo 0.1.9 into work/ex/beta-1.38-1/sources/1.37.0/reg/algo/0.1.9
[INFO] extracting crate algo 0.1.9 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/algo/0.1.9
[INFO] validating manifest of algo-0.1.9 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of algo-0.1.9 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing algo-0.1.9
[INFO] finished frobbing algo-0.1.9
[INFO] frobbed toml for algo-0.1.9 written to work/ex/beta-1.38-1/sources/1.37.0/reg/algo/0.1.9/Cargo.toml
[INFO] started frobbing algo-0.1.9
[INFO] finished frobbing algo-0.1.9
[INFO] frobbed toml for algo-0.1.9 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/algo/0.1.9/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing algo-0.1.9 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/algo/0.1.9:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 81960583cdaf052c26cd2280dea8030e7647f7bbf8e2c207296c535ffe48113e
[INFO] running `"docker" "start" "-a" "81960583cdaf052c26cd2280dea8030e7647f7bbf8e2c207296c535ffe48113e"`
[INFO] [stderr]    Compiling algo v0.1.9 (/opt/crater/workdir)
[INFO] [stderr] error: unexpected token: `...`
[INFO] [stderr]   --> src/search/max_subarray.rs:41:56
[INFO] [stderr]    |
[INFO] [stderr] 41 |     let (left_idx, left_max) = cross_part_max(arr, (low...mid).rev());
[INFO] [stderr]    |                                                        ^^^
[INFO] [stderr] help: use `..` for an exclusive range
[INFO] [stderr]    |
[INFO] [stderr] 41 |     let (left_idx, left_max) = cross_part_max(arr, (low..mid).rev());
[INFO] [stderr]    |                                                        ^^
[INFO] [stderr] help: or `..=` for an inclusive range
[INFO] [stderr]    |
[INFO] [stderr] 41 |     let (left_idx, left_max) = cross_part_max(arr, (low..=mid).rev());
[INFO] [stderr]    |                                                        ^^^
[INFO] [stderr] 
[INFO] [stderr] error: unexpected token: `...`
[INFO] [stderr]   --> src/search/max_subarray.rs:42:63
[INFO] [stderr]    |
[INFO] [stderr] 42 |     let (right_idx, right_max) = cross_part_max(arr, (mid + 1)...high);
[INFO] [stderr]    |                                                               ^^^
[INFO] [stderr] help: use `..` for an exclusive range
[INFO] [stderr]    |
[INFO] [stderr] 42 |     let (right_idx, right_max) = cross_part_max(arr, (mid + 1)..high);
[INFO] [stderr]    |                                                               ^^
[INFO] [stderr] help: or `..=` for an inclusive range
[INFO] [stderr]    |
[INFO] [stderr] 42 |     let (right_idx, right_max) = cross_part_max(arr, (mid + 1)..=high);
[INFO] [stderr]    |                                                               ^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved imports `std::num::Zero`, `std::num::One`
[INFO] [stderr]  --> src/math/gcd.rs:1:16
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::num::{Zero, One};
[INFO] [stderr]   |                ^^^^  ^^^ no `One` in `num`
[INFO] [stderr]   |                |
[INFO] [stderr]   |                no `Zero` in `num`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::num::Zero`
[INFO] [stderr]  --> src/math/lcm.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::num::Zero;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^ no `Zero` in `num`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(zero_one, inclusive_range_syntax)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `algo`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "81960583cdaf052c26cd2280dea8030e7647f7bbf8e2c207296c535ffe48113e"`
[INFO] running `"docker" "rm" "-f" "81960583cdaf052c26cd2280dea8030e7647f7bbf8e2c207296c535ffe48113e"`
[INFO] [stdout] 81960583cdaf052c26cd2280dea8030e7647f7bbf8e2c207296c535ffe48113e