[INFO] updating cached repository notomo/vimonga
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/notomo/vimonga
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/notomo/vimonga" "work/ex/beta-1.37-6/sources/1.36.0/gh/notomo/vimonga"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/notomo/vimonga'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/notomo/vimonga" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/notomo/vimonga"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/notomo/vimonga'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 963852a222ed800b8a95ce439deb17e0a9ee752a
[INFO] sha for GitHub repo notomo/vimonga: 963852a222ed800b8a95ce439deb17e0a9ee752a
[INFO] validating manifest of notomo/vimonga 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 notomo/vimonga 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 notomo/vimonga
[INFO] finished frobbing notomo/vimonga
[INFO] frobbed toml for notomo/vimonga written to work/ex/beta-1.37-6/sources/1.36.0/gh/notomo/vimonga/Cargo.toml
[INFO] started frobbing notomo/vimonga
[INFO] finished frobbing notomo/vimonga
[INFO] frobbed toml for notomo/vimonga written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/notomo/vimonga/Cargo.toml
[INFO] crate notomo/vimonga 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 notomo/vimonga 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-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/notomo/vimonga:/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] ae17eb135f55a73acb21d7290b1d33194bca6511111f579e31b20634702897b4
[INFO] running `"docker" "start" "-a" "ae17eb135f55a73acb21d7290b1d33194bca6511111f579e31b20634702897b4"`
[INFO] [stderr]    Compiling serde v1.0.87
[INFO] [stderr]    Compiling data-encoding v2.1.2
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling serde_derive v1.0.87
[INFO] [stderr]    Compiling pbkdf2 v0.2.3
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling scan_fmt v0.1.3
[INFO] [stderr]    Compiling serde_json v1.0.38
[INFO] [stderr]    Compiling textnonce v0.6.4
[INFO] [stderr]    Compiling bson v0.13.0
[INFO] [stderr]    Compiling mongodb v0.3.12
[INFO] [stderr]    Compiling vimonga v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.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 `vimonga`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ae17eb135f55a73acb21d7290b1d33194bca6511111f579e31b20634702897b4"`
[INFO] running `"docker" "rm" "-f" "ae17eb135f55a73acb21d7290b1d33194bca6511111f579e31b20634702897b4"`
[INFO] [stdout] ae17eb135f55a73acb21d7290b1d33194bca6511111f579e31b20634702897b4