[INFO] updating cached repository aergonaut/railgun
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/aergonaut/railgun
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/aergonaut/railgun" "work/ex/beta-1.37-6/sources/1.36.0/gh/aergonaut/railgun"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/aergonaut/railgun'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/aergonaut/railgun" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/aergonaut/railgun"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/aergonaut/railgun'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 213c546da9b79786d38f18ee67bdd2ab73034232
[INFO] sha for GitHub repo aergonaut/railgun: 213c546da9b79786d38f18ee67bdd2ab73034232
[INFO] validating manifest of aergonaut/railgun 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 aergonaut/railgun 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 aergonaut/railgun
[INFO] finished frobbing aergonaut/railgun
[INFO] frobbed toml for aergonaut/railgun written to work/ex/beta-1.37-6/sources/1.36.0/gh/aergonaut/railgun/Cargo.toml
[INFO] started frobbing aergonaut/railgun
[INFO] finished frobbing aergonaut/railgun
[INFO] frobbed toml for aergonaut/railgun written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/aergonaut/railgun/Cargo.toml
[INFO] crate aergonaut/railgun 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] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing aergonaut/railgun against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/aergonaut/railgun:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 551534c9b196ae8968601dc83bc4959084f74859018445667f7f2cd7d91a5557
[INFO] running `"docker" "start" "-a" "551534c9b196ae8968601dc83bc4959084f74859018445667f7f2cd7d91a5557"`
[INFO] [stderr]    Compiling rayon-core v1.0.0
[INFO] [stderr]    Compiling deque v0.3.2
[INFO] [stderr]    Compiling pq-sys v0.4.3
[INFO] [stderr]    Compiling version_check v0.1.0
[INFO] [stderr]    Compiling untrusted v0.3.2
[INFO] [stderr]    Compiling term v0.4.5
[INFO] [stderr]    Compiling httparse v1.2.2
[INFO] [stderr]    Compiling uuid v0.4.0
[INFO] [stderr]    Compiling state v0.2.1
[INFO] [stderr]    Compiling serde v1.0.2
[INFO] [stderr]    Compiling smallvec v0.3.3
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/state-0.2.1/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(const_fn)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]    Compiling pear v0.0.8
[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 `state`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "551534c9b196ae8968601dc83bc4959084f74859018445667f7f2cd7d91a5557"`
[INFO] running `"docker" "rm" "-f" "551534c9b196ae8968601dc83bc4959084f74859018445667f7f2cd7d91a5557"`
[INFO] [stdout] 551534c9b196ae8968601dc83bc4959084f74859018445667f7f2cd7d91a5557