[INFO] updating cached repository rokostik/DOCSystem
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rokostik/DOCSystem
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rokostik/DOCSystem" "work/ex/beta-1.38-1/sources/1.37.0/gh/rokostik/DOCSystem"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/rokostik/DOCSystem'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rokostik/DOCSystem" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rokostik/DOCSystem"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rokostik/DOCSystem'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] af2a01cf353a787a2495ecef43b42debd78e984a
[INFO] sha for GitHub repo rokostik/DOCSystem: af2a01cf353a787a2495ecef43b42debd78e984a
[INFO] validating manifest of rokostik/DOCSystem 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 rokostik/DOCSystem 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 rokostik/DOCSystem
[INFO] finished frobbing rokostik/DOCSystem
[INFO] frobbed toml for rokostik/DOCSystem written to work/ex/beta-1.38-1/sources/1.37.0/gh/rokostik/DOCSystem/Cargo.toml
[INFO] started frobbing rokostik/DOCSystem
[INFO] finished frobbing rokostik/DOCSystem
[INFO] frobbed toml for rokostik/DOCSystem written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rokostik/DOCSystem/Cargo.toml
[INFO] crate rokostik/DOCSystem 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 rokostik/DOCSystem 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/rokostik/DOCSystem:/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] d52c709c5d914fc2d115bff857a6dd4dd226271a9a537b79c0a27b2b91ce9191
[INFO] running `"docker" "start" "-a" "d52c709c5d914fc2d115bff857a6dd4dd226271a9a537b79c0a27b2b91ce9191"`
[INFO] [stderr]    Compiling gcc v0.3.41
[INFO] [stderr]    Compiling matches v0.1.4
[INFO] [stderr]    Compiling unicode-normalization v0.1.3
[INFO] [stderr]    Compiling libc v0.2.19
[INFO] [stderr]    Compiling pq-sys v0.2.7
[INFO] [stderr]    Compiling backtrace v0.3.0
[INFO] [stderr]    Compiling unicode-xid v0.0.3
[INFO] [stderr]    Compiling rustc-demangle v0.1.3
[INFO] [stderr]    Compiling quote v0.3.10
[INFO] [stderr]    Compiling cfg-if v0.1.0
[INFO] [stderr]    Compiling byteorder v0.3.13
[INFO] [stderr]    Compiling rustc-serialize v0.3.22
[INFO] [stderr]    Compiling regex-syntax v0.4.0
[INFO] [stderr]    Compiling serde v0.8.22
[INFO] [stderr]    Compiling httparse v1.2.1
[INFO] [stderr]    Compiling unidecode v0.2.0
[INFO] [stderr]    Compiling humansize v0.1.1
[INFO] [stderr]    Compiling redis v0.8.0
[INFO] [stderr]    Compiling pest v0.4.0
[INFO] [stderr]    Compiling sha1 v0.2.0
[INFO] [stderr]    Compiling dbghelp-sys v0.2.0
[INFO] [stderr]    Compiling num-integer v0.1.32
[INFO] [stderr]    Compiling hpack v0.2.0
[INFO] [stderr]    Compiling mime v0.2.2
[INFO] [stderr]    Compiling unicode-bidi v0.2.4
[INFO] [stderr]    Compiling rocket_codegen v0.1.5
[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/rocket_codegen-0.1.5/build.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(slice_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 `rocket_codegen`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "d52c709c5d914fc2d115bff857a6dd4dd226271a9a537b79c0a27b2b91ce9191"`
[INFO] running `"docker" "rm" "-f" "d52c709c5d914fc2d115bff857a6dd4dd226271a9a537b79c0a27b2b91ce9191"`
[INFO] [stdout] d52c709c5d914fc2d115bff857a6dd4dd226271a9a537b79c0a27b2b91ce9191