[INFO] updating cached repository iamdanfox/qwirkler
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/iamdanfox/qwirkler
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/iamdanfox/qwirkler" "work/ex/beta-1.38-1/sources/1.37.0/gh/iamdanfox/qwirkler"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/iamdanfox/qwirkler'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/iamdanfox/qwirkler" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/iamdanfox/qwirkler"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/iamdanfox/qwirkler'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0e3cdd0bfd61ced33684c54a0d657d13b1becf3d
[INFO] sha for GitHub repo iamdanfox/qwirkler: 0e3cdd0bfd61ced33684c54a0d657d13b1becf3d
[INFO] validating manifest of iamdanfox/qwirkler 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 iamdanfox/qwirkler 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 iamdanfox/qwirkler
[INFO] finished frobbing iamdanfox/qwirkler
[INFO] frobbed toml for iamdanfox/qwirkler written to work/ex/beta-1.38-1/sources/1.37.0/gh/iamdanfox/qwirkler/Cargo.toml
[INFO] started frobbing iamdanfox/qwirkler
[INFO] finished frobbing iamdanfox/qwirkler
[INFO] frobbed toml for iamdanfox/qwirkler written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/iamdanfox/qwirkler/Cargo.toml
[INFO] crate iamdanfox/qwirkler already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/iamdanfox/qwirkler/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing iamdanfox/qwirkler against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/iamdanfox/qwirkler:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 18ad20caebcdb20eb52132b42df9bf9f6eca1b3da28dfd6410da03d011392419
[INFO] running `"docker" "start" "-a" "18ad20caebcdb20eb52132b42df9bf9f6eca1b3da28dfd6410da03d011392419"`
[INFO] [stderr]    Compiling qwirkler v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(convert)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `gamestate::GameState`
[INFO] [stderr]  --> src/bench.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use gamestate::GameState;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Colour`, `Shape`
[INFO] [stderr]  --> src/linevalidator.rs:1:20
[INFO] [stderr]   |
[INFO] [stderr] 1 | use piece::{Piece, Colour, Shape};
[INFO] [stderr]   |                    ^^^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `qwirkler`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "18ad20caebcdb20eb52132b42df9bf9f6eca1b3da28dfd6410da03d011392419"`
[INFO] running `"docker" "rm" "-f" "18ad20caebcdb20eb52132b42df9bf9f6eca1b3da28dfd6410da03d011392419"`
[INFO] [stdout] 18ad20caebcdb20eb52132b42df9bf9f6eca1b3da28dfd6410da03d011392419