[INFO] updating cached repository nixpulvis/lambash
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/nixpulvis/lambash
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/nixpulvis/lambash" "work/ex/beta-1.38-1/sources/1.37.0/gh/nixpulvis/lambash"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/nixpulvis/lambash'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nixpulvis/lambash" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nixpulvis/lambash"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nixpulvis/lambash'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7e6e3dd244a1c63c15edeb74706e402e7d1dc1ac
[INFO] sha for GitHub repo nixpulvis/lambash: 7e6e3dd244a1c63c15edeb74706e402e7d1dc1ac
[INFO] validating manifest of nixpulvis/lambash 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 nixpulvis/lambash 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 nixpulvis/lambash
[INFO] removed path dependency lalrpop-lambda from nixpulvis/lambash
[INFO] finished frobbing nixpulvis/lambash
[INFO] frobbed toml for nixpulvis/lambash written to work/ex/beta-1.38-1/sources/1.37.0/gh/nixpulvis/lambash/Cargo.toml
[INFO] started frobbing nixpulvis/lambash
[INFO] removed path dependency lalrpop-lambda from nixpulvis/lambash
[INFO] finished frobbing nixpulvis/lambash
[INFO] frobbed toml for nixpulvis/lambash written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nixpulvis/lambash/Cargo.toml
[INFO] crate nixpulvis/lambash 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]     Updating crates.io index
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/nixpulvis/lambash/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[INFO] the lockfile is outdated, regenerating it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 nixpulvis/lambash 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/nixpulvis/lambash:/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] 968083058d5302f753d52444ff0826ec64d56f7af394984f2fc60e19e8a13bfb
[INFO] running `"docker" "start" "-a" "968083058d5302f753d52444ff0826ec64d56f7af394984f2fc60e19e8a13bfb"`
[INFO] [stderr] warning: dependency (lalrpop-lambda) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]    Compiling lalrpop-util v0.17.1
[INFO] [stderr]    Compiling ena v0.13.0
[INFO] [stderr]    Compiling serde_derive v1.0.99
[INFO] [stderr]    Compiling ascii-canvas v2.0.0
[INFO] [stderr]    Compiling serde v1.0.99
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]    Compiling lalrpop v0.17.1
[INFO] [stderr]    Compiling lalrpop-lambda v0.6.1
[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/lalrpop-lambda-0.6.1/src/lib.rs:42:1
[INFO] [stderr]    |
[INFO] [stderr] 42 | / #![feature(non_ascii_idents,
[INFO] [stderr] 43 | |            box_syntax,
[INFO] [stderr] 44 | |            box_patterns,
[INFO] [stderr] 45 | |            fn_traits,
[INFO] [stderr] 46 | |            unboxed_closures)]
[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 `lalrpop-lambda`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "968083058d5302f753d52444ff0826ec64d56f7af394984f2fc60e19e8a13bfb"`
[INFO] running `"docker" "rm" "-f" "968083058d5302f753d52444ff0826ec64d56f7af394984f2fc60e19e8a13bfb"`
[INFO] [stdout] 968083058d5302f753d52444ff0826ec64d56f7af394984f2fc60e19e8a13bfb