[INFO] updating cached repository samgiles/porter-stemmer
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/samgiles/porter-stemmer
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/samgiles/porter-stemmer" "work/ex/beta-1.38-1/sources/1.37.0/gh/samgiles/porter-stemmer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/samgiles/porter-stemmer'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/samgiles/porter-stemmer" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/samgiles/porter-stemmer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/samgiles/porter-stemmer'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7ef0f83b4a04cfc8373acac4a9642bf483e0c614
[INFO] sha for GitHub repo samgiles/porter-stemmer: 7ef0f83b4a04cfc8373acac4a9642bf483e0c614
[INFO] validating manifest of samgiles/porter-stemmer 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 samgiles/porter-stemmer 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 samgiles/porter-stemmer
[INFO] finished frobbing samgiles/porter-stemmer
[INFO] frobbed toml for samgiles/porter-stemmer written to work/ex/beta-1.38-1/sources/1.37.0/gh/samgiles/porter-stemmer/Cargo.toml
[INFO] started frobbing samgiles/porter-stemmer
[INFO] finished frobbing samgiles/porter-stemmer
[INFO] frobbed toml for samgiles/porter-stemmer written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/samgiles/porter-stemmer/Cargo.toml
[INFO] crate samgiles/porter-stemmer 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/samgiles/porter-stemmer/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[INFO] the lockfile is outdated, regenerating it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 samgiles/porter-stemmer 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/samgiles/porter-stemmer:/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] ee32be1f73be3fc36763639e0c5f82ef7d0a2f9b695fb2206e9f618f756deae6
[INFO] running `"docker" "start" "-a" "ee32be1f73be3fc36763639e0c5f82ef7d0a2f9b695fb2206e9f618f756deae6"`
[INFO] [stderr]    Compiling porter-stemmer v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(test)]
[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 `porter-stemmer`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ee32be1f73be3fc36763639e0c5f82ef7d0a2f9b695fb2206e9f618f756deae6"`
[INFO] running `"docker" "rm" "-f" "ee32be1f73be3fc36763639e0c5f82ef7d0a2f9b695fb2206e9f618f756deae6"`
[INFO] [stdout] ee32be1f73be3fc36763639e0c5f82ef7d0a2f9b695fb2206e9f618f756deae6