[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-1.38-1/sources/1.37.0/gh/aergonaut/railgun"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/aergonaut/railgun'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/aergonaut/railgun" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/aergonaut/railgun"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of aergonaut/railgun 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 aergonaut/railgun [INFO] finished frobbing aergonaut/railgun [INFO] frobbed toml for aergonaut/railgun written to work/ex/beta-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "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 aergonaut/railgun 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-5/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/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-2019-08-13" "build" "--frozen"` [INFO] [stdout] 7032c163c25a834f2057dfbc711f0bdf7d62258fa946aab86c8821b5d7c95a0d [INFO] running `"docker" "start" "-a" "7032c163c25a834f2057dfbc711f0bdf7d62258fa946aab86c8821b5d7c95a0d"` [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 untrusted v0.3.2 [INFO] [stderr] Compiling version_check v0.1.0 [INFO] [stderr] Compiling uuid v0.4.0 [INFO] [stderr] Compiling state v0.2.1 [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" "7032c163c25a834f2057dfbc711f0bdf7d62258fa946aab86c8821b5d7c95a0d"` [INFO] running `"docker" "rm" "-f" "7032c163c25a834f2057dfbc711f0bdf7d62258fa946aab86c8821b5d7c95a0d"` [INFO] [stdout] 7032c163c25a834f2057dfbc711f0bdf7d62258fa946aab86c8821b5d7c95a0d