[INFO] updating cached repository redsift/kdb-rs-hash
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/redsift/kdb-rs-hash
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/redsift/kdb-rs-hash" "work/ex/beta-1.37-6/sources/1.36.0/gh/redsift/kdb-rs-hash"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/redsift/kdb-rs-hash'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/redsift/kdb-rs-hash" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/redsift/kdb-rs-hash"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/redsift/kdb-rs-hash'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5fb552612bf86a7b64c807d0ae5c684e8a8ce855
[INFO] sha for GitHub repo redsift/kdb-rs-hash: 5fb552612bf86a7b64c807d0ae5c684e8a8ce855
[INFO] validating manifest of redsift/kdb-rs-hash 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 redsift/kdb-rs-hash 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 redsift/kdb-rs-hash
[INFO] finished frobbing redsift/kdb-rs-hash
[INFO] frobbed toml for redsift/kdb-rs-hash written to work/ex/beta-1.37-6/sources/1.36.0/gh/redsift/kdb-rs-hash/Cargo.toml
[INFO] started frobbing redsift/kdb-rs-hash
[INFO] finished frobbing redsift/kdb-rs-hash
[INFO] frobbed toml for redsift/kdb-rs-hash written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/redsift/kdb-rs-hash/Cargo.toml
[INFO] crate redsift/kdb-rs-hash 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 redsift/kdb-rs-hash 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-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/redsift/kdb-rs-hash:/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] bb3f16290611f24d20c6319e644e63612f30eb76747c0116df9c6013734e619d
[INFO] running `"docker" "start" "-a" "bb3f16290611f24d20c6319e644e63612f30eb76747c0116df9c6013734e619d"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.13
[INFO] [stderr]    Compiling fasthash v0.3.2
[INFO] [stderr]    Compiling fasthash-sys v0.3.2
[INFO] [stderr]    Compiling xoroshiro128 v0.3.0
[INFO] [stderr]    Compiling quote v0.6.6
[INFO] [stderr]    Compiling syn v0.14.8
[INFO] [stderr]    Compiling rkdb v0.2.0
[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/rkdb-0.2.0/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(lang_items, box_patterns)]
[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 `rkdb`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "bb3f16290611f24d20c6319e644e63612f30eb76747c0116df9c6013734e619d"`
[INFO] running `"docker" "rm" "-f" "bb3f16290611f24d20c6319e644e63612f30eb76747c0116df9c6013734e619d"`
[INFO] [stdout] bb3f16290611f24d20c6319e644e63612f30eb76747c0116df9c6013734e619d