[INFO] updating cached repository monorkin/stanko.io-backend
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/monorkin/stanko.io-backend
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/monorkin/stanko.io-backend" "work/ex/beta-1.37-6/sources/1.36.0/gh/monorkin/stanko.io-backend"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/monorkin/stanko.io-backend'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/monorkin/stanko.io-backend" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/monorkin/stanko.io-backend"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/monorkin/stanko.io-backend'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b5a3d80aff54d474bce4a0c89e5fda41a7940e81
[INFO] sha for GitHub repo monorkin/stanko.io-backend: b5a3d80aff54d474bce4a0c89e5fda41a7940e81
[INFO] validating manifest of monorkin/stanko.io-backend 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 monorkin/stanko.io-backend 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 monorkin/stanko.io-backend
[INFO] finished frobbing monorkin/stanko.io-backend
[INFO] frobbed toml for monorkin/stanko.io-backend written to work/ex/beta-1.37-6/sources/1.36.0/gh/monorkin/stanko.io-backend/Cargo.toml
[INFO] started frobbing monorkin/stanko.io-backend
[INFO] finished frobbing monorkin/stanko.io-backend
[INFO] frobbed toml for monorkin/stanko.io-backend written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/monorkin/stanko.io-backend/Cargo.toml
[INFO] crate monorkin/stanko.io-backend 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 monorkin/stanko.io-backend 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/monorkin/stanko.io-backend:/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] d4433f46f3abd3a77c191688ecf089332199c8bffa5aa41d4eca3089e213bba6
[INFO] running `"docker" "start" "-a" "d4433f46f3abd3a77c191688ecf089332199c8bffa5aa41d4eca3089e213bba6"`
[INFO] [stderr]    Compiling gcc v0.3.45
[INFO] [stderr]    Compiling backtrace v0.3.0
[INFO] [stderr]    Compiling state v0.2.1
[INFO] [stderr]    Compiling crossbeam v0.2.10
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling pq-sys v0.4.3
[INFO] [stderr]    Compiling time v0.1.37
[INFO] [stderr]    Compiling num_cpus v1.4.0
[INFO] [stderr]    Compiling thread-id v3.0.0
[INFO] [stderr]    Compiling memchr v1.0.1
[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/state-0.2.1/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(const_fn)]
[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 `state`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "d4433f46f3abd3a77c191688ecf089332199c8bffa5aa41d4eca3089e213bba6"`
[INFO] running `"docker" "rm" "-f" "d4433f46f3abd3a77c191688ecf089332199c8bffa5aa41d4eca3089e213bba6"`
[INFO] [stdout] d4433f46f3abd3a77c191688ecf089332199c8bffa5aa41d4eca3089e213bba6